ICE: index out of bounds in rustc_codegen_ssa

[parasyte]

Code

Minimal repro: https://github.com/parasyte/crashy

Meta

This is the first nightly that the ICE appears in. (Does not appear to affect 2024-05-22 or earlier.)

rustc --version --verbose:

rustc 1.80.0-nightly (867900499 2024-05-23)
binary: rustc
commit-hash: 8679004993f08807289911d9f400f4ac4391d2bc
commit-date: 2024-05-23
host: aarch64-apple-darwin
release: 1.80.0-nightly
LLVM version: 18.1.6

Error output

Backtrace

thread 'rustc' panicked at compiler/rustc_codegen_ssa/src/back/link.rs:2700:27:
index out of bounds: the len is 20 but the index is 20
stack backtrace:
   0:        0x102e97260 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hfa1323da475f800d
   1:        0x102ed9d14 - core::fmt::write::heaa8abb186c3047d
   2:        0x102e8d65c - std::io::Write::write_fmt::h3d08850e35aab4bf
   3:        0x102e970b8 - std::sys_common::backtrace::print::h4df82b4992ac1fc1
   4:        0x102e996c0 - std::panicking::default_hook::{{closure}}::h7ff64b2e0b9b22e2
   5:        0x102e9938c - std::panicking::default_hook::h22468db7cd0b8309
   6:        0x10c779e74 - <alloc[b3d7b17f3254a7e4]::boxed::Box<rustc_driver_impl[d78fc4912d252757]::install_ice_hook::{closure#0}> as core[7a0d7fb87c17620e]::ops::function::Fn<(&dyn for<'a, 'b> core[7a0d7fb87c17620e]::ops::function::Fn<(&'a core[7a0d7fb87c17620e]::panic::panic_info::PanicInfo<'b>,), Output = ()> + core[7a0d7fb87c17620e]::marker::Sync + core[7a0d7fb87c17620e]::marker::Send, &core[7a0d7fb87c17620e]::panic::panic_info::PanicInfo)>>::call
   7:        0x102e9a0ac - std::panicking::rust_panic_with_hook::h7f81e6b48edd822e
   8:        0x102e99ac0 - std::panicking::begin_panic_handler::{{closure}}::h61dc216c734bb31b
   9:        0x102e976e4 - std::sys_common::backtrace::__rust_end_short_backtrace::h14d37ee99da8f514
  10:        0x102e99830 - _rust_begin_unwind
  11:        0x102ef5608 - core::panicking::panic_fmt::h879022f43970f0ca
  12:        0x102ef5768 - core::panicking::panic_bounds_check::habf076b85f30241b
  13:        0x10c4d5efc - rustc_codegen_ssa[6b173b5bf0f2b0be]::back::link::linker_with_args
  14:        0x10c4cccac - rustc_codegen_ssa[6b173b5bf0f2b0be]::back::link::link_natively
  15:        0x10c4c8e70 - rustc_codegen_ssa[6b173b5bf0f2b0be]::back::link::link_binary
  16:        0x10c3da0e0 - <rustc_codegen_llvm[21fd93a69a5e3bd5]::LlvmCodegenBackend as rustc_codegen_ssa[6b173b5bf0f2b0be]::traits::backend::CodegenBackend>::link
  17:        0x10cf170a8 - <rustc_interface[9b74dd81a584a30b]::queries::Linker>::link
  18:        0x10c76cca4 - rustc_span[16eba1eb411798eb]::create_session_globals_then::<core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>, rustc_interface[9b74dd81a584a30b]::util::run_in_thread_with_globals<rustc_interface[9b74dd81a584a30b]::util::run_in_thread_pool_with_globals<rustc_interface[9b74dd81a584a30b]::interface::run_compiler<core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>, rustc_driver_impl[d78fc4912d252757]::run_compiler::{closure#0}>::{closure#1}, core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>>::{closure#0}, core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>>::{closure#0}::{closure#0}::{closure#0}>
  19:        0x10c73a9c8 - std[c992710344e8eb3f]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[9b74dd81a584a30b]::util::run_in_thread_with_globals<rustc_interface[9b74dd81a584a30b]::util::run_in_thread_pool_with_globals<rustc_interface[9b74dd81a584a30b]::interface::run_compiler<core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>, rustc_driver_impl[d78fc4912d252757]::run_compiler::{closure#0}>::{closure#1}, core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>>::{closure#0}, core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>>
  20:        0x10c706024 - <<std[c992710344e8eb3f]::thread::Builder>::spawn_unchecked_<rustc_interface[9b74dd81a584a30b]::util::run_in_thread_with_globals<rustc_interface[9b74dd81a584a30b]::util::run_in_thread_pool_with_globals<rustc_interface[9b74dd81a584a30b]::interface::run_compiler<core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>, rustc_driver_impl[d78fc4912d252757]::run_compiler::{closure#0}>::{closure#1}, core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>>::{closure#0}, core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[7a0d7fb87c17620e]::result::Result<(), rustc_span[16eba1eb411798eb]::ErrorGuaranteed>>::{closure#2} as core[7a0d7fb87c17620e]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  21:        0x102ea2a04 - std::sys::pal::unix::thread::Thread::new::thread_start::h020974cd53976785
  22:        0x195abaf94 - __pthread_joiner_wake

