ICE: hygienic-label-1.rs -Zunpretty=everybody_loops : failed to process buffered lint here (dummy = false)

[matthiaskrgr]

code from ./src/test/ui/hygiene/hygienic-label-1.rs

Code

macro_rules! foo {
    () => { break 'x; } //~ ERROR use of undeclared label `'x`
}

pub fn main() {
    'x: loop { foo!() }
}
 

Meta

rustc --version --verbose:

rustc 1.55.0-nightly (014026d1a 2021-07-19)
binary: rustc
commit-hash: 014026d1a7ca991f82f12efa95ef4dffb29dc8af
commit-date: 2021-07-19
host: x86_64-unknown-linux-gnu
release: 1.55.0-nightly
LLVM version: 12.0.1

Error output

rustc ./src/test/ui/hygiene/hygienic-label-1.rs -Zunpretty=everybody_loops

#![feature(prelude_import)]
#![no_std]
#[prelude_import]
use ::std::prelude::rust_2015::*;
#[macro_use]
extern crate std;
macro_rules! foo {
    () => { break 'x ; } //~ ERROR use of undeclared label `'x`
}

pub fn main() { loop { } }
error: internal compiler error: failed to process buffered lint here (dummy = false)
 --> ./src/test/ui/hygiene/hygienic-label-1.rs:2:21
  |
2 |     () => { break 'x; } //~ ERROR use of undeclared label `'x`
  |                     ^
...
6 |     'x: loop { foo!() }
  |                ------ in this macro invocation
  |
  = note: delayed at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/compiler/rustc_lint/src/early.rs:402:18
  = note: this error: internal compiler error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)

thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler/rustc_errors/src/lib.rs:1050:13
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.55.0-nightly (014026d1a 2021-07-19) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z unpretty=everybody_loops

query stack during panic:
end of query stack

Backtrace

#![feature(prelude_import)]
#![no_std]
#[prelude_import]
use ::std::prelude::rust_2015::*;
#[macro_use]
extern crate std;
macro_rules! foo {
    () => { break 'x ; } //~ ERROR use of undeclared label `'x`
}

pub fn main() { loop { } }
error: internal compiler error: failed to process buffered lint here (dummy = false)
 --> ./src/test/ui/hygiene/hygienic-label-1.rs:2:21
  |
2 |     () => { break 'x; } //~ ERROR use of undeclared label `'x`
  |                     ^
...
6 |     'x: loop { foo!() }
  |                ------ in this macro invocation
  |
  = note: delayed at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/compiler/rustc_lint/src/early.rs:402:18
  = note: this error: internal compiler error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)

thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler/rustc_errors/src/lib.rs:1050:13
stack backtrace:
   0:     0x7f7ed6258b90 - std::backtrace_rs::backtrace::libunwind::trace::h0f5cd2ee8b0d7274
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
   1:     0x7f7ed6258b90 - std::backtrace_rs::backtrace::trace_unsynchronized::h06905b5aeda069a1
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f7ed6258b90 - std::sys_common::backtrace::_print_fmt::h4fe4c7c875072f30
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x7f7ed6258b90 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hcc0746f004a9b7ef
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/sys_common/backtrace.rs:46:22
   4:     0x7f7ed62c66cc - core::fmt::write::h9a6d9c74526a6c1b
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/core/src/fmt/mod.rs:1115:17
   5:     0x7f7ed624a315 - std::io::Write::write_fmt::h23dab4cc9ce72ee2
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/io/mod.rs:1665:15
   6:     0x7f7ed625c8ab - std::sys_common::backtrace::_print::h173dc702502d65d2
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/sys_common/backtrace.rs:49:5
   7:     0x7f7ed625c8ab - std::sys_common::backtrace::print::h61bd27c4742ba817
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/sys_common/backtrace.rs:36:9
   8:     0x7f7ed625c8ab - std::panicking::default_hook::{{closure}}::hcaae87f0495ae613
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/panicking.rs:208:50
   9:     0x7f7ed625c381 - std::panicking::default_hook::h0538e728ee080db0
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/panicking.rs:225:9
  10:     0x7f7ed6a35e91 - rustc_driver::DEFAULT_HOOK::{{closure}}::{{closure}}::h9137b7ac1a66352b
  11:     0x7f7ed625d0d9 - std::panicking::rust_panic_with_hook::h3039e236b6ca482c
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/panicking.rs:626:17
  12:     0x7f7ed625cb97 - std::panicking::begin_panic_handler::{{closure}}::h884fbab544ffd91c
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/panicking.rs:519:13
  13:     0x7f7ed625908c - std::sys_common::backtrace::__rust_end_short_backtrace::hdaf2e18ba3d91210
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/sys_common/backtrace.rs:141:18
  14:     0x7f7ed625caf9 - rust_begin_unwind
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/panicking.rs:515:5
  15:     0x7f7ed6225a9b - std::panicking::begin_panic_fmt::h34884936c58ac1e4
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/panicking.rs:457:5
  16:     0x7f7ed8e911f9 - rustc_errors::HandlerInner::flush_delayed::hcfbb4755a27b0762
  17:     0x7f7ed8e8fc5d - <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop::hc1e614a9f2b01df1
  18:     0x7f7ed854eed6 - core::ptr::drop_in_place<rustc_session::parse::ParseSess>::h953b491fa34a81a2
  19:     0x7f7ed8550c4e - <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop::h0022ece81d7ea8ce
  20:     0x7f7ed85259ad - core::ptr::drop_in_place<rustc_interface::interface::Compiler>::hd6b908cf96b1ddc0
  21:     0x7f7ed8524f96 - rustc_span::with_source_map::h0260ea075482ae79
  22:     0x7f7ed85371ba - rustc_interface::interface::create_compiler_and_run::he7ef8517199cf024
  23:     0x7f7ed852a099 - scoped_tls::ScopedKey<T>::set::h603cbfb5f6e2dd76
  24:     0x7f7ed8526eda - std::sys_common::backtrace::__rust_begin_short_backtrace::h23393d8936f34bfc
  25:     0x7f7ed8525765 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h513135f67ecd4e6b
  26:     0x7f7ed6269667 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd5b860c6542b008a
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/alloc/src/boxed.rs:1572:9
  27:     0x7f7ed6269667 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc87b98c8a3a585ed
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/alloc/src/boxed.rs:1572:9
  28:     0x7f7ed6269667 - std::sys::unix::thread::Thread::new::thread_start::ha990175c8f3779cc
                               at /rustc/014026d1a7ca991f82f12efa95ef4dffb29dc8af/library/std/src/sys/unix/thread.rs:74:17
  29:     0x7f7ed6175259 - start_thread
  30:     0x7f7ed608a5e3 - __GI___clone
  31:                0x0 - <unknown>

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.55.0-nightly (014026d1a 2021-07-19) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z unpretty=everybody_loops

query stack during panic:
end of query stack

[matthiaskrgr]

Regression in nightly-2021-07-19

[jonas-schievink]

Looks like #87274? I don't think the fix is in nightly yet

[matthiaskrgr]

Still crashes with 39d8d3a master toolchain