Repeatable rustc sigsegv crash

[darthdeus]

I tried a clean build multiple times, it always crashes on a different crate, but with a seemingly same error. Fixed after updating to latest nightly, but still reporting in case it's relevant.

Code

I don't have a small code example, but the whole project is OSS and it keeps crashing even when I do cargo clean, at this commit darthdeus/comfy@a69821d

Meta

rustc --version --verbose:

rustc 1.74.0-nightly (0288f2e19 2023-09-25)
binary: rustc
commit-hash: 0288f2e1955b154262e0669ec5f7bb9a4c6cf5aa
commit-date: 2023-09-25
host: x86_64-unknown-linux-gnu
release: 1.74.0-nightly
LLVM version: 17.0.0

After rustup update it stopped happening

   nightly-x86_64-unknown-linux-gnu updated - rustc 1.74.0-nightly (e7c502d93 2023-09-27) (from rustc 1.74.0-nightly (0288f2e19 2023-09-25))

Error output

error: rustc interrupted by SIGSEGV, printing backtrace

/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-6fb72141db78b514.so(+0x30f0156)[0x7f34320f0156]
/usr/lib/libc.so.6(+0x3e710)[0x7f342ec3e710]
/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/libLLVM-17-rust-1.74.0-nightly.so(+0x609509b)[0x7f342d29509b]
/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/libLLVM-17-rust-1.74.0-nightly.so(_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE+0x1408)[0x7f342d1b2424]
/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/libLLVM-17-rust-1.74.0-nightly.so(_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE+0x266)[0x7f342d5b5a2c]
/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-6fb72141db78b514.so(+0x2706926)[0x7f3431706926]
/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-6fb72141db78b514.so(+0x27057d8)[0x7f34317057d8]
/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-6fb72141db78b514.so(+0x270411c)[0x7f343170411c]
/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-6fb72141db78b514.so(+0x261b7f8)[0x7f343161b7f8]
/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-6fb72141db78b514.so(+0x26191ac)[0x7f34316191ac]
/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-6fb72141db78b514.so(+0x26088f6)[0x7f34316088f6]
/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/libstd-4aa9c5361fb5e968.so(rust_metadata_std_c0c5954477cb1558+0x10a2d5)[0x7f342ef722d5]
/usr/lib/libc.so.6(+0x8c9eb)[0x7f342ec8c9eb]
/usr/lib/libc.so.6(+0x110dfc)[0x7f342ed10dfc]

note: we would appreciate a report at https://github.com/rust-lang/rust
error: could not compile `wgpu` (lib)

Caused by:
  process didn't exit successfully: `/home/darth/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/rustc --crate-name wgpu --edition=2021 /home/darth/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-0.16.3/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=147 --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no -C debuginfo=2 -C debug-assertions=on --cfg 'feature="default"' --cfg 'feature="expose-ids"' --cfg 'feature="wgsl"' -C metadata=b2410f259330f375 -C extra-filename=-b2410f259330f375 --out-dir /home/darth/projects/comfy/target/debug/deps -C linker=clang -L dependency=/home/darth/projects/comfy/target/debug/deps --extern arrayvec=/home/darth/projects/comfy/target/debug/deps/libarrayvec-367778a3aadf580a.rmeta --extern cfg_if=/home/darth/projects/comfy/target/debug/deps/libcfg_if-498469d5bcd7a385.rmeta --extern log=/home/darth/projects/comfy/target/debug/deps/liblog-4c84c92027bca2c8.rmeta --extern parking_lot=/home/darth/projects/comfy/target/debug/deps/libparking_lot-0879d7b3413cf3ad.rmeta --extern profiling=/home/darth/projects/comfy/target/debug/deps/libprofiling-3f8cf0888ee03f90.rmeta --extern raw_window_handle=/home/darth/projects/comfy/target/debug/deps/libraw_window_handle-57270b0f8da3f9cd.rmeta --extern smallvec=/home/darth/projects/comfy/target/debug/deps/libsmallvec-1898cbb2da0bcf5c.rmeta --extern static_assertions=/home/darth/projects/comfy/target/debug/deps/libstatic_assertions-ea8e8728acdd08e1.rmeta --extern wgc=/home/darth/projects/comfy/target/debug/deps/libwgpu_core-b45b2862c6302c35.rmeta --extern hal=/home/darth/projects/comfy/target/debug/deps/libwgpu_hal-da2b7722a1e4c934.rmeta --extern wgt=/home/darth/projects/comfy/target/debug/deps/libwgpu_types-435b69cfad33328c.rmeta --cap-lints allow -Clink-arg=-fuse-ld=mold -Clink-arg=-fuse-ld=mold -Zshare-generics=y` (signal: 11, SIGSEGV: invalid memory reference)

