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rust-1.75.0 fails to compile with ICE on aarch64 and various ppc arches with LTO enabled - error: could not compile memchr #121124

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rust-1.75.0 fails to compile with ICE on aarch64 and various ppc arches with LTO enabled - error: could not compile memchr#121124
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A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.A-LTOArea: Link-time optimization (LTO)C-bugCategory: This is a bug.E-needs-investigationCall for partcipation: This issues needs some investigation to determine current statusE-needs-mcveCall for participation: This issue has a repro, but needs a Minimal Complete and Verifiable ExampleI-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️I-unsoundIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/SoundnessO-AArch64Armv8-A or later processors in AArch64 modeO-PowerPCTarget: PowerPC processorsP-highHigh priorityT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.regression-from-stable-to-stablePerformance or correctness regression from one stable version to another.
@bowlofeggs

Description

@bowlofeggs
bowlofeggs
opened on Feb 15, 2024 · edited by bowlofeggs

Greetings! A Gentoo user reported a build failure with Rust 1.75.0 on aarch64 when building with lto = "fat" in config.toml. Other users have found that LTO also causes build failures on ppc, ppc64, and ppc64le.

Meta

This is Rust 1.75.0, built on the end users' machines.

Error output

Caused by:
  process didn't exit successfully: `CARGO=/var/tmp/notmpfs/portage/dev-lang/rust-1.75.0-r1/work/rust-stage0/bin/cargo CARGO_CRATE_NAME=pkg_config CARGO_MANIFEST_DIR=/var/tmp/notmpfs/portage/dev-lang/rust-1.75.0-r1/work/rustc-1.75.0-src/vendor/pkg-config CARGO_PKG_AUTHORS='Alex Crichton <[alex@alexcrichton.com](mailto:alex@alexcrichton.com)>' CARGO_PKG_DESCRIPTION='A library to run the pkg-config system tool at build time in order to be used in
  Cargo build scripts.
  ' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE='MIT OR Apache-2.0' CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=pkg-config CARGO_PKG_README=README.md CARGO_PKG_REPOSITORY='https://github.com/rust-lang/pkg-config-rs' CARGO_PKG_RUST_VERSION=1.30 CARGO_PKG_VERSION=0.3.27 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=3 CARGO_PKG_VERSION_PATCH=27 CARGO_PKG_VERSION_PRE='' LD_LIBRARY_PATH='/var/tmp/notmpfs/portage/dev-lang/rust-1.75.0-r1/work/rustc-1.75.0-src/build/aarch64-unknown-linux-gnu/stage2-tools/release/deps:/var/tmp/notmpfs/portage/dev-lang/rust-1.75.0-r1/work/rustc-1.75.0-src/build/aarch64-unknown-linux-gnu/stage2/lib' /var/tmp/notmpfs/portage/dev-lang/rust-1.75.0-r1/work/rustc-1.75.0-src/build/bootstrap/debug/rustc --crate-name pkg_config /var/tmp/notmpfs/portage/dev-lang/rust-1.75.0-r1/work/rustc-1.75.0-src/vendor/pkg-config/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debug-assertions=off -Zunstable-options --check-cfg 'values(feature)' --check-cfg 'names()' --check-cfg 'values()' -C metadata=13f5ba3fd8dd7c11 -C extra-filename=-13f5ba3fd8dd7c11 --out-dir /var/tmp/notmpfs/portage/dev-lang/rust-1.75.0-r1/work/rustc-1.75.0-src/build/aarch64-unknown-linux-gnu/stage2-tools/release/deps -C linker=aarch64-unknown-linux-gnu-gcc -L dependency=/var/tmp/notmpfs/portage/dev-lang/rust-1.75.0-r1/work/rustc-1.75.0-src/build/aarch64-unknown-linux-gnu/stage2-tools/release/deps --cap-lints warn -Z binary-dep-depinfo` (exit status: 101)
thread 'rustc' panicked at compiler/rustc_const_eval/src/interpret/place.rs:633:57:
index out of bounds: the len is 1 but the index is 4294967040
stack backtrace:
   0: rust_begin_unwind
   1: core::panicking::panic_fmt
   2: core::panicking::panic_bounds_check
   3: <rustc_const_eval::interpret::eval_context::InterpCx<rustc_const_eval::const_eval::machine::CompileTimeInterpreter>>::write_immediate_no_validate::<rustc_const_eval::interpret::place::PlaceTy>
   4: <rustc_const_eval::interpret::eval_context::InterpCx<rustc_const_eval::const_eval::machine::CompileTimeInterpreter>>::eval_rvalue_into_place
   5: rustc_const_eval::const_eval::eval_queries::eval_in_interpreter
   6: rustc_const_eval::const_eval::eval_queries::eval_to_allocation_raw_provider
      [... omitted 2 frames ...]
   7: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::ParamEnvAnd<rustc_middle::mir::interpret::GlobalId>, rustc_middle::query::erase::Erased<[u8; 24]>>>
   8: rustc_const_eval::const_eval::eval_queries::eval_to_const_value_raw_provider
      [... omitted 2 frames ...]
   9: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::ParamEnvAnd<rustc_middle::mir::interpret::GlobalId>, rustc_middle::query::erase::Erased<[u8; 24]>>>
  10: <rustc_middle::ty::context::TyCtxt>::const_eval_global_id
  11: <rustc_middle::ty::context::TyCtxt>::const_eval_resolve
  12: <rustc_const_eval::interpret::eval_context::InterpCx<rustc_const_eval::const_eval::machine::CompileTimeInterpreter>>::push_stack_frame
  13: rustc_const_eval::const_eval::eval_queries::eval_in_interpreter
  14: rustc_const_eval::const_eval::eval_queries::eval_to_allocation_raw_provider
      [... omitted 2 frames ...]
  15: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::ParamEnvAnd<rustc_middle::mir::interpret::GlobalId>, rustc_middle::query::erase::Erased<[u8; 24]>>>
  16: rustc_const_eval::const_eval::eval_queries::eval_to_const_value_raw_provider
      [... omitted 2 frames ...]
  17: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::ParamEnvAnd<rustc_middle::mir::interpret::GlobalId>, rustc_middle::query::erase::Erased<[u8; 24]>>>
  18: <rustc_middle::ty::context::TyCtxt>::const_eval_global_id
  19: <rustc_middle::ty::context::TyCtxt>::const_eval_resolve
  20: <rustc_const_eval::interpret::eval_context::InterpCx<rustc_const_eval::const_eval::machine::CompileTimeInterpreter>>::push_stack_frame
  21: rustc_const_eval::const_eval::eval_queries::eval_in_interpreter
  22: rustc_const_eval::const_eval::eval_queries::eval_to_allocation_raw_provider
      [... omitted 2 frames ...]
  23: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::ParamEnvAnd<rustc_middle::mir::interpret::GlobalId>, rustc_middle::query::erase::Erased<[u8; 24]>>>
  24: rustc_const_eval::const_eval::eval_queries::eval_to_const_value_raw_provider
      [... omitted 2 frames ...]
  25: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::ParamEnvAnd<rustc_middle::mir::interpret::GlobalId>, rustc_middle::query::erase::Erased<[u8; 24]>>>
  26: <rustc_middle::ty::context::TyCtxt>::const_eval_global_id
  27: <rustc_middle::ty::context::TyCtxt>::const_eval_resolve
  28: <rustc_middle::mir::consts::Const>::try_eval_scalar_int
  29: <rustc_middle::mir::consts::Const>::try_eval_bits
  30: <rustc_const_eval::transform::promote_consts::Validator>::validate_local
  31: <core::iter::adapters::copied::Copied<core::slice::iter::Iter<rustc_const_eval::transform::promote_consts::Candidate>> as core::iter::traits::iterator::Iterator>::try_fold::<(), core::iter::traits::iterator::Iterator::find::check<rustc_const_eval::transform::promote_consts::Candidate, &mut rustc_const_eval::transform::promote_consts::validate_candidates::{closure#0}>::{closure#0}, core::ops::control_flow::ControlFlow<rustc_const_eval::transform::promote_consts::Candidate>>
  32: <alloc::vec::Vec<rustc_const_eval::transform::promote_consts::Candidate> as alloc::vec::spec_from_iter::SpecFromIter<rustc_const_eval::transform::promote_consts::Candidate, core::iter::adapters::filter::Filter<core::iter::adapters::copied::Copied<core::slice::iter::Iter<rustc_const_eval::transform::promote_consts::Candidate>>, rustc_const_eval::transform::promote_consts::validate_candidates::{closure#0}>>>::from_iter
  33: <rustc_const_eval::transform::promote_consts::PromoteTemps as rustc_middle::mir::MirPass>::run_pass
  34: rustc_mir_transform::pass_manager::run_passes_inner
  35: rustc_mir_transform::mir_promoted
      [... omitted 1 frame ...]
  36: rustc_borrowck::mir_borrowck
      [... omitted 1 frame ...]
  37: rustc_interface::passes::analysis
      [... omitted 1 frame ...]
  38: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#6}>
  39: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

