ICE: delay span bug / failed to process buffered lint here: lint-qualification.rs with -Zunpretty=everybody_loops

[matthiaskrgr]

Code

code reduced from ./src/test/ui/lint/lint-qualification.rs

mod foo {
    pub fn bar() {}
}

fn main() {
    let _ = || -> Result<(), ()> { try!(Ok(())); Ok(()) }; // issue #37345

    macro_rules! m { () => {
        $crate::foo::bar(); // issue #37357
        ::foo::bar(); // issue #38682
    } }
    m!();
}

Meta

rustc --version --verbose:

rustc 1.52.0-nightly (9b471a3f5 2021-02-19)
binary: rustc
commit-hash: 9b471a3f5fe57e5c6e08acf665f2094422415a3d
commit-date: 2021-02-19
host: x86_64-unknown-linux-gnu
release: 1.52.0-nightly
LLVM version: 11.0.1

Error output

rustc ./src/test/ui/lint/lint-qualification.rs -Zunpretty=everybody_loops

#![feature(prelude_import)]
#![no_std]
#[prelude_import]
use ::std::prelude::v1::*;
#[macro_use]
extern crate std;
mod foo {
    pub fn bar() { loop  { } }
}

fn main() { // issue #37345

    macro_rules! m {
        () =>
        {
            $ crate :: foo :: bar() ; :: foo :: bar() ; // issue #37357
            // issue #38682
        }
    }
    loop  { }
}
error: internal compiler error: failed to process buffered lint here
 --> ./src/test/ui/lint/lint-qualification.rs:6:36
  |
6 |     let _ = || -> Result<(), ()> { try!(Ok(())); Ok(()) }; // issue #37345
  |                                    ^^^
  |
  = note: delayed at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/compiler/rustc_lint/src/early.rs:393:18

thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler/rustc_errors/src/lib.rs:1011:13
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 1.52.0-nightly (9b471a3f5 2021-02-19) 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::v1::*;
#[macro_use]
extern crate std;
mod foo {
    pub fn bar() { loop  { } }
}

fn main() { // issue #37345

    macro_rules! m {
        () =>
        {
            $ crate :: foo :: bar() ; :: foo :: bar() ; // issue #37357
            // issue #38682
        }
    }
    loop  { }
}
error: internal compiler error: failed to process buffered lint here
 --> ./src/test/ui/lint/lint-qualification.rs:6:36
  |
6 |     let _ = || -> Result<(), ()> { try!(Ok(())); Ok(()) }; // issue #37345
  |                                    ^^^
  |
  = note: delayed at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/compiler/rustc_lint/src/early.rs:393:18

thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler/rustc_errors/src/lib.rs:1011:13
stack backtrace:
   0:     0x7f7812a6dab0 - std::backtrace_rs::backtrace::libunwind::trace::hb4de9797f80b7b8c
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
   1:     0x7f7812a6dab0 - std::backtrace_rs::backtrace::trace_unsynchronized::h59566d0bd20efff7
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f7812a6dab0 - std::sys_common::backtrace::_print_fmt::hcfa5ce6be50275d4
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x7f7812a6dab0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd8c307a38b9bab04
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/sys_common/backtrace.rs:46:22
   4:     0x7f7812adee6c - core::fmt::write::h3868db8542c90941
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/core/src/fmt/mod.rs:1092:17
   5:     0x7f7812a60992 - std::io::Write::write_fmt::hab90295d5a0f197d
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/io/mod.rs:1568:15
   6:     0x7f7812a719a5 - std::sys_common::backtrace::_print::h19224910b8700cf1
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/sys_common/backtrace.rs:49:5
   7:     0x7f7812a719a5 - std::sys_common::backtrace::print::h25dedfa68c5fb84a
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/sys_common/backtrace.rs:36:9
   8:     0x7f7812a719a5 - std::panicking::default_hook::{{closure}}::h12c5765653a72a42
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/panicking.rs:208:50
   9:     0x7f7812a71453 - std::panicking::default_hook::he65cee71c4209f0c
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/panicking.rs:225:9
  10:     0x7f78132d008b - rustc_driver::report_ice::h56d5f6e6a9fb9d03
  11:     0x7f7812a722a6 - std::panicking::rust_panic_with_hook::h01a674d863fe0d8a
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/panicking.rs:595:17
  12:     0x7f7812a71dc7 - std::panicking::begin_panic_handler::{{closure}}::h9b9fecf185178864
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/panicking.rs:497:13
  13:     0x7f7812a6df4c - std::sys_common::backtrace::__rust_end_short_backtrace::h57be46a42dc7f24b
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/sys_common/backtrace.rs:141:18
  14:     0x7f7812a71d29 - rust_begin_unwind
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/panicking.rs:493:5
  15:     0x7f7812a71cdb - std::panicking::begin_panic_fmt::h12277576db89392f
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/panicking.rs:435:5
  16:     0x7f78162d58b3 - rustc_errors::HandlerInner::flush_delayed::he224ed4cfbe0251e
  17:     0x7f78162d4204 - <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop::h746b5a04aaf3b118
  18:     0x7f781563c94b - core::ptr::drop_in_place<rustc_session::parse::ParseSess>::h1ff0f1d7e7ca1d97
  19:     0x7f7815640460 - <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop::hdcdfc88562db0717
  20:     0x7f781563d90d - core::ptr::drop_in_place<rustc_interface::interface::Compiler>::h5bfbd447b11cd14c
  21:     0x7f781563b000 - rustc_span::with_source_map::hd16d211d24c668a9
  22:     0x7f7815641c62 - scoped_tls::ScopedKey<T>::set::h08e96579ac07fec5
  23:     0x7f7815643448 - std::sys_common::backtrace::__rust_begin_short_backtrace::h84dc4b3263d56f8c
  24:     0x7f7815621aba - core::ops::function::FnOnce::call_once{{vtable.shim}}::h209d27a00dc0b7e3
  25:     0x7f7812a82ffa - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h321523073ee11258
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/alloc/src/boxed.rs:1546:9
  26:     0x7f7812a82ffa - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf0e85e12c83b99b3
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/alloc/src/boxed.rs:1546:9
  27:     0x7f7812a82ffa - std::sys::unix::thread::Thread::new::thread_start::hba22c7961aa0e2f8
                               at /rustc/9b471a3f5fe57e5c6e08acf665f2094422415a3d/library/std/src/sys/unix/thread.rs:71:17
  28:     0x7f7812988299 - start_thread
  29:     0x7f781289d153 - clone
  30:                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 1.52.0-nightly (9b471a3f5 2021-02-19) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z unpretty=everybody_loops

query stack during panic:
end of query stack

[matthiaskrgr]

@rustbot modify labels: requires-nightly

[Alexendoo]

The everybody loops pass has been removed - #93913