Backtrace

No backtrace in the error

[darthdeus]

Okay so turns out this isn't actually fixed on latest nightly, and I'm getting a crash even on stable, though different one

rustc version:

rustc 1.72.1 (d5c2e9c34 2023-09-13)
binary: rustc
commit-hash: d5c2e9c342b358556da91d61ed4133f6f50fc0c3
commit-date: 2023-09-13
host: x86_64-unknown-linux-gnu
release: 1.72.1
LLVM version: 16.0.5

stacktrace

thread 'rustc' panicked at 'Normalizing Binder { value: TraitPredicate(<token::MinusEq as std::marker::Copy>, polarity:Positive), bound_vars: [] } without wrapping in a `Binder`', compiler/rustc_trait_selection/src/traits/project.rs:484:9
stack backtrace:
   0:     0x7f7efa962b51 - std::backtrace_rs::backtrace::libunwind::trace::h66dc1c6acf794faa
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f7efa962b51 - std::backtrace_rs::backtrace::trace_unsynchronized::ha80d20099a67f790
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f7efa962b51 - std::sys_common::backtrace::_print_fmt::h7b959d43f35f16d4
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f7efa962b51 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hdaa196410d9ee0b9
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f7efa9c96ff - core::fmt::rt::Argument::fmt::h0ddfbbe8be3f80d0
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/core/src/fmt/rt.rs:138:9
   5:     0x7f7efa9c96ff - core::fmt::write::h66b3c629f3d623e4
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/core/src/fmt/mod.rs:1094:21
   6:     0x7f7efa955497 - std::io::Write::write_fmt::hb6d80fba4115e0c2
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/io/mod.rs:1714:15
   7:     0x7f7efa962965 - std::sys_common::backtrace::_print::h1a49cfb0cf3cce17
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f7efa962965 - std::sys_common::backtrace::print::hca95c2d0055e42a2
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f7efa965743 - std::panicking::default_hook::{{closure}}::hc03c01c56bca600c
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/panicking.rs:269:22
  10:     0x7f7efa9654d4 - std::panicking::default_hook::hb2cb5315b6634f1c
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/panicking.rs:288:9
  11:     0x7f7efdc6b60b - rustc_driver_impl[e91af841be79713a]::install_ice_hook::{closure#0}
  12:     0x7f7efa965f6e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb3a915ffd78277c6
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/alloc/src/boxed.rs:2007:9
  13:     0x7f7efa965f6e - std::panicking::rust_panic_with_hook::h75cd912a39a34e8a
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/panicking.rs:709:13
  14:     0x7f7efa965cf7 - std::panicking::begin_panic_handler::{{closure}}::h1498b46f7849e167
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/panicking.rs:597:13
  15:     0x7f7efa962fb6 - std::sys_common::backtrace::__rust_end_short_backtrace::hd36a39b27b98086b
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/sys_common/backtrace.rs:151:18
  16:     0x7f7efa965a42 - rust_begin_unwind
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/panicking.rs:593:5
  17:     0x7f7efa9c5973 - core::panicking::panic_fmt::h98ef273141454c23
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/core/src/panicking.rs:67:14
  18:     0x7f7efc41667a - rustc_trait_selection[3138a3dd55bba726]::traits::project::normalize_with_depth_to::<rustc_middle[fbd75b4db2cdb7e6]::ty::Clause>
  19:     0x7f7efc40770d - <rustc_trait_selection[3138a3dd55bba726]::traits::select::SelectionContext>::confirm_candidate
  20:     0x7f7efc400d2c - <rustc_trait_selection[3138a3dd55bba726]::traits::select::SelectionContext>::evaluate_stack
