rust-lang / rust-lang/rust

ICE: transient panic in cstore_impl.rs

Open
#150,038 1 comment 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

C-bug I-ICE S-needs-repro T-compiler
Dominant language
Rust
Stars
119k
Forks
16.1k
PR metrics pending

Description

Code

May be related to: https://github.com/rust-lang/rust/issues/148576, https://github.com/rust-lang/rust/issues/149697.

While working on a project, I noticed the following file had appeared in the project root:

rustc-ice-2025-12-15T22_46_57-51355.txt

I'm not sure what caused it, but I figured I'd provide its contents here in case someone encounters a similar issue.

Before then I noticed I was having some issues getting rust-analyzer to recognize a module as a part of the file tree after I issued an LSP command (via Zed) to rename a folder containing a mod.rs. This may be completely unrelated, however.

Meta

rustc --version --verbose:

rustc 1.91.0-nightly (6ba0ce409 2025-08-21)
binary: rustc
commit-hash: 6ba0ce40941eee1ca02e9ba49c791ada5158747a
commit-date: 2025-08-21
host: aarch64-apple-darwin
release: 1.91.0-nightly
LLVM version: 21.1.0
Error output

See details for full backtrace:

Backtrace 

thread 'rustc' panicked at compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs:692:32:
Box<dyn Any>
stack backtrace:
   0:        0x110593668 - std::backtrace::Backtrace::create::h5663981ce73a174f
   1:        0x10e5fb1ac - rustc_driver_impl[630d3111ef02b9d8]::install_ice_hook::{closure#1}
   2:        0x11058ab48 - std::panicking::panic_with_hook::hffdc458c545a548b
   3:        0x10e6d4e8c - std[299b698f6100d167]::panicking::begin_panic::<rustc_errors[60a837efbe2b5142]::ExplicitBug>::{closure#0}
   4:        0x10e6d4e5c - std[299b698f6100d167]::sys::backtrace::__rust_end_short_backtrace::<std[299b698f6100d167]::panicking::begin_panic<rustc_errors[60a837efbe2b5142]::ExplicitBug>::{closure#0}, !>
   5:        0x11335ad04 - std[299b698f6100d167]::panicking::begin_panic::<rustc_errors[60a837efbe2b5142]::ExplicitBug>
   6:        0x11335746c - <rustc_errors[60a837efbe2b5142]::diagnostic::BugAbort as rustc_errors[60a837efbe2b5142]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
   7:        0x1133b0e50 - rustc_middle[f163148c521ccef4]::util::bug::opt_span_bug_fmt::<rustc_span[b89bf32fa74290af]::span_encoding::Span>::{closure#0}
   8:        0x10f364d64 - rustc_middle[f163148c521ccef4]::ty::context::tls::with_opt::<rustc_middle[f163148c521ccef4]::util::bug::opt_span_bug_fmt<rustc_span[b89bf32fa74290af]::span_encoding::Span>::{closure#0}, !>::{closure#0}
   9:        0x10f364d30 - rustc_middle[f163148c521ccef4]::ty::context::tls::with_context_opt::<rustc_middle[f163148c521ccef4]::ty::context::tls::with_opt<rustc_middle[f163148c521ccef4]::util::bug::opt_span_bug_fmt<rustc_span[b89bf32fa74290af]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  10:        0x1133b0e88 - rustc_middle[f163148c521ccef4]::util::bug::bug_fmt
  11:        0x10f18ce34 - <rustc_metadata[1114383d1d0a92df]::rmeta::decoder::cstore_impl::provide_cstore_hooks::{closure#0} as core[ffba9b917033cfae]::ops::function::FnOnce<(rustc_middle[f163148c521ccef4]::ty::context::TyCtxt, rustc_span[b89bf32fa74290af]::def_id::DefPathHash, rustc_span[b89bf32fa74290af]::def_id::StableCrateId)>>::call_once
  12:        0x10f23e8bc - <rustc_middle[f163148c521ccef4]::ty::context::TyCtxt>::def_path_hash_to_def_id
  13:        0x10fbfebbc - rustc_query_impl[20f71b674d03b0f7]::plumbing::force_from_dep_node::<rustc_query_impl[20f71b674d03b0f7]::DynamicConfig<rustc_data_structures[6bd2b9243466d873]::vec_cache::VecCache<rustc_span[b89bf32fa74290af]::def_id::LocalDefId, rustc_middle[f163148c521ccef4]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[d0c8b3c65c3b9d8a]::dep_graph::graph::DepNodeIndex>, false, false, false>>
  14:        0x10fbf7c80 - <rustc_query_impl[20f71b674d03b0f7]::plumbing::query_callback<rustc_query_impl[20f71b674d03b0f7]::query_impl::local_def_id_to_hir_id::QueryType>::{closure#0} as core[ffba9b917033cfae]::ops::function::FnOnce<(rustc_middle[f163148c521ccef4]::ty::context::TyCtxt, rustc_query_system[d0c8b3c65c3b9d8a]::dep_graph::dep_node::DepNode, rustc_query_system[d0c8b3c65c3b9d8a]::dep_graph::serialized::SerializedDepNodeIndex)>>::call_once
  15:        0x10fc2a758 - <rustc_query_system[d0c8b3c65c3b9d8a]::dep_graph::graph::DepGraphData<rustc_middle[f163148c521ccef4]::dep_graph::DepsType>>::try_mark_previous_green::<rustc_query_impl[20f71b674d03b0f7]::plumbing::QueryCtxt>