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 `/var/tmp/notmpfs/portage/dev-lang/rust-1.75.0-r1/work/rustc-1.75.0-src/vendor/memchr/rustc-ice-2024-02-11T16_22_27-21317.txt` to your bug report

note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -Z unstable-options -C linker=aarch64-unknown-linux-gnu-gcc -C symbol-mangling-version=v0 -Z unstable-options -Z macro-backtrace -C split-debuginfo=off -Z binary-dep-depinfo -Z tls-model=initial-exec

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

query stack during panic:
#0 [eval_to_allocation_raw] const-evaluating + checking `core::num::<impl usize>::MAX`
#1 [eval_to_const_value_raw] simplifying constant for the type system `core::num::<impl usize>::MAX`  |  = note: this failure-note originates in the macro `uint_impl` (in Nightly builds, run with -Z macro-backtrace for more info)

#2 [eval_to_allocation_raw] const-evaluating + checking `core::num::<impl usize>::BITS`
#3 [eval_to_const_value_raw] simplifying constant for the type system `core::num::<impl usize>::BITS`
#4 [eval_to_allocation_raw] const-evaluating + checking `arch::all::memchr::USIZE_BYTES`
#5 [eval_to_const_value_raw] simplifying constant for the type system `arch::all::memchr::USIZE_BYTES`
#6 [mir_promoted] promoting constants in MIR for `arch::all::memchr::<impl at /rust/deps/memchr/src/arch/all/memchr.rs:40:1: 40:9>::find_raw`
#7 [mir_borrowck] borrow-checking `arch::all::memchr::<impl at /rust/deps/memchr/src/arch/all/memchr.rs:40:1: 40:9>::find_raw`
#8 [analysis] running analysis passes on this crate
end of query stack