  21:     0x7f7efc3ff531 - <rustc_query_system[8b63fd0ca5778b73]::dep_graph::graph::DepGraph<rustc_middle[fbd75b4db2cdb7e6]::dep_graph::dep_node::DepKind>>::with_anon_task::<rustc_middle[fbd75b4db2cdb7e6]::ty::context::TyCtxt, <rustc_trait_selection[3138a3dd55bba726]::traits::select::SelectionContext>::in_task<<rustc_trait_selection[3138a3dd55bba726]::traits::select::SelectionContext>::evaluate_trait_predicate_recursively::{closure#0}::{closure#2}, core[63ccc595abf60ca6]::result::Result<rustc_middle[fbd75b4db2cdb7e6]::traits::select::EvaluationResult, rustc_middle[fbd75b4db2cdb7e6]::traits::select::OverflowError>>::{closure#0}, core[63ccc595abf60ca6]::result::Result<rustc_middle[fbd75b4db2cdb7e6]::traits::select::EvaluationResult, rustc_middle[fbd75b4db2cdb7e6]::traits::select::OverflowError>>
  22:     0x7f7efc8e94f9 - <rustc_trait_selection[3138a3dd55bba726]::traits::select::SelectionContext>::evaluate_predicate_recursively
  23:     0x7f7efc8e6e72 - rustc_traits[f424873cca92f5b0]::evaluate_obligation::evaluate_obligation
  24:     0x7f7efbc33b52 - rustc_query_impl[e7af9ba2ee20c49a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7af9ba2ee20c49a]::query_impl::evaluate_obligation::dynamic_query::{closure#2}::{closure#0}, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 2usize]>>
  25:     0x7f7efc1526a9 - rustc_query_system[8b63fd0ca5778b73]::query::plumbing::try_execute_query::<rustc_query_impl[e7af9ba2ee20c49a]::DynamicConfig<rustc_query_system[8b63fd0ca5778b73]::query::caches::DefaultCache<rustc_middle[fbd75b4db2cdb7e6]::infer::canonical::Canonical<rustc_middle[fbd75b4db2cdb7e6]::ty::ParamEnvAnd<rustc_middle[fbd75b4db2cdb7e6]::ty::Predicate>>, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 2usize]>>, false, false, false>, rustc_query_impl[e7af9ba2ee20c49a]::plumbing::QueryCtxt, false>
  26:     0x7f7efc15231e - rustc_query_impl[e7af9ba2ee20c49a]::query_impl::evaluate_obligation::get_query_non_incr::__rust_end_short_backtrace
  27:     0x7f7efc7173b2 - <rustc_infer[6b15ce7be333e870]::infer::InferCtxt as rustc_trait_selection[3138a3dd55bba726]::traits::query::evaluate_obligation::InferCtxtExt>::evaluate_obligation_no_overflow
  28:     0x7f7efc758171 - rustc_ty_utils[8851e9135c36c69d]::common_traits::is_item_raw
  29:     0x7f7efbc34e8b - rustc_query_impl[e7af9ba2ee20c49a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7af9ba2ee20c49a]::query_impl::is_copy_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 1usize]>>
  30:     0x7f7efc208521 - rustc_query_system[8b63fd0ca5778b73]::query::plumbing::try_execute_query::<rustc_query_impl[e7af9ba2ee20c49a]::DynamicConfig<rustc_query_system[8b63fd0ca5778b73]::query::caches::DefaultCache<rustc_middle[fbd75b4db2cdb7e6]::ty::ParamEnvAnd<rustc_middle[fbd75b4db2cdb7e6]::ty::Ty>, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[e7af9ba2ee20c49a]::plumbing::QueryCtxt, false>
  31:     0x7f7efc208202 - rustc_query_impl[e7af9ba2ee20c49a]::query_impl::is_copy_raw::get_query_non_incr::__rust_end_short_backtrace
  32:     0x7f7efc1e9630 - rustc_ty_utils[8851e9135c36c69d]::needs_drop::needs_drop_raw
  33:     0x7f7efbc354e6 - rustc_query_impl[e7af9ba2ee20c49a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7af9ba2ee20c49a]::query_impl::needs_drop_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 1usize]>>
  34:     0x7f7efc2084fd - rustc_query_system[8b63fd0ca5778b73]::query::plumbing::try_execute_query::<rustc_query_impl[e7af9ba2ee20c49a]::DynamicConfig<rustc_query_system[8b63fd0ca5778b73]::query::caches::DefaultCache<rustc_middle[fbd75b4db2cdb7e6]::ty::ParamEnvAnd<rustc_middle[fbd75b4db2cdb7e6]::ty::Ty>, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[e7af9ba2ee20c49a]::plumbing::QueryCtxt, false>
  35:     0x7f7efd5a74d2 - rustc_query_impl[e7af9ba2ee20c49a]::query_impl::needs_drop_raw::get_query_non_incr::__rust_end_short_backtrace
  36:     0x7f7efc15511b - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::as_temp_inner
  37:     0x7f7efc1764fa - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::as_operand
  38:     0x7f7efc16cae8 - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::as_call_operand
  39:     0x7f7efc16d7b6 - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::as_call_operand
