Lint `async` identifiers in 2018 preparation mode #52375

oli-obk · 2018-07-14T14:41:50Z

alexcrichton · 2018-07-17T16:21:14Z

Thanks for the PR @oli-obk! Since using async as an identifier can cause breakage in the 2018 edition should this also be part of the rust_2018_compatibility group instead of the idioms group?

Also, could the test be expanded to cover cases like:

trait async {}
struct async {}
let async: async = async {};
static async: u32 = 0;
const async: u32 = 0;
impl async for MyStruct {}
impl Foo { fn async() {} }

rust-highfive · 2018-07-17T18:11:08Z

The job x86_64-gnu-llvm-5.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
  Downloading https://files.pythonhosted.org/packages/4a/98/035298bacd2d0041f0a1c919ebd81c8e7d5211c4282b9e5bf97bb9f5c416/awscli-1.15.60-py2.py3-none-any.whl (1.3MB)
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Collecting botocore==1.10.59 (from awscli)
/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
  Downloading https://files.pythonhosted.org/packages/bf/77/26dab42032978b5f547869836523701279fc207d4affcad74b4b6d65f13f/botocore-1.10.59-py2.py3-none-any.whl (4.4MB)
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---

[00:03:55] travis_fold:start:tidy
travis_time:start:tidy
tidy check
[00:03:55] tidy error: /checkout/src/test/ui/rust-2018/async-ident.rs: missing trailing newline
[00:03:57] some tidy checks failed
[00:03:57] 
[00:03:57] 
[00:03:57] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/tidy" "/checkout/src" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "--no-vendor" "--quiet"
[00:03:57] 
[00:03:57] 
[00:03:57] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test src/tools/tidy
[00:03:57] Build completed unsuccessfully in 0:00:49
[00:03:57] Build completed unsuccessfully in 0:00:49
[00:03:57] Makefile:79: recipe for target 'tidy' failed
[00:03:57] make: *** [tidy] Error 1

The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:00b1490e
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
---
travis_time:end:04184e76:start=1531850589720065294,finish=1531850589727149922,duration=7084628
travis_fold:end:after_failure.3
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travis_time:start:001a3931
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:end:after_failure.4
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travis_time:start:234e4f36
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$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:079e8205
$ dmesg | grep -i kill

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

alexcrichton · 2018-07-17T18:18:50Z

src/librustc_lint/builtin.rs

+
+declare_lint! {
+    pub ASYNC_IDENTS,
+    Deny,


Just to confirm, but the Deny here was for tests?

For the other 2018 lints at least they're all set to Allow by default and they're only active with the lint group turned on (which rustfix does automatically)

I just followed what another 2018 incompat lint did, and that was deny

E.g.

rust/src/librustc/lint/builtin.rs

Line 302 in 68c39b9

pub DUPLICATE_MACRO_EXPORTS,

Aha, that's not a 2018 lint I think because that's changing for the 2015 edition, I was thinking of lints like this one --

rust/src/librustc/lint/builtin.rs

Lines 264 to 269 in 68c39b9

declare_lint! {

pub ABSOLUTE_PATHS_NOT_STARTING_WITH_CRATE,

Allow,

"fully qualified paths that start with a module name \

instead of `crate`, `self`, or an extern crate name"

}

Then this is wrong:

rust/src/librustc_lint/lib.rs

Lines 213 to 216 in 254f879

FutureIncompatibleInfo {

id: LintId::of(DUPLICATE_MACRO_EXPORTS),

reference: "issue #35896 <https://github.com/rust-lang/rust/issues/35896>",

edition: Some(Edition::Edition2018),

Ah I believe so! Want to file an issue for that?