[lqd]

This looks to be from #124976 cc @petrochenkov

[justsmth]

I believe this is the same failure I'm seeing on nightly: https://github.com/aws/aws-lc-rs/actions/runs/9225266351/job/25382407173?pr=410#step:5:127

Details

thread 'rustc' panicked at compiler/rustc_codegen_ssa/src/back/link.rs:2700:27:
index out of bounds: the len is 34 but the index is 34
stack backtrace:
   0: rust_begin_unwind
             at /rustc/8679004993f08807289911d9f400f4ac4391d2bc/library/std/src/panicking.rs:652:5
   1: core::panicking::panic_fmt
             at /rustc/8679004993f08807289911d9f400f4ac4391d2bc/library/core/src/panicking.rs:72:14
   2: core::panicking::panic_bounds_check
             at /rustc/8679004993f08807289911d9f400f4ac4391d2bc/library/core/src/panicking.rs:274:5
   3: rustc_codegen_ssa::back::link::linker_with_args
   4: rustc_codegen_ssa::back::link::link_natively
   5: rustc_codegen_ssa::back::link::link_binary
   6: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::link
   7: <rustc_interface::queries::Linker>::link
   8: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
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 make sure that you have updated to the latest nightly

note: please attach the file at `/home/runner/work/aws-lc-rs/aws-lc-rs/rustc-ice-2024-05-24T14_08_10-3884.txt` to your bug report

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -Z sanitizer=address

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

query stack during panic:
end of query stack
error: could not compile `aws-lc-rs` (lib test)

This occurred in our CI, but I can attempt to reproduce locally to provide more details if needed.

[lqd]

I have a local fix but haven't yet managed to make a unit test out of the repros, making hard to ensure it won't regress.

[PickLL]