  40:     0x7f7efc15c2ac - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  41:     0x7f7efc15bc2d - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  42:     0x7f7efc18e2de - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::ast_block_stmts
  43:     0x7f7efc180553 - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::ast_block
  44:     0x7f7efc15caee - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  45:     0x7f7efc15bc2d - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  46:     0x7f7efc15bc2d - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  47:     0x7f7efc15e832 - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  48:     0x7f7efc15bc2d - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  49:     0x7f7efc15bc2d - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  50:     0x7f7efc160552 - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  51:     0x7f7efc15bc2d - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  52:     0x7f7efc18e2de - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::ast_block_stmts
  53:     0x7f7efc180553 - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::ast_block
  54:     0x7f7efc15caee - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  55:     0x7f7efc15bc2d - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  56:     0x7f7efc15bc2d - <rustc_mir_build[27734f44a2fa3243]::build::Builder>::expr_into_dest
  57:     0x7f7efcc676c7 - rustc_mir_build[27734f44a2fa3243]::build::mir_built
  58:     0x7f7efbc69c9c - rustc_query_impl[e7af9ba2ee20c49a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7af9ba2ee20c49a]::query_impl::mir_built::dynamic_query::{closure#2}::{closure#0}, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 8usize]>>
  59:     0x7f7efbc69c7e - <rustc_query_impl[e7af9ba2ee20c49a]::query_impl::mir_built::dynamic_query::{closure#2} as core[63ccc595abf60ca6]::ops::function::FnOnce<(rustc_middle[fbd75b4db2cdb7e6]::ty::context::TyCtxt, rustc_span[ca0c6fb73220b455]::def_id::LocalDefId)>>::call_once
  60:     0x7f7efbd72c1d - rustc_query_system[8b63fd0ca5778b73]::query::plumbing::try_execute_query::<rustc_query_impl[e7af9ba2ee20c49a]::DynamicConfig<rustc_query_system[8b63fd0ca5778b73]::query::caches::VecCache<rustc_span[ca0c6fb73220b455]::def_id::LocalDefId, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e7af9ba2ee20c49a]::plumbing::QueryCtxt, false>
  61:     0x7f7efd5dd761 - rustc_query_impl[e7af9ba2ee20c49a]::query_impl::mir_built::get_query_non_incr::__rust_end_short_backtrace
  62:     0x7f7efce3dc81 - rustc_mir_transform[c8b849373fa8c7e7]::check_unsafety::unsafety_check_result
  63:     0x7f7efbc69cdc - rustc_query_impl[e7af9ba2ee20c49a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7af9ba2ee20c49a]::query_impl::unsafety_check_result::dynamic_query::{closure#2}::{closure#0}, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 8usize]>>
  64:     0x7f7efbc69cbe - <rustc_query_impl[e7af9ba2ee20c49a]::query_impl::unsafety_check_result::dynamic_query::{closure#2} as core[63ccc595abf60ca6]::ops::function::FnOnce<(rustc_middle[fbd75b4db2cdb7e6]::ty::context::TyCtxt, rustc_span[ca0c6fb73220b455]::def_id::LocalDefId)>>::call_once
  65:     0x7f7efbd72c1d - rustc_query_system[8b63fd0ca5778b73]::query::plumbing::try_execute_query::<rustc_query_impl[e7af9ba2ee20c49a]::DynamicConfig<rustc_query_system[8b63fd0ca5778b73]::query::caches::VecCache<rustc_span[ca0c6fb73220b455]::def_id::LocalDefId, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e7af9ba2ee20c49a]::plumbing::QueryCtxt, false>
  66:     0x7f7efd5de151 - rustc_query_impl[e7af9ba2ee20c49a]::query_impl::unsafety_check_result::get_query_non_incr::__rust_end_short_backtrace
  67:     0x7f7efc377d8c - rustc_query_impl[e7af9ba2ee20c49a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7af9ba2ee20c49a]::query_impl::mir_const::dynamic_query::{closure#2}::{closure#0}, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 8usize]>>