Did not run successfully: exit status: 101
Backtrace

This is the ice file that the output requested:

thread 'rustc' panicked at compiler/rustc_const_eval/src/interpret/place.rs:633:57:
index out of bounds: the len is 1 but the index is 4294967040
stack backtrace:
   0:     0x400006ff8bc0 - std::backtrace::Backtrace::create::hb2aee29319b06e8e
   1:     0x400001a11a50 - <alloc[90ae2a520ce139ee]::boxed::Box<rustc_driver_impl[c9c7a953b4411394]::install_ice_hook::{closure#0}> as core[5a6fd8bb0fda964d]::ops::function::Fn<(&dyn for<'a, 'b> core[5a6fd8bb0fda964d]::ops::function::Fn<(&'a core[5a6fd8bb0fda964d]::panic::panic_info::PanicInfo<'b>,), Output = ()> + core[5a6fd8bb0fda964d]::marker::Send + core[5a6fd8bb0fda964d]::marker::Sync, &core[5a6fd8bb0fda964d]::panic::panic_info::PanicInfo)>>::call
   2:     0x400007011a54 - std::panicking::rust_panic_with_hook::h9c163f1d9c1cbb36
   3:     0x4000070117cc - std::panicking::begin_panic_handler::{{closure}}::h6b0448d5499b219f
   4:     0x40000700ef80 - std::sys_common::backtrace::__rust_end_short_backtrace::hbd2c6bb647b1e398
   5:     0x400007011558 - rust_begin_unwind
   6:     0x400006fdce38 - core::panicking::panic_fmt::h4078202a72ed11d6
   7:     0x400006fdcfc4 - core::panicking::panic_bounds_check::hbc8259532743cd37
   8:     0x4000018c93fc - <rustc_const_eval[f31644989ab683b2]::interpret::eval_context::InterpCx<rustc_const_eval[f31644989ab683b2]::const_eval::machine::CompileTimeInterpreter>>::write_immediate_no_validate::<rustc_const_eval[f31644989ab683b2]::interpret::place::PlaceTy>
   9:     0x4000018ec07c - <rustc_const_eval[f31644989ab683b2]::interpret::eval_context::InterpCx<rustc_const_eval[f31644989ab683b2]::const_eval::machine::CompileTimeInterpreter>>::eval_rvalue_into_place
  10:     0x400001993bb4 - rustc_const_eval[f31644989ab683b2]::const_eval::eval_queries::eval_in_interpreter
  11:     0x40000199ea44 - rustc_const_eval[f31644989ab683b2]::const_eval::eval_queries::eval_to_allocation_raw_provider
  12:     0x40000293f784 - rustc_query_impl[7d02d90d958f3807]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>
  13:     0x4000029b2ae0 - <rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2} as core[5a6fd8bb0fda964d]::ops::function::FnOnce<(rustc_middle[808545804f58c292]::ty::context::TyCtxt, rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>)>>::call_once
  14:     0x400002911c38 - rustc_query_system[51331249ee775339]::query::plumbing::try_execute_query::<rustc_query_impl[7d02d90d958f3807]::DynamicConfig<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[7d02d90d958f3807]::plumbing::QueryCtxt, false>
  15:     0x4000029b2754 - rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_allocation_raw::get_query_non_incr::__rust_end_short_backtrace
  16:     0x40000199e71c - rustc_middle[808545804f58c292]::query::plumbing::query_get_at::<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>>
  17:     0x40000199d730 - rustc_const_eval[f31644989ab683b2]::const_eval::eval_queries::eval_to_const_value_raw_provider
  18:     0x40000293fca8 - rustc_query_impl[7d02d90d958f3807]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_const_value_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>
  19:     0x4000029b3a8c - <rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_const_value_raw::dynamic_query::{closure#2} as core[5a6fd8bb0fda964d]::ops::function::FnOnce<(rustc_middle[808545804f58c292]::ty::context::TyCtxt, rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>)>>::call_once
  20:     0x400002911c38 - rustc_query_system[51331249ee775339]::query::plumbing::try_execute_query::<rustc_query_impl[7d02d90d958f3807]::DynamicConfig<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[7d02d90d958f3807]::plumbing::QueryCtxt, false>
  21:     0x4000029b383c - rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_const_value_raw::get_query_non_incr::__rust_end_short_backtrace
  22:     0x400002288c70 - rustc_middle[808545804f58c292]::query::plumbing::query_get_at::<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>>
  23:     0x400002288a60 - <rustc_middle[808545804f58c292]::ty::context::TyCtxt>::const_eval_global_id
  24:     0x4000022aab40 - <rustc_middle[808545804f58c292]::ty::context::TyCtxt>::const_eval_resolve
  25:     0x4000018d0cd4 - <rustc_const_eval[f31644989ab683b2]::interpret::eval_context::InterpCx<rustc_const_eval[f31644989ab683b2]::const_eval::machine::CompileTimeInterpreter>>::push_stack_frame
  26:     0x400001993950 - rustc_const_eval[f31644989ab683b2]::const_eval::eval_queries::eval_in_interpreter
  27:     0x40000199ea44 - rustc_const_eval[f31644989ab683b2]::const_eval::eval_queries::eval_to_allocation_raw_provider
  28:     0x40000293f784 - rustc_query_impl[7d02d90d958f3807]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>
  29:     0x4000029b2ae0 - <rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2} as core[5a6fd8bb0fda964d]::ops::function::FnOnce<(rustc_middle[808545804f58c292]::ty::context::TyCtxt, rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>)>>::call_once
  30:     0x400002911c38 - rustc_query_system[51331249ee775339]::query::plumbing::try_execute_query::<rustc_query_impl[7d02d90d958f3807]::DynamicConfig<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[7d02d90d958f3807]::plumbing::QueryCtxt, false>
  31:     0x4000029b2754 - rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_allocation_raw::get_query_non_incr::__rust_end_short_backtrace
