[DO NOT MERGE] Tail expr drop order crater run #129607

dingxiangfei2009 · 2024-08-26T10:33:04Z

I would like to nominate a crater run for a build and test build-and-test.

Through this experiment, we would like to find out the extend of breakage in the ecosystem due to the change in drop order. This will help us evaluate the migration strategy and lint level.

rustbot · 2024-08-26T10:33:12Z

r? @Nadrieril

rustbot has assigned @Nadrieril.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

Use r? to explicitly pick a reviewer

dingxiangfei2009 · 2024-08-26T10:33:18Z

cc @traviscross

jieyouxu · 2024-08-26T10:43:50Z

r? jieyouxu

jieyouxu · 2024-08-26T10:45:48Z

compiler/rustc_hir_analysis/src/check/region.rs

-            if visitor.tcx.features().shorter_tail_lifetimes
-                && blk.span.edition().at_least_rust_2024()
-            {
+            if blk.span.edition().at_least_rust_2021() {


Question: note that this will limit your analysis of breakage to crates that are edition=2021 and beyond. Does previous editions have tail expr drop changes? Or should this not be gated on editions at all?

Forgot to say. I think not and the drop order should have been consistent before and including Edition 2021.

traviscross · 2024-08-26T10:55:15Z

In side discussion, I've suggested revising this PR such that it will both have the new lint fire at deny-by-default and will enable the new behavior. That way, we'll get a full list of all crates affected in any way. We can then do more targeted and faster crater runs against that list then, if needed.

@dingxiangfei2009 is working on that.

dingxiangfei2009 · 2024-08-26T10:57:23Z

@jieyouxu for context, let's do a build-and-test with +rustflags=-Dtail-expr-drop-order

Does this craterbot flag make sense @traviscross ?

jieyouxu · 2024-08-26T10:59:02Z

TC can also run crater so yeah whatever makes sense

dingxiangfei2009 · 2024-08-26T11:17:31Z

@jieyouxu a few adjustments

Given that it is possible to migration code straight from Edition 2015 to 2024, I will drop the the edition gate everywhere the feature touches, to maximise the coverage of this change on more crates.

jieyouxu · 2024-08-26T11:19:42Z

I suspect you'll also need to temporarily ignore a few tests so the try job can build

jieyouxu · 2024-08-26T11:51:04Z

the gnu-tools failure looks genuine, but the heavy macro usage makes it hard to tell the root cause

jieyouxu · 2024-08-26T11:57:28Z

Locally:

error[E0716]: temporary value dropped while borrowed
    --> /home/gh-jieyouxu/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2327:17
     |
584  |   macro_rules! event {
     |   ------------------
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
664  | |                 $crate::Event::dispatch(
...    |
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |________________------------------------------------------------------------- borrow later used here
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
687  | |         )
     | |_________- in this macro invocation (#3)
...
1691 |   macro_rules! warn {
     |   ----------------- in this expansion of `warn!` (#1)
...
1860 | /         $crate::event!(
1861 | |             target: module_path!(),
1862 | |             $crate::Level::WARN,
1863 | |             {},
1864 | |             $($arg)+
1865 | |         )
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
2329 |               ))
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/profiling.rs:596:17
     |
596  | /                 warn!(
597  | |                     "Unknown self-profiler events specified: {}. Available options are: {}.",
598  | |                     unknown_events.join(", "),
599  | |                     EVENT_FILTERS_BY_NAME
...    |
603  | |                         .join(", ")
604  | |                 );
     | |_________________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value

For more information about this error, try `rustc --explain E0716`.