  68:     0x7f7efc377cde - <rustc_query_impl[e7af9ba2ee20c49a]::query_impl::mir_const::dynamic_query::{closure#2} as core[63ccc595abf60ca6]::ops::function::FnOnce<(rustc_middle[fbd75b4db2cdb7e6]::ty::context::TyCtxt, rustc_span[ca0c6fb73220b455]::def_id::LocalDefId)>>::call_once
  69:     0x7f7efbd72c1d - rustc_query_system[8b63fd0ca5778b73]::query::plumbing::try_execute_query::<rustc_query_impl[e7af9ba2ee20c49a]::DynamicConfig<rustc_query_system[8b63fd0ca5778b73]::query::caches::VecCache<rustc_span[ca0c6fb73220b455]::def_id::LocalDefId, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e7af9ba2ee20c49a]::plumbing::QueryCtxt, false>
  70:     0x7f7efd5a51d1 - rustc_query_impl[e7af9ba2ee20c49a]::query_impl::mir_const::get_query_non_incr::__rust_end_short_backtrace
  71:     0x7f7efbddf419 - rustc_mir_transform[c8b849373fa8c7e7]::mir_promoted
  72:     0x7f7efbddf271 - rustc_query_impl[e7af9ba2ee20c49a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7af9ba2ee20c49a]::query_impl::mir_promoted::dynamic_query::{closure#2}::{closure#0}, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 16usize]>>
  73:     0x7f7efc1a8df7 - rustc_query_system[8b63fd0ca5778b73]::query::plumbing::try_execute_query::<rustc_query_impl[e7af9ba2ee20c49a]::DynamicConfig<rustc_query_system[8b63fd0ca5778b73]::query::caches::VecCache<rustc_span[ca0c6fb73220b455]::def_id::LocalDefId, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[e7af9ba2ee20c49a]::plumbing::QueryCtxt, false>
  74:     0x7f7efd5d70b7 - rustc_query_impl[e7af9ba2ee20c49a]::query_impl::mir_promoted::get_query_non_incr::__rust_end_short_backtrace
  75:     0x7f7efc9cc2cc - rustc_borrowck[5828231e0ff7c68]::mir_borrowck
  76:     0x7f7efbc7401e - rustc_query_impl[e7af9ba2ee20c49a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7af9ba2ee20c49a]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 8usize]>>
  77:     0x7f7efbc73fee - <rustc_query_impl[e7af9ba2ee20c49a]::query_impl::mir_borrowck::dynamic_query::{closure#2} as core[63ccc595abf60ca6]::ops::function::FnOnce<(rustc_middle[fbd75b4db2cdb7e6]::ty::context::TyCtxt, rustc_span[ca0c6fb73220b455]::def_id::LocalDefId)>>::call_once
  78:     0x7f7efbd72c1d - rustc_query_system[8b63fd0ca5778b73]::query::plumbing::try_execute_query::<rustc_query_impl[e7af9ba2ee20c49a]::DynamicConfig<rustc_query_system[8b63fd0ca5778b73]::query::caches::VecCache<rustc_span[ca0c6fb73220b455]::def_id::LocalDefId, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e7af9ba2ee20c49a]::plumbing::QueryCtxt, false>
  79:     0x7f7efd5de251 - rustc_query_impl[e7af9ba2ee20c49a]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace
  80:     0x7f7efd0293de - rustc_data_structures[bf281432ed14a641]::sync::par_for_each_in::<&[rustc_span[ca0c6fb73220b455]::def_id::LocalDefId], <rustc_middle[fbd75b4db2cdb7e6]::hir::map::Map>::par_body_owners<rustc_interface[9522ab489a5f66e6]::passes::analysis::{closure#1}::{closure#0}>::{closure#0}>
  81:     0x7f7efd0290d6 - <rustc_session[7bc6f0e7ff11a78e]::session::Session>::time::<(), rustc_interface[9522ab489a5f66e6]::passes::analysis::{closure#1}>
  82:     0x7f7efd0287fe - rustc_interface[9522ab489a5f66e6]::passes::analysis
  83:     0x7f7efd08f3ea - rustc_query_impl[e7af9ba2ee20c49a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e7af9ba2ee20c49a]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 1usize]>>
  84:     0x7f7efd08f3d9 - <rustc_query_impl[e7af9ba2ee20c49a]::query_impl::analysis::dynamic_query::{closure#2} as core[63ccc595abf60ca6]::ops::function::FnOnce<(rustc_middle[fbd75b4db2cdb7e6]::ty::context::TyCtxt, ())>>::call_once
  85:     0x7f7efd2ae458 - rustc_query_system[8b63fd0ca5778b73]::query::plumbing::try_execute_query::<rustc_query_impl[e7af9ba2ee20c49a]::DynamicConfig<rustc_query_system[8b63fd0ca5778b73]::query::caches::SingleCache<rustc_middle[fbd75b4db2cdb7e6]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[e7af9ba2ee20c49a]::plumbing::QueryCtxt, false>