  32:     0x40000199e71c - rustc_middle[808545804f58c292]::query::plumbing::query_get_at::<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>>
  33:     0x40000199d730 - rustc_const_eval[f31644989ab683b2]::const_eval::eval_queries::eval_to_const_value_raw_provider
  34:     0x40000293fca8 - rustc_query_impl[7d02d90d958f3807]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_const_value_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>
  35:     0x4000029b3a8c - <rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_const_value_raw::dynamic_query::{closure#2} as core[5a6fd8bb0fda964d]::ops::function::FnOnce<(rustc_middle[808545804f58c292]::ty::context::TyCtxt, rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>)>>::call_once
  36:     0x400002911c38 - rustc_query_system[51331249ee775339]::query::plumbing::try_execute_query::<rustc_query_impl[7d02d90d958f3807]::DynamicConfig<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[7d02d90d958f3807]::plumbing::QueryCtxt, false>
  37:     0x4000029b383c - rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_const_value_raw::get_query_non_incr::__rust_end_short_backtrace
  38:     0x400002288c70 - rustc_middle[808545804f58c292]::query::plumbing::query_get_at::<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>>
  39:     0x400002288a60 - <rustc_middle[808545804f58c292]::ty::context::TyCtxt>::const_eval_global_id
  40:     0x4000022aab40 - <rustc_middle[808545804f58c292]::ty::context::TyCtxt>::const_eval_resolve
  41:     0x4000018d0cd4 - <rustc_const_eval[f31644989ab683b2]::interpret::eval_context::InterpCx<rustc_const_eval[f31644989ab683b2]::const_eval::machine::CompileTimeInterpreter>>::push_stack_frame
  42:     0x400001993950 - rustc_const_eval[f31644989ab683b2]::const_eval::eval_queries::eval_in_interpreter
  43:     0x40000199ea44 - rustc_const_eval[f31644989ab683b2]::const_eval::eval_queries::eval_to_allocation_raw_provider
  44:     0x40000293f784 - rustc_query_impl[7d02d90d958f3807]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>
  45:     0x4000029b2ae0 - <rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2} as core[5a6fd8bb0fda964d]::ops::function::FnOnce<(rustc_middle[808545804f58c292]::ty::context::TyCtxt, rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>)>>::call_once
  46:     0x400002911c38 - rustc_query_system[51331249ee775339]::query::plumbing::try_execute_query::<rustc_query_impl[7d02d90d958f3807]::DynamicConfig<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[7d02d90d958f3807]::plumbing::QueryCtxt, false>
  47:     0x4000029b2754 - rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_allocation_raw::get_query_non_incr::__rust_end_short_backtrace
  48:     0x40000199e71c - rustc_middle[808545804f58c292]::query::plumbing::query_get_at::<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>>
  49:     0x40000199d730 - rustc_const_eval[f31644989ab683b2]::const_eval::eval_queries::eval_to_const_value_raw_provider
  50:     0x40000293fca8 - rustc_query_impl[7d02d90d958f3807]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_const_value_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>
  51:     0x4000029b3a8c - <rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_const_value_raw::dynamic_query::{closure#2} as core[5a6fd8bb0fda964d]::ops::function::FnOnce<(rustc_middle[808545804f58c292]::ty::context::TyCtxt, rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>)>>::call_once
  52:     0x400002911c38 - rustc_query_system[51331249ee775339]::query::plumbing::try_execute_query::<rustc_query_impl[7d02d90d958f3807]::DynamicConfig<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[7d02d90d958f3807]::plumbing::QueryCtxt, false>
  53:     0x4000029b383c - rustc_query_impl[7d02d90d958f3807]::query_impl::eval_to_const_value_raw::get_query_non_incr::__rust_end_short_backtrace
  54:     0x400002288c70 - rustc_middle[808545804f58c292]::query::plumbing::query_get_at::<rustc_query_system[51331249ee775339]::query::caches::DefaultCache<rustc_middle[808545804f58c292]::ty::ParamEnvAnd<rustc_middle[808545804f58c292]::mir::interpret::GlobalId>, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 24usize]>>>
  55:     0x400002288b30 - <rustc_middle[808545804f58c292]::ty::context::TyCtxt>::const_eval_global_id
  56:     0x4000022aab40 - <rustc_middle[808545804f58c292]::ty::context::TyCtxt>::const_eval_resolve
  57:     0x400001986b6c - <rustc_middle[808545804f58c292]::mir::consts::Const>::try_eval_scalar_int
  58:     0x400001986778 - <rustc_middle[808545804f58c292]::mir::consts::Const>::try_eval_bits
  59:     0x400001985780 - <rustc_const_eval[f31644989ab683b2]::transform::promote_consts::Validator>::validate_local
  60:     0x400001908388 - <core[5a6fd8bb0fda964d]::iter::adapters::copied::Copied<core[5a6fd8bb0fda964d]::slice::iter::Iter<rustc_const_eval[f31644989ab683b2]::transform::promote_consts::Candidate>> as core[5a6fd8bb0fda964d]::iter::traits::iterator::Iterator>::try_fold::<(), core[5a6fd8bb0fda964d]::iter::traits::iterator::Iterator::find::check<rustc_const_eval[f31644989ab683b2]::transform::promote_consts::Candidate, &mut rustc_const_eval[f31644989ab683b2]::transform::promote_consts::validate_candidates::{closure#0}>::{closure#0}, core[5a6fd8bb0fda964d]::ops::control_flow::ControlFlow<rustc_const_eval[f31644989ab683b2]::transform::promote_consts::Candidate>>
