ICE: parallel compiler: `deadlock detected`

[matthiaskrgr]

Code

you need parallel compiler config to reproduce this!
rustc -Zthreads=300 file.rs

#![feature(generic_const_exprs)]

trait TensorDimension {
    const DIM: usize;
    const ISSCALAR: bool = Self::DIM == 0;
    fn is_scalar(&self) -> bool {
        Self::ISSCALAR
    }
}

trait TensorSize: TensorDimension {
    fn size(&self) -> [usize; Self::DIM];
    fn inbounds(&self, index: [usize; Self::DIM]) -> bool {
        index.iter().zip(self.size().iter()).all(|(i, s)| i < s)
    }
}

trait Broadcastable: TensorSize + Sized {
    type Element;
    fn bget(&self, index: [usize; Self::DIM]) -> Option<Self::Element>;
    fn lazy_updim<const NEWDIM: usize>(
        &self,
        size: [usize; NEWDIM],
    ) -> LazyUpdim<Self, { Self::DIM }, NEWDIM> {
        assert!(
            NEWDIM >= Self::DIM,
            "Updimmed tensor cannot have fewer indices than the initial one."
        ); // const generic bounds on nightly. ( )
        LazyUpdim {
            size,
            reference: &self,
        }
    }
    fn bmap<T, F: Fn(Self::Element) -> T>(&self, foo: F) -> BMap<T, Self, F, { Self::DIM }> {
        BMap {
            reference: self,
            closure: foo,
        }
    }
}

struct LazyUpdim<'a, T: Broadcastable, const OLDDIM: usize, const DIM: usize> {
    size: [usize; DIM],
    reference: &'a T,
}

impl<'a, T: Broadcastable, const DIM: usize> TensorDimension for LazyUpdim<'a, T, { T::DIM }, DIM> {
    const DIM: usize = DIM;
}
impl<'a, T: Broadcastable, const DIM: usize> TensorSize for LazyUpdim<'a, T, { T::DIM }, DIM> {
    fn size(&self) -> [usize; DIM] {
        self.size
    }
}
impl<'a, T: Broadcastable, const DIM: usize> Broadcastable for LazyUpdim<'a, T, { T::DIM }, DIM> {
    type Element = T::Element;
    fn bget(&self, index: [usize; DIM]) -> Option<Self::Element> {
        assert!(DIM >= T::DIM);
        if !self.inbounds(index) {
            return None;
        }
        let size = self.size();
        let newindex: [usize; T::DIM] = Default::default(); //array_init::array_init(|i| if size[i] > 1 {index[i]} else {0});
        self.reference.bget(newindex)
    }
}

struct BMap<'a, R, T: Broadcastable, F: Fn(T::Element) -> R, const DIM: usize> {
    reference: &'a T,
    closure: F,
}

impl<'a, R, T: Broadcastable, F: Fn(T::Element) -> R, const DIM: usize> TensorDimension
    for BMap<'a, R, T, F, DIM>
{
    const DIM: usize = DIM;
}
impl<'a, R, T: Broadcastable, F: Fn(T::Element) -> R, const DIM: usize> TensorSize
    for BMap<'a, R, T, F, DIM>
{
    fn size(&self) -> [usize; DIM] {
        self.reference.size()
    }
}
impl<'a, R, T: Broadcastable, F: Fn(T::Element) -> R, const DIM: usize> Broadcastable
    for BMap<'a, R, T, F, DIM>
{
    type Element = R;
    fn bget(&self, index: [usize; DIM]) -> Option<Self::Element> {
        self.reference.bget(index).map(&self.closure)
    }
}

impl<T> TensorDimension for Vec<T> {
    const DIM: usize = 1;
}
impl<T> TensorSize for Vec<T> {
    fn size(&self) -> [usize; 1] {
        [self.len()]
    }
}
impl<T: Clone> Broadcastable for Vec<T> {
    type Element = T;
    fn bget(&self, index: [usize; 1]) -> Option<T> {
        self.get(index[0]).cloned()
    }
}

fn main() {
    let v = vec![1, 2, 3];
    let bv = v.lazy_updim([3, 4]);
    let bbv = bv.bmap(|x| x * x);

    println!(
        "The size of v is {:?}",
        bbv.bget([0, 2]).expect("Out of bounds.")
    );
}