  86:     0x7f7efd2ae229 - rustc_query_impl[e7af9ba2ee20c49a]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  87:     0x7f7efd1238e2 - <rustc_interface[9522ab489a5f66e6]::queries::QueryResult<&rustc_middle[fbd75b4db2cdb7e6]::ty::context::GlobalCtxt>>::enter::<core[63ccc595abf60ca6]::result::Result<(), rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>, rustc_driver_impl[e91af841be79713a]::run_compiler::{closure#1}::{closure#2}::{closure#4}>
  88:     0x7f7efd122587 - <rustc_interface[9522ab489a5f66e6]::interface::Compiler>::enter::<rustc_driver_impl[e91af841be79713a]::run_compiler::{closure#1}::{closure#2}, core[63ccc595abf60ca6]::result::Result<core[63ccc595abf60ca6]::option::Option<rustc_interface[9522ab489a5f66e6]::queries::Linker>, rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>>
  89:     0x7f7efd11f7b5 - rustc_span[ca0c6fb73220b455]::set_source_map::<core[63ccc595abf60ca6]::result::Result<(), rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>, rustc_interface[9522ab489a5f66e6]::interface::run_compiler<core[63ccc595abf60ca6]::result::Result<(), rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>, rustc_driver_impl[e91af841be79713a]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  90:     0x7f7efd11f226 - <scoped_tls[35a2f59988e0a19c]::ScopedKey<rustc_span[ca0c6fb73220b455]::SessionGlobals>>::set::<rustc_interface[9522ab489a5f66e6]::interface::run_compiler<core[63ccc595abf60ca6]::result::Result<(), rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>, rustc_driver_impl[e91af841be79713a]::run_compiler::{closure#1}>::{closure#0}, core[63ccc595abf60ca6]::result::Result<(), rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>>
  91:     0x7f7efd11e7ec - std[74d10c9f32099e86]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[9522ab489a5f66e6]::util::run_in_thread_pool_with_globals<rustc_interface[9522ab489a5f66e6]::interface::run_compiler<core[63ccc595abf60ca6]::result::Result<(), rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>, rustc_driver_impl[e91af841be79713a]::run_compiler::{closure#1}>::{closure#0}, core[63ccc595abf60ca6]::result::Result<(), rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[63ccc595abf60ca6]::result::Result<(), rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>>
  92:     0x7f7efd4a53b5 - <<std[74d10c9f32099e86]::thread::Builder>::spawn_unchecked_<rustc_interface[9522ab489a5f66e6]::util::run_in_thread_pool_with_globals<rustc_interface[9522ab489a5f66e6]::interface::run_compiler<core[63ccc595abf60ca6]::result::Result<(), rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>, rustc_driver_impl[e91af841be79713a]::run_compiler::{closure#1}>::{closure#0}, core[63ccc595abf60ca6]::result::Result<(), rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[63ccc595abf60ca6]::result::Result<(), rustc_span[ca0c6fb73220b455]::ErrorGuaranteed>>::{closure#1} as core[63ccc595abf60ca6]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  93:     0x7f7efa970425 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hde6e666388faa495
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/alloc/src/boxed.rs:1993:9
  94:     0x7f7efa970425 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9b6389e489a4842f
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/alloc/src/boxed.rs:1993:9
  95:     0x7f7efa970425 - std::sys::unix::thread::Thread::new::thread_start::hcab660740b858b1f
                               at /rustc/d5c2e9c342b358556da91d61ed4133f6f50fc0c3/library/std/src/sys/unix/thread.rs:108:17
  96:     0x7f7efa68c9eb - <unknown>
  97:     0x7f7efa710dfc - <unknown>
  98:                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 1.72.1 (d5c2e9c34 2023-09-13) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debug-assertions=off -C linker=clang