  61:     0x4000019034ac - <alloc[90ae2a520ce139ee]::vec::Vec<rustc_const_eval[f31644989ab683b2]::transform::promote_consts::Candidate> as alloc[90ae2a520ce139ee]::vec::spec_from_iter::SpecFromIter<rustc_const_eval[f31644989ab683b2]::transform::promote_consts::Candidate, core[5a6fd8bb0fda964d]::iter::adapters::filter::Filter<core[5a6fd8bb0fda964d]::iter::adapters::copied::Copied<core[5a6fd8bb0fda964d]::slice::iter::Iter<rustc_const_eval[f31644989ab683b2]::transform::promote_consts::Candidate>>, rustc_const_eval[f31644989ab683b2]::transform::promote_consts::validate_candidates::{closure#0}>>>::from_iter
  62:     0x40000198b328 - <rustc_const_eval[f31644989ab683b2]::transform::promote_consts::PromoteTemps as rustc_middle[808545804f58c292]::mir::MirPass>::run_pass
  63:     0x400002621438 - rustc_mir_transform[5e8ad041f5dad077]::pass_manager::run_passes_inner
  64:     0x40000262ec74 - rustc_mir_transform[5e8ad041f5dad077]::mir_promoted
  65:     0x40000293d014 - rustc_query_impl[7d02d90d958f3807]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7d02d90d958f3807]::query_impl::mir_promoted::dynamic_query::{closure#2}::{closure#0}, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 16usize]>>
  66:     0x40000291dfd8 - rustc_query_system[51331249ee775339]::query::plumbing::try_execute_query::<rustc_query_impl[7d02d90d958f3807]::DynamicConfig<rustc_query_system[51331249ee775339]::query::caches::VecCache<rustc_span[41bcdfd57efa771a]::def_id::LocalDefId, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[7d02d90d958f3807]::plumbing::QueryCtxt, false>
  67:     0x40000299e398 - rustc_query_impl[7d02d90d958f3807]::query_impl::mir_promoted::get_query_non_incr::__rust_end_short_backtrace
  68:     0x40000149c1c4 - rustc_borrowck[710e2f5ce73b6fd1]::mir_borrowck
  69:     0x40000293cfc4 - rustc_query_impl[7d02d90d958f3807]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7d02d90d958f3807]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 8usize]>>
  70:     0x40000291f578 - rustc_query_system[51331249ee775339]::query::plumbing::try_execute_query::<rustc_query_impl[7d02d90d958f3807]::DynamicConfig<rustc_query_system[51331249ee775339]::query::caches::VecCache<rustc_span[41bcdfd57efa771a]::def_id::LocalDefId, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[7d02d90d958f3807]::plumbing::QueryCtxt, false>
  71:     0x4000029af354 - rustc_query_impl[7d02d90d958f3807]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace
  72:     0x400002005cdc - rustc_interface[db4590941cd866b]::passes::analysis
  73:     0x400002940df8 - rustc_query_impl[7d02d90d958f3807]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7d02d90d958f3807]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 1usize]>>
  74:     0x40000290d120 - rustc_query_system[51331249ee775339]::query::plumbing::try_execute_query::<rustc_query_impl[7d02d90d958f3807]::DynamicConfig<rustc_query_system[51331249ee775339]::query::caches::SingleCache<rustc_middle[808545804f58c292]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[7d02d90d958f3807]::plumbing::QueryCtxt, false>
  75:     0x400002997c94 - rustc_query_impl[7d02d90d958f3807]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  76:     0x4000019e6bd4 - <rustc_interface[db4590941cd866b]::queries::QueryResult<&rustc_middle[808545804f58c292]::ty::context::GlobalCtxt>>::enter::<core[5a6fd8bb0fda964d]::result::Result<(), rustc_span[41bcdfd57efa771a]::ErrorGuaranteed>, rustc_driver_impl[c9c7a953b4411394]::run_compiler::{closure#1}::{closure#2}::{closure#6}>
  77:     0x400001a055ec - <scoped_tls[bc883fe07799d80a]::ScopedKey<rustc_span[41bcdfd57efa771a]::SessionGlobals>>::set::<rustc_interface[db4590941cd866b]::interface::run_compiler<core[5a6fd8bb0fda964d]::result::Result<(), rustc_span[41bcdfd57efa771a]::ErrorGuaranteed>, rustc_driver_impl[c9c7a953b4411394]::run_compiler::{closure#1}>::{closure#0}, core[5a6fd8bb0fda964d]::result::Result<(), rustc_span[41bcdfd57efa771a]::ErrorGuaranteed>>
  78:     0x400001a09058 - std[bf926301822f3e32]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[db4590941cd866b]::util::run_in_thread_with_globals<rustc_interface[db4590941cd866b]::interface::run_compiler<core[5a6fd8bb0fda964d]::result::Result<(), rustc_span[41bcdfd57efa771a]::ErrorGuaranteed>, rustc_driver_impl[c9c7a953b4411394]::run_compiler::{closure#1}>::{closure#0}, core[5a6fd8bb0fda964d]::result::Result<(), rustc_span[41bcdfd57efa771a]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[5a6fd8bb0fda964d]::result::Result<(), rustc_span[41bcdfd57efa771a]::ErrorGuaranteed>>
  79:     0x400001a02f70 - <<std[bf926301822f3e32]::thread::Builder>::spawn_unchecked_<rustc_interface[db4590941cd866b]::util::run_in_thread_with_globals<rustc_interface[db4590941cd866b]::interface::run_compiler<core[5a6fd8bb0fda964d]::result::Result<(), rustc_span[41bcdfd57efa771a]::ErrorGuaranteed>, rustc_driver_impl[c9c7a953b4411394]::run_compiler::{closure#1}>::{closure#0}, core[5a6fd8bb0fda964d]::result::Result<(), rustc_span[41bcdfd57efa771a]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[5a6fd8bb0fda964d]::result::Result<(), rustc_span[41bcdfd57efa771a]::ErrorGuaranteed>>::{closure#1} as core[5a6fd8bb0fda964d]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  80:     0x40000701acd0 - std::sys::unix::thread::Thread::new::thread_start::h13adca5242298a37
  81:     0x400007152cbc - <unknown>
  82:     0x4000071bb2dc - <unknown>
  83:                0x0 - <unknown>


