Multiline (more than 2 lines) inner attribute triggers ICE during doctest

[hafeoz]

Following code produces triggers an ICE when running cargo test or cargo doctest:

Code

//! ```rust
//! #![deny(
//! unused_parens,
//! )]
//! ```

Open the code on playground

Meta

rustc --version --verbose:

rustc 1.63.0-nightly (4cbaac699 2022-05-25)
binary: rustc
commit-hash: 4cbaac699c14b7ac7cc80e54823b2ef6afeb64af
commit-date: 2022-05-25
host: x86_64-unknown-linux-gnu
release: 1.63.0-nightly
LLVM version: 14.0.4

Backtrace

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s


running 1 test
test src/lib.rs - (line 1) ... FAILED

failures:

---- src/lib.rs - (line 1) stdout ----
thread 'src/lib.rs - (line 1)' panicked at 'explicit panic', compiler/rustc_errors/src/diagnostic_builder.rs:553:21
stack backtrace:
   0:     0x7faf6fdc21cd - std::backtrace_rs::backtrace::libunwind::trace::h22893a5306c091b4
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7faf6fdc21cd - std::backtrace_rs::backtrace::trace_unsynchronized::h29c3bc6f9e91819d
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7faf6fdc21cd - std::sys_common::backtrace::_print_fmt::he497d8a0ec903793
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7faf6fdc21cd - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h9c2a9d2774d81873
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7faf6fe1c01c - core::fmt::write::hba4337c43d992f49
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/core/src/fmt/mod.rs:1194:17
   5:     0x7faf6fdb3721 - std::io::Write::write_fmt::h78f748c5d5b1bfcf
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/io/mod.rs:1655:15
   6:     0x7faf6fdc52b5 - std::sys_common::backtrace::_print::h63c8b24acdd8e8ce
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7faf6fdc52b5 - std::sys_common::backtrace::print::h426700d6240cdcc2
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7faf6fdc52b5 - std::panicking::default_hook::{{closure}}::hc9a76eed0b18f82b
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:295:22
   9:     0x7faf6fdc4fa4 - std::panicking::default_hook::h2e88d02087fae196
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:311:9
  10:     0x7faf705421d1 - rustc_driver[413d55b6344850e3]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7faf6fdc5a00 - std::panicking::rust_panic_with_hook::habfdcc2e90f9fd4c
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:702:17
  12:     0x7faf6fdc57f9 - std::panicking::begin_panic_handler::{{closure}}::he054b2a83a51d2cd
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:586:13
  13:     0x7faf6fdc2684 - std::sys_common::backtrace::__rust_end_short_backtrace::ha48b94ab49b30915
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys_common/backtrace.rs:138:18
  14:     0x7faf6fdc5569 - rust_begin_unwind
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:584:5
  15:     0x7faf6fd896b3 - core::panicking::panic_fmt::h366d3a309ae17c94
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/core/src/panicking.rs:143:14
  16:     0x7faf6fd8957d - core::panicking::panic::h8705e81f284be8a5
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/core/src/panicking.rs:48:5
  17:     0x7faf723ccd8d - <rustc_errors[a7dbbf867eaca825]::diagnostic_builder::DiagnosticBuilderInner as core[a3420257622cd381]::ops::drop::Drop>::drop
  18:     0x55e94a7155ff - <scoped_tls[7ed3ce20ede545d8]::ScopedKey<rustc_span[7238ca7210ca999e]::SessionGlobals>>::with::<rustdoc[2368e8ab35c11ae8]::doctest::check_if_attr_is_complete::{closure#0}, bool>
  19:     0x55e94a869f5e - rustdoc[2368e8ab35c11ae8]::doctest::check_if_attr_is_complete
  20:     0x55e94a8685d5 - rustdoc[2368e8ab35c11ae8]::doctest::make_test
  21:     0x55e94a864fc8 - rustdoc[2368e8ab35c11ae8]::doctest::run_test::<<rustdoc[2368e8ab35c11ae8]::doctest::Collector as rustdoc[2368e8ab35c11ae8]::doctest::Tester>::add_test::{closure#2}::{closure#0}>
  22:     0x55e94a85e0eb - <<rustdoc[2368e8ab35c11ae8]::doctest::Collector as rustdoc[2368e8ab35c11ae8]::doctest::Tester>::add_test::{closure#2} as core[a3420257622cd381]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  23:     0x7faf73e4ffbe - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h1c7ec42f80b6bbf5
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/alloc/src/boxed.rs:1861:9
  24:     0x7faf73e4ffbe - test::__rust_begin_short_backtrace::h44156cd91cd40217
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/test/src/lib.rs:574:5
  25:     0x7faf73e4ed69 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h1c7ec42f80b6bbf5
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/alloc/src/boxed.rs:1861:9
  26:     0x7faf73e4ed69 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h3a32c43eeae577c5
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/core/src/panic/unwind_safe.rs:271:9
  27:     0x7faf73e4ed69 - std::panicking::try::do_call::h5c8445fa1695dfc0
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:492:40
  28:     0x7faf73e4ed69 - std::panicking::try::h843e017f98c59921
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:456:19
  29:     0x7faf73e4ed69 - std::panic::catch_unwind::heae97ad77b9c2afb
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panic.rs:137:14
  30:     0x7faf73e4ed69 - test::run_test_in_process::h4f1c957830006b83
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/test/src/lib.rs:597:18
  31:     0x7faf73e4ed69 - test::run_test::run_test_inner::{{closure}}::hcf8ece35c4bf405a
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/test/src/lib.rs:491:39
  32:     0x7faf73e185de - test::run_test::run_test_inner::{{closure}}::hbf5ba8d7bc638131
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/test/src/lib.rs:518:37
  33:     0x7faf73e185de - std::sys_common::backtrace::__rust_begin_short_backtrace::he83971fb785dc493
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys_common/backtrace.rs:122:18
  34:     0x7faf73e1ec68 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h39e8bbdf36e3745e
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/thread/mod.rs:498:17
  35:     0x7faf73e1ec68 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h6ea411f1c52eb0ea
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/core/src/panic/unwind_safe.rs:271:9
  36:     0x7faf73e1ec68 - std::panicking::try::do_call::h456700654b382ff0
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:492:40
  37:     0x7faf73e1ec68 - std::panicking::try::h08480bfb75b30726
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:456:19
  38:     0x7faf73e1ec68 - std::panic::catch_unwind::h6a5c99fdf51c894c
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panic.rs:137:14
  39:     0x7faf73e1ec68 - std::thread::Builder::spawn_unchecked_::{{closure}}::h786176e4c49e7123
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/thread/mod.rs:497:30
  40:     0x7faf73e1ec68 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h901bf2e14b264b26
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/core/src/ops/function.rs:227:5
  41:     0x7faf6fdcfbf3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha99802c2c52ada61
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/alloc/src/boxed.rs:1861:9
  42:     0x7faf6fdcfbf3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha39aea1c57e28a15
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/alloc/src/boxed.rs:1861:9
  43:     0x7faf6fdcfbf3 - std::sys::unix::thread::Thread::new::thread_start::h9f8e3d72b1f7662f
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys/unix/thread.rs:108:17
  44:     0x7faf6fd05609 - start_thread
  45:     0x7faf6faae133 - clone
  46:                0x0 - <unknown>

query stack during panic:
end of query stack


failures:
    src/lib.rs - (line 1)

test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s