  16:        0x10fc285f0 - <rustc_query_system[d0c8b3c65c3b9d8a]::dep_graph::graph::DepGraphData<rustc_middle[f163148c521ccef4]::dep_graph::DepsType>>::try_mark_green::<rustc_query_impl[20f71b674d03b0f7]::plumbing::QueryCtxt>
  17:        0x10fa7f14c - rustc_query_system[d0c8b3c65c3b9d8a]::query::plumbing::try_execute_query::<rustc_query_impl[20f71b674d03b0f7]::DynamicConfig<rustc_query_system[d0c8b3c65c3b9d8a]::query::caches::DefIdCache<rustc_middle[f163148c521ccef4]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[20f71b674d03b0f7]::plumbing::QueryCtxt, true>
  18:        0x10fd8bbdc - rustc_query_impl[20f71b674d03b0f7]::query_impl::def_span::get_query_incr::__rust_end_short_backtrace
  19:        0x10f8e7f08 - rustc_passes[53e878855b1e198a]::entry::entry_fn
  20:        0x10fc033d8 - rustc_query_impl[20f71b674d03b0f7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[20f71b674d03b0f7]::query_impl::entry_fn::dynamic_query::{closure#2}::{closure#0}, rustc_middle[f163148c521ccef4]::query::erase::Erased<[u8; 12usize]>>
  21:        0x10fae5950 - rustc_query_system[d0c8b3c65c3b9d8a]::query::plumbing::try_execute_query::<rustc_query_impl[20f71b674d03b0f7]::DynamicConfig<rustc_query_system[d0c8b3c65c3b9d8a]::query::caches::SingleCache<rustc_middle[f163148c521ccef4]::query::erase::Erased<[u8; 12usize]>>, false, false, false>, rustc_query_impl[20f71b674d03b0f7]::plumbing::QueryCtxt, true>
  22:        0x10fda2858 - rustc_query_impl[20f71b674d03b0f7]::query_impl::entry_fn::get_query_incr::__rust_end_short_backtrace
  23:        0x10ee7115c - rustc_interface[12a2d3700f2b4c86]::passes::run_required_analyses
  24:        0x10ee8660c - rustc_interface[12a2d3700f2b4c86]::passes::analysis
  25:        0x10fbfc8d4 - rustc_query_impl[20f71b674d03b0f7]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[20f71b674d03b0f7]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[f163148c521ccef4]::query::erase::Erased<[u8; 0usize]>>
  26:        0x10faa94c8 - rustc_query_system[d0c8b3c65c3b9d8a]::query::plumbing::try_execute_query::<rustc_query_impl[20f71b674d03b0f7]::DynamicConfig<rustc_query_system[d0c8b3c65c3b9d8a]::query::caches::SingleCache<rustc_middle[f163148c521ccef4]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[20f71b674d03b0f7]::plumbing::QueryCtxt, true>
  27:        0x10fd9f8ec - rustc_query_impl[20f71b674d03b0f7]::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
  28:        0x10e62ab74 - rustc_interface[12a2d3700f2b4c86]::passes::create_and_enter_global_ctxt::<core[ffba9b917033cfae]::option::Option<rustc_interface[12a2d3700f2b4c86]::queries::Linker>, rustc_driver_impl[630d3111ef02b9d8]::run_compiler::{closure#0}::{closure#2}>
  29:        0x10e606bbc - rustc_interface[12a2d3700f2b4c86]::interface::run_compiler::<(), rustc_driver_impl[630d3111ef02b9d8]::run_compiler::{closure#0}>::{closure#1}
  30:        0x10e63e714 - std[299b698f6100d167]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[12a2d3700f2b4c86]::util::run_in_thread_with_globals<rustc_interface[12a2d3700f2b4c86]::util::run_in_thread_pool_with_globals<rustc_interface[12a2d3700f2b4c86]::interface::run_compiler<(), rustc_driver_impl[630d3111ef02b9d8]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  31:        0x10e62df44 - <<std[299b698f6100d167]::thread::Builder>::spawn_unchecked_<rustc_interface[12a2d3700f2b4c86]::util::run_in_thread_with_globals<rustc_interface[12a2d3700f2b4c86]::util::run_in_thread_pool_with_globals<rustc_interface[12a2d3700f2b4c86]::interface::run_compiler<(), rustc_driver_impl[630d3111ef02b9d8]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[ffba9b917033cfae]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  32:        0x110587180 - std::sys::pal::unix::thread::Thread::new::thread_start::hb7546f7c05dbb7eb
  33:        0x190f31c08 - __pthread_cond_wait


rustc version: 1.91.0-nightly (6ba0ce409 2025-08-21)
platform: aarch64-apple-darwin

query stack during panic:
#0 [def_span] looking up span for `main`
#1 [entry_fn] looking up the entry function of a crate
#2 [analysis] running analysis passes on this crate
end of query stack

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs:692 and compare the behavior with related issues #148576 and #149697. Try to reduce the reported nightly ICE to a minimal reproducible example, checking whether the preceding rust-analyzer/Zed module rename is relevant. Done means identifying a reproducible trigger and validating a compiler fix or regression test.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
compilers
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.