rustc version: 1.75.0 (82e1608df 2023-12-21) (gentoo)
platform: aarch64-unknown-linux-gnu

query stack during panic:
#0 [eval_to_allocation_raw] const-evaluating + checking `core::num::<impl usize>::MAX`
#1 [eval_to_const_value_raw] simplifying constant for the type system `core::num::<impl usize>::MAX`
#2 [eval_to_allocation_raw] const-evaluating + checking `core::num::<impl usize>::BITS`
#3 [eval_to_const_value_raw] simplifying constant for the type system `core::num::<impl usize>::BITS`
#4 [eval_to_allocation_raw] const-evaluating + checking `arch::all::memchr::USIZE_BYTES`
#5 [eval_to_const_value_raw] simplifying constant for the type system `arch::all::memchr::USIZE_BYTES`
#6 [mir_promoted] promoting constants in MIR for `arch::all::memchr::<impl at /rust/deps/memchr/src/arch/all/memchr.rs:40:1: 40:9>::find_raw`
#7 [mir_borrowck] borrow-checking `arch::all::memchr::<impl at /rust/deps/memchr/src/arch/all/memchr.rs:40:1: 40:9>::find_raw`
#8 [analysis] running analysis passes on this crate
end of query stack

Users have found disabling lto in the build config.toml allows them to build Rust successfully

Activity

bowlofeggs
added
C-bugCategory: This is a bug.
I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️
T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
on Feb 15, 2024
rustbot
added
needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.
on Feb 15, 2024
saethlin
added
A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)
and removed
A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)
on Feb 15, 2024
saethlin

saethlin commented on Feb 15, 2024

@saethlin
saethlin
on Feb 15, 2024 · edited by saethlin
Member

Honestly this looks like the const-eval interpreter has been miscompiled. That index is 0x00ffffff00000000 which is a suspicious bit pattern. And if that index were valid, it would be the number of locals or frames in the interpter, either is extremely unlikely to have actually happened.