Meta

rustc --version --verbose:

4a59ba4d54a3ec0d8ea1e82b7eeb5c8b0162de04

Error output

<output>

Backtrace

warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
 --> /home/matthias/vcs/github/glacier2/fixed/83765.rs:1:12
  |
1 | #![feature(generic_const_exprs)]
  |            ^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
  = note: `#[warn(incomplete_features)]` on by default

thread '<unnamed>' panicked at 'assertion failed: found_cycle', /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/job.rs:556:5
stack backtrace:
   0:     0x7f76a530abf6 - std::backtrace_rs::backtrace::libunwind::trace::h74804ffdd8fa53e7
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f76a530abf6 - std::backtrace_rs::backtrace::trace_unsynchronized::h7428ab2b67b36e0c
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f76a530abf6 - std::sys_common::backtrace::_print_fmt::h8de225fa5d864a16
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f76a530abf6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf186862c319ab6b0
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f76a53af698 - core::fmt::rt::Argument::fmt::h6eb98e918eb80ebd
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/fmt/rt.rs:138:9
   5:     0x7f76a53af698 - core::fmt::write::hfa7c5695b2a1784c
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/fmt/mod.rs:1094:21
   6:     0x7f76a53151bf - std::io::Write::write_fmt::h8780fc8b700f7b89
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/io/mod.rs:1712:15
   7:     0x7f76a530a9f5 - std::sys_common::backtrace::_print::h4ce540e460b36e22
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f76a530a9f5 - std::sys_common::backtrace::print::h6954c2242c47d1db
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f76a532bebc - std::panicking::default_hook::{{closure}}::h7efa3c73d7318a2f
  10:     0x7f76a532bb92 - std::panicking::default_hook::h478ef42d51f84426
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:288:9
  11:     0x7f76a7cfe63b - <alloc[32b43e9536c01a3]::boxed::Box<dyn for<'a, 'b> core[c5d5d662f7508502]::ops::function::Fn<(&'a core[c5d5d662f7508502]::panic::panic_info::PanicInfo<'b>,), Output = ()> + core[c5d5d662f7508502]::marker::Send + core[c5d5d662f7508502]::marker::Sync> as core[c5d5d662f7508502]::ops::function::Fn<(&core[c5d5d662f7508502]::panic::panic_info::PanicInfo,)>>::call
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:1999:9
  12:     0x7f76a7cfe63b - rustc_driver_impl[fa47bdc6a12b5fac]::install_ice_hook::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_driver_impl/src/lib.rs:1258:13
  13:     0x7f76a532c75a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hfea6944ca11513b1
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:1999:9
  14:     0x7f76a532c75a - std::panicking::rust_panic_with_hook::h3d7c73761f67633f
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:695:13
  15:     0x7f76a530baa1 - std::panicking::begin_panic_handler::{{closure}}::h0004dd01860b01c3
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:580:13
  16:     0x7f76a530acd6 - std::sys_common::backtrace::__rust_end_short_backtrace::hccbfe31830e0f553
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:150:18
  17:     0x7f76a532c2c2 - rust_begin_unwind
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:578:5
  18:     0x7f76a53cb363 - core::panicking::panic_fmt::h98b1dd38c1edb68b
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:67:14
  19:     0x7f76a53cb3f5 - core::panicking::panic::he5f7c6779e1d5164
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:117:5
  20:     0x7f76a7cce4d4 - rustc_query_system[8ee2d68ce6f1a061]::query::job::deadlock::<rustc_middle[d62e0ab363fca640]::dep_graph::dep_node::DepKind>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/job.rs:556:5
  21:     0x7f76a7d44fad - rustc_interface[f00717bbd5e2d5b3]::util::run_in_thread_pool_with_globals::<rustc_interface[f00717bbd5e2d5b3]::interface::run_compiler<core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>, rustc_driver_impl[fa47bdc6a12b5fac]::run_compiler::{closure#1}>::{closure#0}, core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>>::{closure#1}::{closure#1}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/util.rs:191:35
  22:     0x7f76a7d44fad - std[68c29493de10bea]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[f00717bbd5e2d5b3]::util::run_in_thread_pool_with_globals<rustc_interface[f00717bbd5e2d5b3]::interface::run_compiler<core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>, rustc_driver_impl[fa47bdc6a12b5fac]::run_compiler::{closure#1}>::{closure#0}, core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>>::{closure#1}::{closure#1}, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:134:18