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [evaluate_obligation] evaluating trait selection obligation `core::result::Result<token::MinusEq, error::Error>: core::marker::Copy`
#1 [is_copy_raw] computing whether `core::result::Result<token::MinusEq, error::Error>` is `Copy`
#2 [needs_drop_raw] computing whether `core::result::Result<token::MinusEq, error::Error>` needs drop
#3 [mir_built] building MIR for `op::parsing::<impl at /home/darth/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-2.0.28/src/op.rs:127:5: 127:25>::parse`
#4 [unsafety_check_result] unsafety-checking `op::parsing::<impl at /home/darth/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-2.0.28/src/op.rs:127:5: 127:25>::parse`
#5 [mir_const] preparing `op::parsing::<impl at /home/darth/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-2.0.28/src/op.rs:127:5: 127:25>::parse` for borrow checking
#6 [mir_promoted] promoting constants in MIR for `op::parsing::<impl at /home/darth/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-2.0.28/src/op.rs:127:5: 127:25>::parse`
#7 [mir_borrowck] borrow-checking `op::parsing::<impl at /home/darth/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-2.0.28/src/op.rs:127:5: 127:25>::parse`
#8 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `syn` (lib)
warning: build failed, waiting for other jobs to finish...

[saethlin]

╭ ➜ ben@archlinux:/tmp/comfy
╰ ➤ git checkout a69821d0683f3698a6550307a028c14f1c5ee9dc
fatal: reference is not a tree: a69821d0683f3698a6550307a028c14f1c5ee9dc

But I can see the commit in the GitHub UI. I'm confused.

[albertlarsan68]

@saethlin You need to git fetch it first, then you can git checkout

[lqd]

Github marks the commit as not belonging to any branch in the repository, so fetching seems unlikely to be enough?

edit: I tried it, and it did not change the reference is not a tree error for me.

[albertlarsan68]

$ git fetch origin a69821d0683f3698a6550307a028c14f1c5ee9dc
$ git checkout a69821d0683f3698a6550307a028c14f1c5ee9dc

This enabled me to checkout the commit, now checking whether the ICE repros or not.

[lqd]

Awesome, thank you!

I wonder if it's related to using mold. Like #101247

[darthdeus]

Awesome, thank you!

I wonder if it's related to using mold. Like #101247

Note sure if it's relevant, but the linked mold issue is MacOS and my crash is on Arch Linux.

[saethlin]

How are you building this project? I'm just running cargo build in the repo and I don't see any crashes.

[darthdeus]

I'm using make which just runs cargo run --example custom_config with some env vars, but ... and dammit it doesn't reproduce for me anymore either, not even on stable 😩 Sorry for the confusion, I ran rustup update earlier today and since then it's been working, but when I reported this yesterday it kept happening even after I cargo clean-ed multiple times hmm.

Is there something I should do the next time it happens?