jieyouxu · 2024-08-26T11:59:35Z

Link: https://github.com/tokio-rs/tracing/blob/8e35927d7ef5bad3b20fd53592ddb951ae7bec91/tracing/src/macros.rs#L2319-L2331

rust-log-analyzer · 2024-08-26T12:03:51Z

The job x86_64-gnu-tools failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/implementation/mod.rs:136:9
     |
136  |           debug!("graph: add_edge({:?}, {:?}, {:?})", source, target, data);
     |
    ::: /checkout/library/core/src/macros/mod.rs:1030:5
     |
1030 |       macro_rules! format_args {
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/implementation/mod.rs:136:9
     |
136  |           debug!("graph: add_edge({:?}, {:?}, {:?})", source, target, data);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/implementation/mod.rs:136:9
     |
     |
136  |           debug!("graph: add_edge({:?}, {:?}, {:?})", source, target, data);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> compiler/rustc_data_structures/src/graph/scc/mod.rs:206:13
     |
206  |               self.len(),
     |               ^^^^^^^^^^ creates a temporary value which is freed while still in use
     |
    ::: /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:661:13
     |
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
2329 |               ))
     |                - temporary value is freed at the end of this statement
     |
     = note: consider using a `let` binding to create a longer lived value
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
    --> compiler/rustc_data_structures/src/graph/scc/mod.rs:207:13
     |
207  |               &self.all_successors[all_successors_start..all_successors_end],
     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
    ::: /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:661:13
     |
     |
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
2329 |               ))
     |                - temporary value is freed at the end of this statement
     |
     = note: consider using a `let` binding to create a longer lived value
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:686:25
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:204:9
     |
204  | /         debug!(
205  | |             "create_scc({:?}) successors={:?}, annotation={:?}",
206  | |             self.len(),
207  | |             &self.all_successors[all_successors_start..all_successors_end],
209  | |         );
     | |_________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:204:9
     |
204  | /         debug!(
205  | |             "create_scc({:?}) successors={:?}, annotation={:?}",
206  | |             self.len(),
207  | |             &self.all_successors[all_successors_start..all_successors_end],
209  | |         );
     | |_________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:204:9
     |
     |
204  | /         debug!(
205  | |             "create_scc({:?}) successors={:?}, annotation={:?}",
206  | |             self.len(),
207  | |             &self.all_successors[all_successors_start..all_successors_end],
209  | |         );
     | |_________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:686:25
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:411:17
     |
411  |                   debug!("find_state(r = {node:?} in state {:?})", self.node_states[node]);
     |
    ::: /checkout/library/core/src/macros/mod.rs:1030:5
     |
1030 |       macro_rules! format_args {
---
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:485:13
     |
485  |               debug!("Compressing {node:?} down to {previous_node:?} with state {assigned_state:?}");
     |
    ::: /checkout/library/core/src/macros/mod.rs:1030:5
     |
1030 |       macro_rules! format_args {
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:411:17
     |
411  |                   debug!("find_state(r = {node:?} in state {:?})", self.node_states[node]);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:485:13
     |
485  |               debug!("Compressing {node:?} down to {previous_node:?} with state {assigned_state:?}");
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:411:17
     |
     |
411  |                   debug!("find_state(r = {node:?} in state {:?})", self.node_states[node]);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:485:13
     |
     |
485  |               debug!("Compressing {node:?} down to {previous_node:?} with state {assigned_state:?}");
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2184:10
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2223 | /         $crate::valueset!(
2223 | /         $crate::valueset!(
2224 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2225 | |             $next,
2226 | |             $($rest)*
     | |_________- in this macro invocation (#5)
...
2261 | /         $crate::valueset!(
2261 | /         $crate::valueset!(
2262 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2263 | |             $next,
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:601:17
     |
601  |                   debug!(?node, ?successor_node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2224:43
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
...
2224 |               @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
     |                                             ^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:601:17
     |
601  |                   debug!(?node, ?successor_node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2262:43
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
...
2223 | /         $crate::valueset!(
2224 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2225 | |             $next,
2226 | |             $($rest)*
     | |_________- in this macro invocation (#5)
...
...
2262 |               @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
     |                                             ^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:601:17
     |
601  |                   debug!(?node, ?successor_node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2327:17
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#3)
     |   --------------------- in this expansion of `$crate::valueset!` (#3)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:601:17
     |
     |
601  |                   debug!(?node, ?successor_node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:686:25
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:512:9
     |
512  |           debug!("Walk unvisited node: {initial:?}");
     |
    ::: /checkout/library/core/src/macros/mod.rs:1030:5
     |
1030 |       macro_rules! format_args {
---
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:563:13
     |
563  | /             debug!(
564  | |                 "Visiting {node:?} at depth {depth:?}, annotation: {current_component_annotation:?}"
     | |_____________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value