  23:     0x7f76a7cee5c3 - <std[68c29493de10bea]::thread::Builder>::spawn_unchecked_::<rustc_interface[f00717bbd5e2d5b3]::util::run_in_thread_pool_with_globals<rustc_interface[f00717bbd5e2d5b3]::interface::run_compiler<core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>, rustc_driver_impl[fa47bdc6a12b5fac]::run_compiler::{closure#1}>::{closure#0}, core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>>::{closure#1}::{closure#1}, ()>::{closure#1}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/mod.rs:529:17
  24:     0x7f76a7cee5c3 - <core[c5d5d662f7508502]::panic::unwind_safe::AssertUnwindSafe<<std[68c29493de10bea]::thread::Builder>::spawn_unchecked_<rustc_interface[f00717bbd5e2d5b3]::util::run_in_thread_pool_with_globals<rustc_interface[f00717bbd5e2d5b3]::interface::run_compiler<core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>, rustc_driver_impl[fa47bdc6a12b5fac]::run_compiler::{closure#1}>::{closure#0}, core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>>::{closure#1}::{closure#1}, ()>::{closure#1}::{closure#0}> as core[c5d5d662f7508502]::ops::function::FnOnce<()>>::call_once
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panic/unwind_safe.rs:271:9
  25:     0x7f76a7cee5c3 - std[68c29493de10bea]::panicking::try::do_call::<core[c5d5d662f7508502]::panic::unwind_safe::AssertUnwindSafe<<std[68c29493de10bea]::thread::Builder>::spawn_unchecked_<rustc_interface[f00717bbd5e2d5b3]::util::run_in_thread_pool_with_globals<rustc_interface[f00717bbd5e2d5b3]::interface::run_compiler<core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>, rustc_driver_impl[fa47bdc6a12b5fac]::run_compiler::{closure#1}>::{closure#0}, core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>>::{closure#1}::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:485:40
  26:     0x7f76a7cee5c3 - std[68c29493de10bea]::panicking::try::<(), core[c5d5d662f7508502]::panic::unwind_safe::AssertUnwindSafe<<std[68c29493de10bea]::thread::Builder>::spawn_unchecked_<rustc_interface[f00717bbd5e2d5b3]::util::run_in_thread_pool_with_globals<rustc_interface[f00717bbd5e2d5b3]::interface::run_compiler<core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>, rustc_driver_impl[fa47bdc6a12b5fac]::run_compiler::{closure#1}>::{closure#0}, core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>>::{closure#1}::{closure#1}, ()>::{closure#1}::{closure#0}>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:449:19
  27:     0x7f76a7cee5c3 - std[68c29493de10bea]::panic::catch_unwind::<core[c5d5d662f7508502]::panic::unwind_safe::AssertUnwindSafe<<std[68c29493de10bea]::thread::Builder>::spawn_unchecked_<rustc_interface[f00717bbd5e2d5b3]::util::run_in_thread_pool_with_globals<rustc_interface[f00717bbd5e2d5b3]::interface::run_compiler<core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>, rustc_driver_impl[fa47bdc6a12b5fac]::run_compiler::{closure#1}>::{closure#0}, core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>>::{closure#1}::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panic.rs:140:14
  28:     0x7f76a7cee5c3 - <std[68c29493de10bea]::thread::Builder>::spawn_unchecked_::<rustc_interface[f00717bbd5e2d5b3]::util::run_in_thread_pool_with_globals<rustc_interface[f00717bbd5e2d5b3]::interface::run_compiler<core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>, rustc_driver_impl[fa47bdc6a12b5fac]::run_compiler::{closure#1}>::{closure#0}, core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>>::{closure#1}::{closure#1}, ()>::{closure#1}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/mod.rs:528:30
  29:     0x7f76a7cee5c3 - <<std[68c29493de10bea]::thread::Builder>::spawn_unchecked_<rustc_interface[f00717bbd5e2d5b3]::util::run_in_thread_pool_with_globals<rustc_interface[f00717bbd5e2d5b3]::interface::run_compiler<core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>, rustc_driver_impl[fa47bdc6a12b5fac]::run_compiler::{closure#1}>::{closure#0}, core[c5d5d662f7508502]::result::Result<(), rustc_span[9849ed9ca8d6c267]::ErrorGuaranteed>>::{closure#1}::{closure#1}, ()>::{closure#1} as core[c5d5d662f7508502]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/ops/function.rs:250:5
  30:     0x7f76a531d69a - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h59b61553bfddebc8
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:1985:9
  31:     0x7f76a531d69a - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h0ce3d7a7bade6491
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:1985:9
  32:     0x7f76a5303b15 - std::sys::unix::thread::Thread::new::thread_start::h6e446945f062d041
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys/unix/thread.rs:108:17
  33:     0x7f76a50a6bb5 - <unknown>
  34:     0x7f76a5128d90 - <unknown>
  35:                0x0 - <unknown>