edition lints can be any level they wish to be, that one probably makes more sense as deny, but this one should be allow

rust-highfive · 2018-07-17T19:43:55Z

The job x86_64-gnu-llvm-5.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

    100% |████████████████████████████████| 51kB 9.5MB/s 
Collecting botocore==1.10.59 (from awscli)
/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
  Downloading https://files.pythonhosted.org/packages/bf/77/26dab42032978b5f547869836523701279fc207d4affcad74b4b6d65f13f/botocore-1.10.59-py2.py3-none-any.whl (4.4MB)
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---
[00:46:35] ....................................................................................................
[00:46:39] ............................................................................................i.......
[00:46:42] ..................................................................................i.................
[00:46:46] ....................................................................................................
[00:46:49] ....................................F...............................................................
[00:46:53] ....................................................................................................
start":1207,"byte_end":1212,"line_start":46,"line_end":46,"column_start":12,"column_end":17,"is_primary":true,"text":[{"text":"    static async: u32 = 0;","highlight_start":12,"highlight_end":17}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!","code":null,"level":"warning","spans":[],"children":[],"rendered":null},{"message":"for more information, see issue #49716 <https://github.com/rust-lang/rust/issues/49716>","code":null,"level":"note","spans":[],"children":[],"rendered":null},{"message":"you can use a raw identifier to stay compatible","code":null,"level":"help","spans":[{"file_name":"/checkout/src/test/ui/rust-2018/async-ident.rs","byte_start":1207,"byte_end":1212,"line_start":46,"line_end":46,"column_start":12,"column_end":17,"is_primary":true,"text":[{"text":"    static async: u32 = 0;","highlight_start":12,"highlight_end":17}],"label":null,"suggested_replacement":"r#async","suggestion_applicability":"MachineApplicable","expansion":null}],"children":[],"rendered":null}],"rendered":"error: `async` is a keyword in the 2018 edition\n  --> /checkout/src/test/ui/rust-2018/async-ident.rs:46:12\n   |\nLL |     static async: u32 = 0;\n   |            ^^^^^ help: you can use a raw identifier to stay compatible: `r#async`\n   |\n   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!\n   = note: for more information, see issue #49716 <https://github.com/rust-lang/ruync`\n   |\n   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!\n   = note: for more information, see issue #49716 <https://github.com/rust-lang/rust/issues/49716>\n\n"}
[00:46:58] {"message":"`async` is a keyword in the 2018 edition","code":{"code":"async_idents","explanation":null},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/rust-2018/async-ident.rs","byte_start":1431,"byte_end":1436,"line_start":58,"line_end":58,"column_start":15,"column_end":20,"is_primary":true,"text":[{"text":"impl Foo { fn async() {} }","highlight_start":15,"highlight_end":20}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!","code":null,"level":"warning","spans":[],"children":[],"rendered":null},{"message":"for more information, see issue #49716 <https://github.com/rust-lang/rust/issues/49716>","code":null,"level":"note","spans":[],"children":[],"rendered":null},{"message":"you can use a raw identifier to stay compatible","code":null,"level":"help","spans":[{"file_name":"/checkout/src/test/ui/rust-2018/async-ident.rs","byte_start":1431,"byte_end":1436,"line_start":58,"line_end":58,"column_start":15,"column_end":20,"is_primary":true,"text":[{"text":"impl Foo { fn async() {} }","highlight_start":15,"highlight_end":20}],"label":null,"suggested_replacement":"r#async","suggestion_applicability":"MachineApplicable","expansion":null}],"children":[],"rendered":null}],"rendered"3680124 .
2330976 ./obj/build
1737756 ./obj/build/x86_64-unknown-linux-gnu
785056 ./src
563544 ./.git
---
143656 ./obj/build/x86_64-unknown-linux-gnu/stage1-std
132888 ./obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu
132884 ./obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release
130516 ./obj/build/bootstrap/debug/incremental/bootstrap-3kaq1kqcanyi4
130512 ./obj/build/bootstrap/debug/incremental/bootstrap-3kaq1kqcanyi4/s-f2zvzkilgl-14ilwz3-xx3ruytk6cjw
129516 ./obj/build/x86_64-unknown-linux-gnu/stage0-bootstrap-tools/x86_64-nknown-linux-gnu/stage0-rustc
53136 ./obj/build/x86_64-unknown-linux-gnu/stage0/bin
52532 ./obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu
52528 ./obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release