The other user is reporting a smattering of errors, but like the above ICE, they're all from a misbehaving const eval interpreter.

oli-obk
mentioned this on Feb 15, 2024
Noratrieb

Noratrieb commented on Feb 15, 2024

@Noratrieb
Noratrieb
on Feb 15, 2024 · edited by Noratrieb
Member

By the way, rustc is not faster when compiled with fat LTO than with thin LTO (which, unlike the fat LTO config, is well tested, as we distribute our release artifacts with that). #103453

Noratrieb

Noratrieb commented on Feb 15, 2024

@Noratrieb
Noratrieb
on Feb 15, 2024 · edited by Noratrieb
Member

Other people have hit miscompilations in the past too with fat LTO compiling rustc (#110564
). Given that it's not faster and less correct, we should probably remove fat LTO entirely, or at least require the user to pass some sort of "i know what I'm doing" flag.
Where knowing what someone is doing could mean debugging those miscompilations because I definitely don't want to imply that those aren't bad bugs!

jieyouxu
added
O-PowerPCTarget: PowerPC processors
A-LTOArea: Link-time optimization (LTO)
O-AArch64Armv8-A or later processors in AArch64 mode
on Feb 15, 2024
saethlin
added
I-unsoundIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness
regression-from-stable-to-stablePerformance or correctness regression from one stable version to another.
on Feb 15, 2024

12 remaining items

apiraino

apiraino commented on Feb 29, 2024

@apiraino
apiraino
on Feb 29, 2024
Contributor

downgrading to P-high as per T-compiler triage meeting (on Zulip).

@rustbot label -P-critical +P-high

rustbot
added
P-highHigh priority
and removed
P-criticalCritical priority
on Feb 29, 2024
Mark-Simulacrum
added
regression-from-stable-to-stablePerformance or correctness regression from one stable version to another.
and removed
regression-from-stable-to-betaPerformance or correctness regression from stable to beta.
on Mar 15, 2024
bowlofeggs
mentioned this on Mar 17, 2024
bowlofeggs
added a commit that references this issue on Mar 17, 2024

dev-lang/rust: Disable LTO by default and use thin

7346605
gentoo-bot
added a commit that references this issue on Mar 21, 2024

dev-lang/rust: Disable LTO by default and use thin

d7f3dfe
bowlofeggs

bowlofeggs commented on Mar 22, 2024

@bowlofeggs
bowlofeggs
on Mar 22, 2024
Author

thin

We switched to using thin LTO in some testing builds recently, and a user reported to me that thin LTO fails on RISC-V, where fat LTO succeeds.

saethlin

saethlin commented on Mar 22, 2024

@saethlin
saethlin
on Mar 22, 2024
Member

Can you link to an issue report? Or provide any details? Or a reproducer of the problem?

bowlofeggs

bowlofeggs commented on Mar 22, 2024

@bowlofeggs
bowlofeggs
on Mar 22, 2024 · edited by bowlofeggs
Author

Can you link to an issue report? Or provide any details? Or a reproducer of the problem?

This is from the user reporting issues with thin LTO on RISC-V:

error: rustc interrupted by SIGSEGV, printing backtrace
 
/var/tmp/portage/dev-lang/rust-1.76.0-r1/work/rustc-1.76.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib/librustc_driver-6033eea214516925.so(+0x82c3d0)[0x3fbb02c3d0]
linux-vdso.so.1(__vdso_rt_sigreturn+0x0)[0x3fbe5015b0]
/lib64/libc.so.6(__libc_free+0x8)[0x3fba61df8a]
/usr/lib/llvm/17/lib64/libLLVM-17.so(_ZN4llvm15ScalarEvolutionD1Ev+0x420)[0x3fb4d118b0]
/usr/lib/llvm/17/lib64/libLLVM-17.so(+0x15f170c)[0x3fb41f170c]
/usr/lib/llvm/17/lib64/libLLVM-17.so(_ZN4llvm15AnalysisManagerINS_8FunctionEJEE10invalidateERS1_RKNS_17PreservedAnalysesE+0x476)[0x3fb37c8506]
/usr/lib/llvm/17/lib64/libLLVM-17.so(+0x2d5799e)[0x3fb595799e]
/usr/lib/llvm/17/lib64/libLLVM-17.so(_ZN4llvm26CGSCCToFunctionPassAdaptor3runERNS_13LazyCallGraph3SCCERNS_15AnalysisManagerIS2_JRS1_EEES5_RNS_17CGSCCUpdateResultE+0x2f4)[0x3fb4b56a86]
/usr/lib/llvm/17/lib64/libLLVM-17.so(+0x2d4224c)[0x3fb594224c]
/usr/lib/llvm/17/lib64/libLLVM-17.so(_ZN4llvm11PassManagerINS_13LazyCallGraph3SCCENS_15AnalysisManagerIS2_JRS1_EEEJS4_RNS_17CGSCCUpdateResultEEE3runERS2_RS5_S4_S7_+0x122)[0x3fb4b539cc]
/usr/lib/llvm/17/lib64/libLLVM-17.so(+0x1cca23c)[0x3fb48ca23c]
/usr/lib/llvm/17/lib64/libLLVM-17.so(_ZN4llvm21DevirtSCCRepeatedPass3runERNS_13LazyCallGraph3SCCERNS_15AnalysisManagerIS2_JRS1_EEES5_RNS_17CGSCCUpdateResultE+0x160)[0x3fb4b5758e]
/usr/lib/llvm/17/lib64/libLLVM-17.so(+0x1cca1fa)[0x3fb48ca1fa]
/usr/lib/llvm/17/lib64/libLLVM-17.so(_ZN4llvm33ModuleToPostOrderCGSCCPassAdaptor3runERNS_6ModuleERNS_15AnalysisManagerIS1_JEEE+0xa24)[0x3fb4b54528]
/usr/lib/llvm/17/lib64/libLLVM-17.so(_ZN4llvm24ModuleInlinerWrapperPass3runERNS_6ModuleERNS_15AnalysisManagerIS1_JEEE+0x254)[0x3fb48cce9e]
/usr/lib/llvm/17/lib64/libLLVM-17.so(+0x401a806)[0x3fb6c1a806]
/usr/lib/llvm/17/lib64/libLLVM-17.so(_ZN4llvm11PassManagerINS_6ModuleENS_15AnalysisManagerIS1_JEEEJEE3runERS1_RS3_+0x37c)[0x3fb37c55c2]
/var/tmp/portage/dev-lang/rust-1.76.0-r1/work/rustc-1.76.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib/librustc_driver-6033eea214516925.so(LLVMRustOptimize+0xd02)[0x3fbb329df4]
/var/tmp/portage/dev-lang/rust-1.76.0-r1/work/rustc-1.76.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib/librustc_driver-6033eea214516925.so(+0xb11ba2)[0x3fbb311ba2]
/var/tmp/portage/dev-lang/rust-1.76.0-r1/work/rustc-1.76.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib/librustc_driver-6033eea214516925.so(+0xb12174)[0x3fbb312174]
/var/tmp/portage/dev-lang/rust-1.76.0-r1/work/rustc-1.76.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib/librustc_driver-6033eea214516925.so(+0xa44af4)[0x3fbb244af4]
/var/tmp/portage/dev-lang/rust-1.76.0-r1/work/rustc-1.76.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib/librustc_driver-6033eea214516925.so(+0xac488e)[0x3fbb2c488e]
/var/tmp/portage/dev-lang/rust-1.76.0-r1/work/rustc-1.76.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib/librustc_driver-6033eea214516925.so(+0xb0899a)[0x3fbb30899a]
/var/tmp/portage/dev-lang/rust-1.76.0-r1/work/rustc-1.76.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib/librustc_driver-6033eea214516925.so(+0xb1a312)[0x3fbb31a312]
/var/tmp/portage/dev-lang/rust-1.76.0-r1/work/rustc-1.76.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib/librustc_driver-6033eea214516925.so(+0xa461f8)[0x3fbb2461f8]
/var/tmp/portage/dev-lang/rust-1.76.0-r1/work/rustc-1.76.0-src/build/riscv64gc-unknown-linux-gnu/stage1/lib/libstd-119f0871fd3a88fa.so(rust_metadata_std_13990566ce80a7ec+0x771d0)[0x3fba7771d0]
/lib64/libc.so.6(+0x6b0b0)[0x3fba6110b0]
/lib64/libc.so.6(+0xb6dfc)[0x3fba65cdfc]
 