error: 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 1.71.0-dev running on x86_64-unknown-linux-gnu

note: compiler flags: -Z threads=300

query stack during panic:
end of query stack
deadlock handler panicked, aborting process
[1]    1559687 IOT instruction  ~/.rustup/toolchains/local-debug-assertions/bin/rustc -Zthreads=300

[Zoxc]

I wasn't able to reproduce this locally. What OS and CPU did you use?

[matthiaskrgr]

AMD Ryzen 7 PRO 5850U, manjaro.

[matthiaskrgr]

tried again on top of a8b905c
-Zthreads=100 no crash

500 threads:

warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
 --> query.rs:1:12
  |
1 | #![feature(generic_const_exprs)]
  |            ^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
  = note: `#[warn(incomplete_features)]` on by default

thread 'rustc' panicked at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:111:50:
no ImplicitCtxt stored in tls
stack backtrace:
   0:     0x7fb079542521 - std::backtrace_rs::backtrace::libunwind::trace::h818fd7fcd2897c6b
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fb079542521 - std::backtrace_rs::backtrace::trace_unsynchronized::hf2d8941579cdb3be
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fb079542521 - std::sys_common::backtrace::_print_fmt::he4a494b921534d89
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x7fb079542521 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h5a3fdc94d861e4aa
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7fb0795b5107 - core::fmt::rt::Argument::fmt::h4a90583b766ae427
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/fmt/rt.rs:138:9
   5:     0x7fb0795b5107 - core::fmt::write::h6089469c4b40ae1f
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/fmt/mod.rs:1094:21
   6:     0x7fb07951fc05 - std::io::Write::write_fmt::h897693c3d30f01da
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/io/mod.rs:1714:15
   7:     0x7fb0795422f4 - std::sys_common::backtrace::_print::hb4dbec298bba652d
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7fb0795422f4 - std::sys_common::backtrace::print::h9ddc492b2d8467df
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7fb07954e52f - std::panicking::panic_hook_with_disk_dump::{{closure}}::h940f867d76beae55
  10:     0x7fb07954e17b - std::panicking::panic_hook_with_disk_dump::h5e02febb31a69553
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:312:9
  11:     0x7fb07c272e50 - rustc_driver_impl[4568f96111937b4e]::install_ice_hook::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_driver_impl/src/lib.rs:1335:13
  12:     0x7fb07954ee78 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h05114cf4e5ed0f4a
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2021:9
  13:     0x7fb07954ee78 - std::panicking::rust_panic_with_hook::h40904d4b98be6c90
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:733:13
  14:     0x7fb0795429c7 - std::panicking::begin_panic_handler::{{closure}}::h0b4db4639685b376
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:621:13
  15:     0x7fb0795427b6 - std::sys_common::backtrace::__rust_end_short_backtrace::hcbd9c82d981610ed
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:170:18
  16:     0x7fb07954e9e2 - rust_begin_unwind
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:617:5
  17:     0x7fb0795d8093 - core::panicking::panic_fmt::h6c5efd4701442ee1
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:67:14
  18:     0x7fb0795ca643 - core::panicking::panic_display::h0f2d417e65e65824
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:150:5
  19:     0x7fb0795ca643 - core::panicking::panic_str::hd0db241aef08908a
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:134:5
  20:     0x7fb0795ca643 - core::option::expect_failed::h03990d99f8383cfa
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/option.rs:1988:5
  21:     0x7fb07c29bb1e - <core[eb9f5097525910b2]::option::Option<&rustc_middle[fea86db987f6b164]::ty::context::tls::ImplicitCtxt>>::expect
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/option.rs:898:21