error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:686:25
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:662:13
     |
662  |               debug!("Finished walk from {node:?} with annotation: {current_component_annotation:?}");
     |
    ::: /checkout/library/core/src/macros/mod.rs:1030:5
     |
1030 |       macro_rules! format_args {
---
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:692:17
     |
692  |                   debug!("Creating SCC rooted in {node:?} with successor {:?}", frame.successor_node);
     |
    ::: /checkout/library/core/src/macros/mod.rs:1030:5
     |
1030 |       macro_rules! format_args {
---
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:612:25
     |
612  | /                         debug!(
613  | |                             "Cycle found from {node:?}, minimum depth: {successor_min_depth:?}, annotation: {successor_annotation:?}"
     | |_________________________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value


error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:686:25
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:630:25
     |
630  | / ...   debug!(
631  | | ...       "Complete; {node:?} is root of complete-visited SCC idx {successor_scc_index:?} with annotation {successor_annotation:?}"
     | |_______- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value


error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:686:25
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:642:25
     |
642  |                           debug!("Recursing down into {successor_node:?} at depth {depth:?}");
     |
    ::: /checkout/library/core/src/macros/mod.rs:1030:5
     |
1030 |       macro_rules! format_args {
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:512:9
     |
512  |           debug!("Walk unvisited node: {initial:?}");
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:563:13
     |
563  | /             debug!(
564  | |                 "Visiting {node:?} at depth {depth:?}, annotation: {current_component_annotation:?}"
     | |_____________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value


error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2184:10
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2223 | /         $crate::valueset!(
2223 | /         $crate::valueset!(
2224 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2225 | |             $next,
2226 | |             $($rest)*
     | |_________- in this macro invocation (#5)
...
2261 | /         $crate::valueset!(
2261 | /         $crate::valueset!(
2262 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2263 | |             $next,
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:571:21
     |
571  |                       debug!(?depth, ?node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:662:13
     |
662  |               debug!("Finished walk from {node:?} with annotation: {current_component_annotation:?}");
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:692:17
     |
692  |                   debug!("Creating SCC rooted in {node:?} with successor {:?}", frame.successor_node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:612:25
     |
612  | /                         debug!(
613  | |                             "Cycle found from {node:?}, minimum depth: {successor_min_depth:?}, annotation: {successor_annotation:?}"
     | |_________________________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value


error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2184:10
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2223 | /         $crate::valueset!(
2223 | /         $crate::valueset!(
2224 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2225 | |             $next,
2226 | |             $($rest)*
     | |_________- in this macro invocation (#5)
...
2261 | /         $crate::valueset!(
2261 | /         $crate::valueset!(
2262 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2263 | |             $next,
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:618:29
     |
618  |   ...                   debug!(?node, ?successor_min_depth);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:630:25
     |
630  | / ...   debug!(
631  | | ...       "Complete; {node:?} is root of complete-visited SCC idx {successor_scc_index:?} with annotation {successor_annotation:?}"
     | |_______- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value