note: we would appreciate a report at https://github.com/rust-lang/rust
note: backtrace dumped due to SIGSEGV! resuming signal
rustc exited with signal: 11 (SIGSEGV)
error: could not compile `rustc_middle` (lib)

They also mentioned that they are using the system-provided LLVM rather than the rust provided one, and they indicated that they think that might be related.

pnkfelix

pnkfelix commented on Mar 22, 2024

@pnkfelix
pnkfelix
on Mar 22, 2024 · edited by pnkfelix
Contributor

I think I might be able to reproduce some related problems here on my Mac M1 (now that I have compiled the compiler with LTO=fat turned on).

In particular: I have not seen the bootstrap itself fail (at least not when doing x.py build --stage 2), but a huge number of UI tests (4,925 tests out of 16,107) fail on a rustc built with LTO=fat, and a quick skim indicates their stacktraces all point to a similar spot in the const-eval system.

I have to go AFK for a bit but I'll poke at this more later.

jieyouxu
added
E-needs-mcveCall for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example
E-needs-investigationCall for partcipation: This issues needs some investigation to determine current status
on Nov 13, 2024
Jamesbarford

Jamesbarford commented on Oct 28, 2025

@Jamesbarford
Jamesbarford
on Oct 28, 2025 · edited by Jamesbarford
Contributor

With the following config.toml, running ./x test with a stage1 compiler (tested on both a Mac Mini M1 and an aarch64-linux machine), I'm not seeing any UI test failures.

Is there something else I should be adding or adjusting to reproduce the issue?

profile = "compiler"

[llvm]
download-ci-llvm = true
ninja = true

[build]
target = [
    "aarch64-unknown-linux-gnu", # aarch64-apple-darwin
]
docs = false
extended = false
tools = ["cargo", "rustdoc"]
configure-args = []

[install]
prefix = "/usr/local"

[rust]
incremental = true
new-symbol-mangling = false
lto = "fat"

[dist]
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    A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.A-LTOArea: Link-time optimization (LTO)C-bugCategory: This is a bug.E-needs-investigationCall for partcipation: This issues needs some investigation to determine current statusE-needs-mcveCall for participation: This issue has a repro, but needs a Minimal Complete and Verifiable ExampleI-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️I-unsoundIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/SoundnessO-AArch64Armv8-A or later processors in AArch64 modeO-PowerPCTarget: PowerPC processorsP-highHigh priorityT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.regression-from-stable-to-stablePerformance or correctness regression from one stable version to another.

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          rust-1.75.0 fails to compile with ICE on aarch64 and various ppc arches with LTO enabled - error: could not compile memchr · Issue #121124 · rust-lang/rust