  22:     0x7fb07c29bb1e - rustc_middle[fea86db987f6b164]::ty::context::tls::with_context::<rustc_middle[fea86db987f6b164]::ty::context::tls::with<rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#1}::{closure#0}, std[81a1ea1164486f60]::collections::hash::map::HashMap<rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobId, rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobInfo<rustc_middle[fea86db987f6b164]::dep_graph::dep_node::DepKind>, core[eb9f5097525910b2]::hash::BuildHasherDefault<rustc_hash[35e421d9c6bcb220]::FxHasher>>>::{closure#0}, std[81a1ea1164486f60]::collections::hash::map::HashMap<rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobId, rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobInfo<rustc_middle[fea86db987f6b164]::dep_graph::dep_node::DepKind>, core[eb9f5097525910b2]::hash::BuildHasherDefault<rustc_hash[35e421d9c6bcb220]::FxHasher>>>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:111:50
  23:     0x7fb07c29bb1e - rustc_middle[fea86db987f6b164]::ty::context::tls::with_context_opt::<rustc_middle[fea86db987f6b164]::ty::context::tls::with_context<rustc_middle[fea86db987f6b164]::ty::context::tls::with<rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#1}::{closure#0}, std[81a1ea1164486f60]::collections::hash::map::HashMap<rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobId, rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobInfo<rustc_middle[fea86db987f6b164]::dep_graph::dep_node::DepKind>, core[eb9f5097525910b2]::hash::BuildHasherDefault<rustc_hash[35e421d9c6bcb220]::FxHasher>>>::{closure#0}, std[81a1ea1164486f60]::collections::hash::map::HashMap<rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobId, rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobInfo<rustc_middle[fea86db987f6b164]::dep_graph::dep_node::DepKind>, core[eb9f5097525910b2]::hash::BuildHasherDefault<rustc_hash[35e421d9c6bcb220]::FxHasher>>>::{closure#0}, std[81a1ea1164486f60]::collections::hash::map::HashMap<rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobId, rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobInfo<rustc_middle[fea86db987f6b164]::dep_graph::dep_node::DepKind>, core[eb9f5097525910b2]::hash::BuildHasherDefault<rustc_hash[35e421d9c6bcb220]::FxHasher>>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:94:9
  24:     0x7fb07c29bb1e - rustc_middle[fea86db987f6b164]::ty::context::tls::with_context::<rustc_middle[fea86db987f6b164]::ty::context::tls::with<rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#1}::{closure#0}, std[81a1ea1164486f60]::collections::hash::map::HashMap<rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobId, rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobInfo<rustc_middle[fea86db987f6b164]::dep_graph::dep_node::DepKind>, core[eb9f5097525910b2]::hash::BuildHasherDefault<rustc_hash[35e421d9c6bcb220]::FxHasher>>>::{closure#0}, std[81a1ea1164486f60]::collections::hash::map::HashMap<rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobId, rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobInfo<rustc_middle[fea86db987f6b164]::dep_graph::dep_node::DepKind>, core[eb9f5097525910b2]::hash::BuildHasherDefault<rustc_hash[35e421d9c6bcb220]::FxHasher>>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  25:     0x7fb07c29bb1e - rustc_middle[fea86db987f6b164]::ty::context::tls::with::<rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#1}::{closure#0}, std[81a1ea1164486f60]::collections::hash::map::HashMap<rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobId, rustc_query_system[ca0fea7cc8dea863]::query::job::QueryJobInfo<rustc_middle[fea86db987f6b164]::dep_graph::dep_node::DepKind>, core[eb9f5097525910b2]::hash::BuildHasherDefault<rustc_hash[35e421d9c6bcb220]::FxHasher>>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:144:5
  26:     0x7fb07c29bb1e - rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals::<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#1}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/util.rs:194:29
  27:     0x7fb07b41b5f3 - <alloc[1e1169ea88a5754b]::boxed::Box<dyn core[eb9f5097525910b2]::ops::function::Fn<(), Output = ()> + core[eb9f5097525910b2]::marker::Sync + core[eb9f5097525910b2]::marker::Send> as core[eb9f5097525910b2]::ops::function::Fn<()>>::call