error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2184:10
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2223 | /         $crate::valueset!(
2223 | /         $crate::valueset!(
2224 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2225 | |             $next,
2226 | |             $($rest)*
     | |_________- in this macro invocation (#5)
...
2261 | /         $crate::valueset!(
2261 | /         $crate::valueset!(
2262 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2263 | |             $next,
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:635:25
     |
635  |                           debug!(?node, ?successor_scc_index);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:642:25
     |
642  |                           debug!("Recursing down into {successor_node:?} at depth {depth:?}");
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2184:10
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2223 | /         $crate::valueset!(
2223 | /         $crate::valueset!(
2224 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2225 | |             $next,
2226 | |             $($rest)*
     | |_________- in this macro invocation (#5)
...
2261 | /         $crate::valueset!(
2261 | /         $crate::valueset!(
2262 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2263 | |             $next,
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:643:25
     |
643  |                           debug!(?depth, ?successor_node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2224:43
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
...
2224 |               @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
     |                                             ^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:571:21
     |
571  |                       debug!(?depth, ?node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2224:43
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
...
2224 |               @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
     |                                             ^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:618:29
     |
618  |   ...                   debug!(?node, ?successor_min_depth);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2224:43
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
...
2224 |               @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
     |                                             ^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:635:25
     |
635  |                           debug!(?node, ?successor_scc_index);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2224:43
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
...
2224 |               @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
     |                                             ^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:643:25
     |
643  |                           debug!(?depth, ?successor_node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2262:43
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
...
2223 | /         $crate::valueset!(
2224 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2225 | |             $next,
2226 | |             $($rest)*
     | |_________- in this macro invocation (#5)
...
...
2262 |               @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
     |                                             ^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:571:21
     |
571  |                       debug!(?depth, ?node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2262:43
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
...
2223 | /         $crate::valueset!(
2224 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2225 | |             $next,
2226 | |             $($rest)*
     | |_________- in this macro invocation (#5)
...
...
2262 |               @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
     |                                             ^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:618:29
     |
618  |   ...                   debug!(?node, ?successor_min_depth);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2262:43
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   ---------------------
     |   ---------------------
     |   |
     |   in this expansion of `$crate::valueset!` (#3)
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
...
2223 | /         $crate::valueset!(
2224 | |             @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
2225 | |             $next,
2226 | |             $($rest)*
     | |_________- in this macro invocation (#5)
...
...
2262 |               @ { $($out),*, (&$next, Some(&debug(&$($k).+) as &dyn Value)) },
     |                                             ^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#4)
     |
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:635:25
     |
635  |                           debug!(?node, ?successor_scc_index);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2262:43
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:512:9
     |
     |
512  |           debug!("Walk unvisited node: {initial:?}");
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:563:13
     |
     |
563  | /             debug!(
564  | |                 "Visiting {node:?} at depth {depth:?}, annotation: {current_component_annotation:?}"
     | |_____________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value


error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2327:17
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#3)
     |   --------------------- in this expansion of `$crate::valueset!` (#3)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:571:21
     |
     |
571  |                       debug!(?depth, ?node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:662:13
     |
     |
662  |               debug!("Finished walk from {node:?} with annotation: {current_component_annotation:?}");
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:692:17
     |
     |
692  |                   debug!("Creating SCC rooted in {node:?} with successor {:?}", frame.successor_node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:612:25
     |
     |
612  | /                         debug!(
613  | |                             "Cycle found from {node:?}, minimum depth: {successor_min_depth:?}, annotation: {successor_annotation:?}"
     | |_________________________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value


error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2327:17
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#3)
     |   --------------------- in this expansion of `$crate::valueset!` (#3)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:618:29
     |
     |
618  |   ...                   debug!(?node, ?successor_min_depth);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:630:25
     |
     |
630  | / ...   debug!(
631  | | ...       "Complete; {node:?} is root of complete-visited SCC idx {successor_scc_index:?} with annotation {successor_annotation:?}"
     | |_______- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value