I think I'm getting this too, if it's different I can make a new issue

Details

thread 'rustc' panicked at compiler/rustc_codegen_ssa/src/back/link.rs:2700:27:
index out of bounds: the len is 197 but the index is 197
stack backtrace:
   0:     0x729a9f383a15 - std::backtrace_rs::backtrace::libunwind::trace::h9fff41df29930226
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x729a9f383a15 - std::backtrace_rs::backtrace::trace_unsynchronized::hd333ee9fabe37696
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x729a9f383a15 - std::sys_common::backtrace::_print_fmt::ha8cea204a14d4b05
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x729a9f383a15 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h23b6b3b597037ccc
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x729a9f3d2aeb - core::fmt::rt::Argument::fmt::h108a26a03f438748
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/core/src/fmt/rt.rs:165:63
   5:     0x729a9f3d2aeb - core::fmt::write::h04064cb45a345462
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/core/src/fmt/mod.rs:1172:21
   6:     0x729a9f37881f - std::io::Write::write_fmt::h222f9a473033d72e
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/io/mod.rs:1835:15
   7:     0x729a9f3837ee - std::sys_common::backtrace::_print::h0d72338fa5455ac9
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x729a9f3837ee - std::sys_common::backtrace::print::he02582a61c39a81d
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x729a9f386219 - std::panicking::default_hook::{{closure}}::h93f8f6e01b4e4fd9
  10:     0x729a9f385fba - std::panicking::default_hook::hbc1b8395cdf679f0
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/panicking.rs:298:9
  11:     0x729a9bcf6ca0 - std[cc47417a42f879a6]::panicking::update_hook::<alloc[df7394d838fa0811]::boxed::Box<rustc_driver_impl[cc9fecfd491acb62]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x729a9f38694b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h79ea62f4492f4aab
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/alloc/src/boxed.rs:2077:9
  13:     0x729a9f38694b - std::panicking::rust_panic_with_hook::h2d3b3b5d41eafa75
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/panicking.rs:799:13
  14:     0x729a9f3866c4 - std::panicking::begin_panic_handler::{{closure}}::hc78e06bc8800937b
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/panicking.rs:664:13
  15:     0x729a9f383ed9 - std::sys_common::backtrace::__rust_end_short_backtrace::h10081666adae5ac0
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x729a9f3863f7 - rust_begin_unwind
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/panicking.rs:652:5
  17:     0x729a9f3cf0b3 - core::panicking::panic_fmt::he2bec51da94b7c97
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/core/src/panicking.rs:72:14
  18:     0x729a9f3cf2d7 - core::panicking::panic_bounds_check::hb4329ed58f0884b5
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/core/src/panicking.rs:274:5
  19:     0x729a9de26bce - rustc_codegen_ssa[761b6f74a49dce2a]::back::link::linker_with_args
  20:     0x729a9de1b49e - rustc_codegen_ssa[761b6f74a49dce2a]::back::link::link_natively
  21:     0x729a9de3f28f - rustc_codegen_ssa[761b6f74a49dce2a]::back::link::link_binary
  22:     0x729a9de3e7a2 - <rustc_codegen_llvm[7475ce1e9176645d]::LlvmCodegenBackend as rustc_codegen_ssa[761b6f74a49dce2a]::traits::backend::CodegenBackend>::link
  23:     0x729a9de41fe4 - <rustc_interface[5237f8c382850565]::queries::Linker>::link
  24:     0x729a9dbab2a9 - rustc_interface[5237f8c382850565]::interface::run_compiler::<core[f15517118b5ac71d]::result::Result<(), rustc_span[c5bccc19da2c0bb2]::ErrorGuaranteed>, rustc_driver_impl[cc9fecfd491acb62]::run_compiler::{closure#0}>::{closure#1}
  25:     0x729a9db96b27 - std[cc47417a42f879a6]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[5237f8c382850565]::util::run_in_thread_with_globals<rustc_interface[5237f8c382850565]::util::run_in_thread_pool_with_globals<rustc_interface[5237f8c382850565]::interface::run_compiler<core[f15517118b5ac71d]::result::Result<(), rustc_span[c5bccc19da2c0bb2]::ErrorGuaranteed>, rustc_driver_impl[cc9fecfd491acb62]::run_compiler::{closure#0}>::{closure#1}, core[f15517118b5ac71d]::result::Result<(), rustc_span[c5bccc19da2c0bb2]::ErrorGuaranteed>>::{closure#0}, core[f15517118b5ac71d]::result::Result<(), rustc_span[c5bccc19da2c0bb2]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[f15517118b5ac71d]::result::Result<(), rustc_span[c5bccc19da2c0bb2]::ErrorGuaranteed>>
  26:     0x729a9db968ea - <<std[cc47417a42f879a6]::thread::Builder>::spawn_unchecked_<rustc_interface[5237f8c382850565]::util::run_in_thread_with_globals<rustc_interface[5237f8c382850565]::util::run_in_thread_pool_with_globals<rustc_interface[5237f8c382850565]::interface::run_compiler<core[f15517118b5ac71d]::result::Result<(), rustc_span[c5bccc19da2c0bb2]::ErrorGuaranteed>, rustc_driver_impl[cc9fecfd491acb62]::run_compiler::{closure#0}>::{closure#1}, core[f15517118b5ac71d]::result::Result<(), rustc_span[c5bccc19da2c0bb2]::ErrorGuaranteed>>::{closure#0}, core[f15517118b5ac71d]::result::Result<(), rustc_span[c5bccc19da2c0bb2]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[f15517118b5ac71d]::result::Result<(), rustc_span[c5bccc19da2c0bb2]::ErrorGuaranteed>>::{closure#2} as core[f15517118b5ac71d]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  27:     0x729a9f39072b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hde1d5bf43c23e9b6
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/alloc/src/boxed.rs:2063:9
  28:     0x729a9f39072b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd62d46857b01b0f7
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/alloc/src/boxed.rs:2063:9
  29:     0x729a9f39072b - std::sys::pal::unix::thread::Thread::new::thread_start::hffa103f3e3af41f3
                               at /rustc/36153f1a4e3162f0a143c7b3e468ecb3beb0008e/library/std/src/sys/pal/unix/thread.rs:108:17
  30:     0x729a9f12fded - <unknown>
  31:     0x729a9f1b30dc - <unknown>
  32:                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 make sure that you have updated to the latest nightly

note: please attach the file at `/home/pickl/rust/ice/rustc-ice-2024-05-25T20_37_11-175362.txt` to your bug report

note: compiler flags: --crate-type bin -C embed-bitcode=no -C debuginfo=2 -C incremental=[REDACTED] -C target-cpu=native

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

query stack during panic:
end of query stack

rustc --version --verbose:

rustc 1.80.0-nightly (36153f1a4 2024-05-24)
binary: rustc
commit-hash: 36153f1a4e3162f0a143c7b3e468ecb3beb0008e
commit-date: 2024-05-24
host: x86_64-unknown-linux-gnu
release: 1.80.0-nightly
LLVM version: 18.1.6