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2021:9
  28:     0x7fb07b41b5f3 - <rayon_core[866e6d114bbe24dc]::sleep::SleepData>::deadlock_check
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rustc-rayon-core-0.5.0/src/sleep/mod.rs:37:13
  29:     0x7fb07b41b5f3 - <rayon_core[866e6d114bbe24dc]::sleep::Sleep>::sleep
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rustc-rayon-core-0.5.0/src/sleep/mod.rs:273:17
  30:     0x7fb07b4097e1 - <rayon_core[866e6d114bbe24dc]::sleep::Sleep>::no_work_found
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rustc-rayon-core-0.5.0/src/sleep/mod.rs:178:13
  31:     0x7fb07b4097e1 - <rayon_core[866e6d114bbe24dc]::registry::WorkerThread>::wait_until_cold
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rustc-rayon-core-0.5.0/src/registry.rs:865:17
  32:     0x7fb07b406947 - <rayon_core[866e6d114bbe24dc]::registry::WorkerThread>::wait_until::<rayon_core[866e6d114bbe24dc]::latch::CountLatch>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rustc-rayon-core-0.5.0/src/registry.rs:845:13
  33:     0x7fb07b406947 - rayon_core[866e6d114bbe24dc]::registry::main_loop
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rustc-rayon-core-0.5.0/src/registry.rs:991:5
  34:     0x7fb07b406947 - <rayon_core[866e6d114bbe24dc]::registry::ThreadBuilder>::run
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rustc-rayon-core-0.5.0/src/registry.rs:55:18
  35:     0x7fb07c29becc - rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals::<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#2}::{closure#0}::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/util.rs:219:82
  36:     0x7fb07c29becc - <scoped_tls[f1946ba771c70e9e]::ScopedKey<rustc_span[5060e7939b3129d]::SessionGlobals>>::set::<rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#2}::{closure#0}::{closure#0}::{closure#0}, ()>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  37:     0x7fb07c29becc - rustc_span[5060e7939b3129d]::set_session_globals_then::<(), rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#2}::{closure#0}::{closure#0}::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_span/src/lib.rs:131:5
  38:     0x7fb07c29becc - rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals::<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#2}::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/util.rs:219:25
  39:     0x7fb07c29becc - <rayon_core[866e6d114bbe24dc]::ThreadPoolBuilder>::build_scoped::<rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#2}::{closure#0}::{closure#0}, rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#2}::{closure#0}::{closure#1}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#0}::{closure#0}::{closure#0}
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rustc-rayon-core-0.5.0/src/lib.rs:363:44
  40:     0x7fb07c29becc - <crossbeam_utils[1a211ea2fd6596cc]::thread::ScopedThreadBuilder>::spawn::<<rayon_core[866e6d114bbe24dc]::ThreadPoolBuilder>::build_scoped<rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#2}::{closure#0}::{closure#0}, rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#2}::{closure#0}::{closure#1}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#0}::{closure#0}::{closure#0}, ()>::{closure#0}
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-utils-0.8.16/src/thread.rs:440:31
  41:     0x7fb07c29becc - <<crossbeam_utils[1a211ea2fd6596cc]::thread::ScopedThreadBuilder>::spawn<<rayon_core[866e6d114bbe24dc]::ThreadPoolBuilder>::build_scoped<rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#2}::{closure#0}::{closure#0}, rustc_interface[68ad2e073643408d]::util::run_in_thread_pool_with_globals<rustc_interface[68ad2e073643408d]::interface::run_compiler<core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>, rustc_driver_impl[4568f96111937b4e]::run_compiler::{closure#1}>::{closure#0}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#2}::{closure#0}::{closure#1}, core[eb9f5097525910b2]::result::Result<(), rustc_span[5060e7939b3129d]::ErrorGuaranteed>>::{closure#0}::{closure#0}::{closure#0}, ()>::{closure#0} as core[eb9f5097525910b2]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/ops/function.rs:250:5