error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2327:17
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#3)
     |   --------------------- in this expansion of `$crate::valueset!` (#3)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:635:25
     |
     |
635  |                           debug!(?node, ?successor_scc_index);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:642:25
     |
     |
642  |                           debug!("Recursing down into {successor_node:?} at depth {depth:?}");
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:2327:17
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#3)
...
1274 |   macro_rules! debug {
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
...
1408 | /         $crate::event!(
1409 | |             target: module_path!(),
1410 | |             $crate::Level::DEBUG,
1411 | |             { ?$($k).+, $($field)*}
     | |_________- in this macro invocation (#2)
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#3)
     |   --------------------- in this expansion of `$crate::valueset!` (#3)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/graph/scc/mod.rs:643:25
     |
     |
643  |                           debug!(?depth, ?successor_node);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:686:25
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/obligation_forest/mod.rs:348:13
     |
348  |               debug!("register_obligation_at: ignoring already done obligation: {:?}", obligation);
     |
    ::: /checkout/library/core/src/macros/mod.rs:1030:5
     |
1030 |       macro_rules! format_args {
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/obligation_forest/mod.rs:348:13
     |
348  |               debug!("register_obligation_at: ignoring already done obligation: {:?}", obligation);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1274 |   macro_rules! debug {
     |   ------------------ in this expansion of `debug!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/obligation_forest/mod.rs:348:13
     |
     |
348  |               debug!("register_obligation_at: ignoring already done obligation: {:?}", obligation);
     |
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
error[E0716]: temporary value dropped while borrowed
    --> compiler/rustc_data_structures/src/profiling.rs:598:21
     |
598  |                       unknown_events.join(", "),
     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
    ::: /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:661:13
     |
     |
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
2329 |               ))
     |                - temporary value is freed at the end of this statement
     |
     = note: consider using a `let` binding to create a longer lived value
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
    --> compiler/rustc_data_structures/src/profiling.rs:599:21
     |
599  | /                     EVENT_FILTERS_BY_NAME
600  | |                         .iter()
601  | |                         .map(|&(name, _)| name.to_string())
602  | |                         .collect::<Vec<_>>()
603  | |                         .join(", ")
     | |___________________________________^ creates a temporary value which is freed while still in use
    ::: /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:661:13
     |
     |
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
2329 |               ))
     |                - temporary value is freed at the end of this statement
     |
     = note: consider using a `let` binding to create a longer lived value
     = note: consider using a `let` binding to create a longer lived value

error[E0716]: temporary value dropped while borrowed
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/macros.rs:686:25
     |
584  |   macro_rules! event {
     |   ------------------ in this expansion of `$crate::event!` (#2)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     | |____________________________________________________________________________- borrow later used here
...
686  |               { message = format_args!($($arg)+), $($fields)* }
     |                           |
     |                           creates a temporary value which is freed while still in use
     |                           in this macro invocation (#3)
...
---
     |       ------------------------ in this expansion of `format_args!` (#3)
     |
    ::: compiler/rustc_data_structures/src/profiling.rs:596:17
     |
596  | /                 warn!(
597  | |                     "Unknown self-profiler events specified: {}. Available options are: {}.",
598  | |                     unknown_events.join(", "),
599  | |                     EVENT_FILTERS_BY_NAME
...    |
603  | |                         .join(", ")
     | |_________________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value

---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1691 |   macro_rules! warn {
     |   ----------------- in this expansion of `warn!` (#1)
---
     |   in this expansion of `$crate::valueset!` (#4)
     |   in this expansion of `$crate::valueset!` (#5)
     |   in this expansion of `$crate::valueset!` (#6)
...
2184 |           &[ $($val),* ]
     |            ^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2209 | /         $crate::valueset!(
2209 | /         $crate::valueset!(
2210 | |             @ { $($out),*, (&$next, Some(&$val as &dyn Value)) },
2211 | |             $next,
2212 | |             $($rest)*
     | |_________- in this macro invocation (#6)
...
...
2325 |               $fields.value_set($crate::valueset!(
     |  _______________________________-
2326 | |                 @ { },
2327 | |                 iter.next().expect("FieldSet corrupted (this is a bug)"),
2328 | |                 $($kvs)+
     | |             -- temporary value is freed at the end of this statement
     | |_____________|
     |               in this macro invocation (#5)
     |
     |
    ::: compiler/rustc_data_structures/src/profiling.rs:596:17
     |
596  | /                 warn!(
597  | |                     "Unknown self-profiler events specified: {}. Available options are: {}.",
598  | |                     unknown_events.join(", "),
599  | |                     EVENT_FILTERS_BY_NAME
...    |
603  | |                         .join(", ")
     | |_________________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value