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Manishearth

r=me with deny replaced with allow

Manishearth

r=me with deny replacd with allow

oli-obk · 2018-07-18T09:37:39Z

@bors r=Manishearth

bors · 2018-07-18T09:37:40Z

📌 Commit 3fb907f49d3d6864b0d138870b86b5c5116354c9 has been approved by Manishearth

oli-obk · 2018-07-18T09:45:29Z

@bors r=Manishearth

bors · 2018-07-18T09:45:30Z

📌 Commit 68c93e7 has been approved by Manishearth

kennytm · 2018-07-18T14:33:38Z

@bors p=332

bors · 2018-07-18T15:04:25Z

⌛ Testing commit 68c93e7 with merge 12ed235...

@Manishearth

…anishearth Lint `async` identifiers in 2018 preparation mode r? @Manishearth fixes #49716

bors · 2018-07-18T17:12:27Z

☀️ Test successful - status-appveyor, status-travis
Approved by: Manishearth
Pushing 12ed235 to master...

Remove unused macro argument

22d21b1

rust-highfive assigned Manishearth Jul 14, 2018

rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Jul 14, 2018

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oli-obk force-pushed the the_early_lint_pass_gets_the_worm branch from d2d85d5 to 6cd25b1 Compare July 14, 2018 15:38

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Lint the use of async as an identifier

15a8a66

oli-obk force-pushed the the_early_lint_pass_gets_the_worm branch from 6cd25b1 to 15a8a66 Compare July 14, 2018 18:44

alexcrichton added this to the Rust 2018 Preview 2 milestone Jul 17, 2018

alexcrichton mentioned this pull request Jul 17, 2018

Write lint for usage of edition-gated keywords #49716

Closed

alexcrichton added the A-edition-2018-lints label Jul 17, 2018

Make async_idents an edition incompat lint

9520804

alexcrichton reviewed Jul 17, 2018

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oli-obk force-pushed the the_early_lint_pass_gets_the_worm branch from d9280b2 to 3fb907f Compare July 18, 2018 08:57

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jul 18, 2018

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Make async_idents allow-by-default

68c93e7

oli-obk force-pushed the the_early_lint_pass_gets_the_worm branch from 3fb907f to 68c93e7 Compare July 18, 2018 09:45

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Auto merge of #52375 - oli-obk:the_early_lint_pass_gets_the_worm, r=M…

12ed235

…anishearth Lint `async` identifiers in 2018 preparation mode r? @Manishearth fixes #49716

bors merged commit 68c93e7 into rust-lang:master Jul 18, 2018

flip1995 mentioned this pull request Jul 24, 2018

suboptimal suggestion with match and macro expanded arms rust-lang/rust-clippy#2954

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Lint `async` identifiers in 2018 preparation mode #52375

Lint `async` identifiers in 2018 preparation mode #52375

oli-obk commented Jul 14, 2018 •

edited

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bors commented Jul 18, 2018

	declare_lint! {
	pub ABSOLUTE_PATHS_NOT_STARTING_WITH_CRATE,
	Allow,
	"fully qualified paths that start with a module name \
	instead of `crate`, `self`, or an extern crate name"
	}

	FutureIncompatibleInfo {
	id: LintId::of(DUPLICATE_MACRO_EXPORTS),
	reference: "issue #35896 <https://github.com/rust-lang/rust/issues/35896>",
	edition: Some(Edition::Edition2018),

Lint async identifiers in 2018 preparation mode #52375

Lint async identifiers in 2018 preparation mode #52375

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Lint `async` identifiers in 2018 preparation mode #52375

Lint `async` identifiers in 2018 preparation mode #52375

oli-obk commented Jul 14, 2018 •

edited

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