  42:     0x7fb07c2457fe - <alloc[1e1169ea88a5754b]::boxed::Box<dyn core[eb9f5097525910b2]::ops::function::FnOnce<(), Output = ()> + core[eb9f5097525910b2]::marker::Send> as core[eb9f5097525910b2]::ops::function::FnOnce<()>>::call_once
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2007:9
  43:     0x7fb07c2457fe - std[81a1ea1164486f60]::sys_common::backtrace::__rust_begin_short_backtrace::<alloc[1e1169ea88a5754b]::boxed::Box<dyn core[eb9f5097525910b2]::ops::function::FnOnce<(), Output = ()> + core[eb9f5097525910b2]::marker::Send>, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:154:18
  44:     0x7fb07c245b5c - <std[81a1ea1164486f60]::thread::Builder>::spawn_unchecked_::<alloc[1e1169ea88a5754b]::boxed::Box<dyn core[eb9f5097525910b2]::ops::function::FnOnce<(), Output = ()> + core[eb9f5097525910b2]::marker::Send>, ()>::{closure#1}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/mod.rs:529:17
  45:     0x7fb07c245b5c - <core[eb9f5097525910b2]::panic::unwind_safe::AssertUnwindSafe<<std[81a1ea1164486f60]::thread::Builder>::spawn_unchecked_<alloc[1e1169ea88a5754b]::boxed::Box<dyn core[eb9f5097525910b2]::ops::function::FnOnce<(), Output = ()> + core[eb9f5097525910b2]::marker::Send>, ()>::{closure#1}::{closure#0}> as core[eb9f5097525910b2]::ops::function::FnOnce<()>>::call_once
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panic/unwind_safe.rs:271:9
  46:     0x7fb07c245b5c - std[81a1ea1164486f60]::panicking::try::do_call::<core[eb9f5097525910b2]::panic::unwind_safe::AssertUnwindSafe<<std[81a1ea1164486f60]::thread::Builder>::spawn_unchecked_<alloc[1e1169ea88a5754b]::boxed::Box<dyn core[eb9f5097525910b2]::ops::function::FnOnce<(), Output = ()> + core[eb9f5097525910b2]::marker::Send>, ()>::{closure#1}::{closure#0}>, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:524:40
  47:     0x7fb07c245b5c - std[81a1ea1164486f60]::panicking::try::<(), core[eb9f5097525910b2]::panic::unwind_safe::AssertUnwindSafe<<std[81a1ea1164486f60]::thread::Builder>::spawn_unchecked_<alloc[1e1169ea88a5754b]::boxed::Box<dyn core[eb9f5097525910b2]::ops::function::FnOnce<(), Output = ()> + core[eb9f5097525910b2]::marker::Send>, ()>::{closure#1}::{closure#0}>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:488:19
  48:     0x7fb07c245b5c - std[81a1ea1164486f60]::panic::catch_unwind::<core[eb9f5097525910b2]::panic::unwind_safe::AssertUnwindSafe<<std[81a1ea1164486f60]::thread::Builder>::spawn_unchecked_<alloc[1e1169ea88a5754b]::boxed::Box<dyn core[eb9f5097525910b2]::ops::function::FnOnce<(), Output = ()> + core[eb9f5097525910b2]::marker::Send>, ()>::{closure#1}::{closure#0}>, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panic.rs:142:14
  49:     0x7fb07c245b5c - <std[81a1ea1164486f60]::thread::Builder>::spawn_unchecked_::<alloc[1e1169ea88a5754b]::boxed::Box<dyn core[eb9f5097525910b2]::ops::function::FnOnce<(), Output = ()> + core[eb9f5097525910b2]::marker::Send>, ()>::{closure#1}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/mod.rs:528:30
  50:     0x7fb07c245b5c - <<std[81a1ea1164486f60]::thread::Builder>::spawn_unchecked_<alloc[1e1169ea88a5754b]::boxed::Box<dyn core[eb9f5097525910b2]::ops::function::FnOnce<(), Output = ()> + core[eb9f5097525910b2]::marker::Send>, ()>::{closure#1} as core[eb9f5097525910b2]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/ops/function.rs:250:5
  51:     0x7fb079540439 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h197d07c7abf2c25e
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2007:9
  52:     0x7fb079540439 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hcb59e37a449b5256
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2007:9
  53:     0x7fb07954f895 - std::sys::unix::thread::Thread::new::thread_start::h699f0086e43bdec6
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys/unix/thread.rs:108:17
  54:     0x7fb07908c9eb - <unknown>
  55:     0x7fb079110ebc - <unknown>
  56:                0x0 - <unknown>