---
     |   |
     |   in this expansion of `$crate::event!` (#2)
     |   in this expansion of `$crate::event!` (#3)
...
661  | /             (|value_set: $crate::field::ValueSet| {
662  | |                 let meta = CALLSITE.metadata();
663  | |                 // event with contextual parent
...    |
672  | |                 );
672  | |                 );
673  | |             })($crate::valueset!(CALLSITE.metadata().fields(), $($fields)*));
     |                  |
     |                  in this macro invocation (#4)
...
683  | /         $crate::event!(
683  | /         $crate::event!(
684  | |             target: $target,
685  | |             $lvl,
686  | |             { message = format_args!($($arg)+), $($fields)* }
     | |_________- in this macro invocation (#3)
...
1691 |   macro_rules! warn {
     |   ----------------- in this expansion of `warn!` (#1)
---
...
2180 |   macro_rules! valueset {
     |   --------------------- in this expansion of `$crate::valueset!` (#4)
...
2327 |                   iter.next().expect("FieldSet corrupted (this is a bug)"),
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use
2328 |                   $($kvs)+
     |                - temporary value is freed at the end of this statement
     |
    ::: compiler/rustc_data_structures/src/profiling.rs:596:17
     |
     |
596  | /                 warn!(
597  | |                     "Unknown self-profiler events specified: {}. Available options are: {}.",
598  | |                     unknown_events.join(", "),
599  | |                     EVENT_FILTERS_BY_NAME
...    |
603  | |                         .join(", ")
     | |_________________- in this macro invocation (#1)
     |
     = note: consider using a `let` binding to create a longer lived value

dingxiangfei2009 · 2024-08-26T12:16:42Z

@jieyouxu Ah good ol' time. Yes, we found out this tracing case back in April and that is why gating by Edition 2024 is very necessary.

@traviscross Given that we can't really remove the edition gate on the feature, does it still make sense to do the crater run? Maybe it is just sufficient to just run the crater on the lint itself?

traviscross · 2024-08-26T12:36:54Z

If we haven't yet, it'd be definitely worth making a PR to tracing and any other known widely-used crates affected by this.

Presumably what we'd be looking for, by enabling the behavior in all editions in this run, would be any crates that are broken but for which the lint doesn't fire. That seems worth knowing, if possible.

If that's too tricky to do, though, and we're confident that the lint catches the important cases, then just doing a crater run on the lint is probably sufficient.

dingxiangfei2009 · 2024-08-26T19:02:26Z

@traviscross I am working on a tracing PR but it will take a while. Basically, I need to take good care of semantics such as not realising the expressions in the logging directives when the logging is unnecessary.

I just got to know that tracing is still written in Edition 2018 which is interesting.

I feel like that we should give the lint the go ahead first.

dingxiangfei2009 · 2024-08-26T21:23:34Z

@traviscross I managed to fix the crate, juhu! tokio-rs/tracing#3066

Whether this gets checked in will be at their mercy. 🤞

bors · 2024-10-23T15:52:35Z

☔ The latest upstream changes (presumably #132027) made this pull request unmergeable. Please resolve the merge conflicts.

dingxiangfei2009 · 2024-10-26T21:21:49Z

We will run further crater run on the second version of the lint. It has been a great journey and see you all over there. Ciao!

rustbot assigned Nadrieril Aug 26, 2024

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Aug 26, 2024

dingxiangfei2009 changed the title ~~Tail expr drop order crater run~~ [DO NOT MERGE] Tail expr drop order crater run Aug 26, 2024

traviscross mentioned this pull request Aug 26, 2024

Tracking Issue for RFC 3606: Drop temporaries in tail expressions before local variables #123739

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rustbot assigned jieyouxu and unassigned Nadrieril Aug 26, 2024

dingxiangfei2009 force-pushed the tail-expr-drop-order-crater-run branch from 975059d to 78ec48b Compare August 26, 2024 10:44

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[DO NOT MERGE] crater run on the tail expression drop order lint #129604

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crater run, off the wheel chocks

7a1491c

dingxiangfei2009 force-pushed the tail-expr-drop-order-crater-run branch from 78ec48b to 7a1491c Compare August 26, 2024 11:15

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disable a swarm of tests

c39894a

jieyouxu added S-experimental Status: Ongoing experiment that does not require reviewing and won't be merged in its current state. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Oct 14, 2024

bors added the S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. label Oct 23, 2024

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[DO NOT MERGE] Tail expr drop order crater run #129607

[DO NOT MERGE] Tail expr drop order crater run #129607

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[DO NOT MERGE] Tail expr drop order crater run #129607

[DO NOT MERGE] Tail expr drop order crater run #129607

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