error: 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: please attach the file at `/tmp/im/rustc-ice-2023-08-25T18:28:01.910217331Z-3306311.txt` to your bug report

note: compiler flags: -Z threads=500

query stack during panic:
end of query stack
Rayon: detected unexpected panic; aborting
[1]    3306311 IOT instruction  ~/.rustup/toolchains/local-debug-assertions/bin/rustc query.rs -Zthreads=500

or

warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
 --> query.rs:1:12
  |
1 | #![feature(generic_const_exprs)]
  |            ^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
  = note: `#[warn(incomplete_features)]` on by default

/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/librustc_driver-6e11478028aeb5df.so(+0x2a81583)[0x7fd694281583]
/usr/lib/libc.so.6(+0x3e710)[0x7fd69103e710]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/librustc_driver-6e11478028aeb5df.so(+0x48e202a)[0x7fd6960e202a]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/librustc_driver-6e11478028aeb5df.so(+0x460b8d1)[0x7fd695e0b8d1]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/librustc_driver-6e11478028aeb5df.so(+0x4aaf69a)[0x7fd6962af69a]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/librustc_driver-6e11478028aeb5df.so(+0x2a9ba06)[0x7fd69429ba06]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/librustc_driver-6e11478028aeb5df.so(+0x1c1b5f3)[0x7fd69341b5f3]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/librustc_driver-6e11478028aeb5df.so(_RNvMs8_NtCsbxzE27LtKPw_10rayon_core8registryNtB5_12WorkerThread15wait_until_cold+0x1f1)[0x7fd6934097e1]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/librustc_driver-6e11478028aeb5df.so(_RNvMNtCsbxzE27LtKPw_10rayon_core8registryNtB2_13ThreadBuilder3run+0x167)[0x7fd693406947]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/librustc_driver-6e11478028aeb5df.so(+0x2a9becc)[0x7fd69429becc]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/librustc_driver-6e11478028aeb5df.so(+0x2a457fe)[0x7fd6942457fe]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/librustc_driver-6e11478028aeb5df.so(+0x2a45b5c)[0x7fd694245b5c]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/libstd-82834f3319f1342f.so(rust_metadata_std_81a1ea1164486f60+0x140439)[0x7fd691540439]
/home/matthias/.rustup/toolchains/local-debug-assertions/bin/../lib/libstd-82834f3319f1342f.so(rust_metadata_std_81a1ea1164486f60+0x14f895)[0x7fd69154f895]
/usr/lib/libc.so.6(+0x8c9eb)[0x7fd69108c9eb]
/usr/lib/libc.so.6(+0x110ebc)[0x7fd691110ebc]
[1]    3306831 segmentation fault  ~/.rustup/toolchains/local-debug-assertions/bin/rustc query.rs -Zthreads=500

[Zoxc]

Could you try on top of #115220, which fixes that particular panic?

[matthiaskrgr]

Seems to be fixed with your missing-cycle-test branch