panic at compiler/rustc_metadata/src/rmeta/def_path_hash_map.rs:18:54

Sorry I can't reproduce the issue and unfortunately the code that triggered it is very complex and private.

Here's the log:

thread 'rustc' (10643760) panicked at compiler/rustc_metadata/src/rmeta/def_path_hash_map.rs:18:54:
called `Option::unwrap()` on a `None` value
stack backtrace:
   0:        0x10ecbbe30 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h616cb314f2809ae5
   1:        0x10c0f391c - core::fmt::write::h18ff235c5756333a
   2:        0x10ec75938 - std::io::Write::write_fmt::h08b80747d0efe8cf
   3:        0x10ec871d4 - std::sys::backtrace::BacktraceLock::print::h96f00828e06745e0
   4:        0x10ec8d7f8 - std::panicking::default_hook::{{closure}}::h662f695cb162c645
   5:        0x10ec8d498 - std::panicking::default_hook::hdc5171bc2654f38e
   6:        0x10cc9490c - std[dcdb8a79b2b43be4]::panicking::update_hook::<alloc[e924fcec0ad23c69]::boxed::Box<rustc_driver_impl[93380e43239406b8]::install_ice_hook::{closure#1}>>::{closure#0}
   7:        0x10ec8dd20 - std::panicking::panic_with_hook::hc216de099a2fe04e
   8:        0x10ec8d9a8 - std::panicking::panic_handler::{{closure}}::hc0a7f90b1247e042
   9:        0x10ec872ec - std::sys::backtrace::__rust_end_short_backtrace::he22d41b92463e575
  10:        0x10ec6ba20 - __rustc[de0091b922c53d7e]::rust_begin_unwind
  11:        0x1119f9dcc - core::panicking::panic_fmt::h9ec18d20141b7425
  12:        0x1119f9dac - core::panicking::panic::h7f4638f81e80c84c
  13:        0x1119f94f4 - core::option::unwrap_failed::h9b6dee36f255b627
  14:        0x10d8939bc - <rustc_metadata[ba7733ec3e7039d1]::rmeta::decoder::cstore_impl::provide_cstore_hooks::{closure#0} as core[137ed0b9e3cbed0c]::ops::function::FnOnce<(rustc_middle[bdd67e833c77e89f]::ty::context::TyCtxt, rustc_span[90b4742fca18941a]::def_id::DefPathHash, rustc_span[90b4742fca18941a]::def_id::StableCrateId)>>::call_once
  15:        0x10d952328 - <rustc_middle[bdd67e833c77e89f]::ty::context::TyCtxt>::def_path_hash_to_def_id
  16:        0x10e157724 - rustc_query_impl[a11e058736f60389]::plumbing::force_from_dep_node::<rustc_query_impl[a11e058736f60389]::DynamicConfig<rustc_query_system[109cd13dd21d7ab8]::query::caches::DefIdCache<rustc_middle[bdd67e833c77e89f]::query::erase::Erased<[u8; 8usize]>>, false, false, false>>
  17:        0x10e407d1c - <rustc_query_impl[a11e058736f60389]::plumbing::query_callback<rustc_query_impl[a11e058736f60389]::query_impl::type_of::QueryType>::{closure#0} as core[137ed0b9e3cbed0c]::ops::function::FnOnce<(rustc_middle[bdd67e833c77e89f]::ty::context::TyCtxt, rustc_query_system[109cd13dd21d7ab8]::dep_graph::dep_node::DepNode, rustc_query_system[109cd13dd21d7ab8]::dep_graph::serialized::SerializedDepNodeIndex)>>::call_once
  18:        0x10e11ecd4 - <rustc_query_system[109cd13dd21d7ab8]::dep_graph::graph::DepGraphData<rustc_middle[bdd67e833c77e89f]::dep_graph::DepsType>>::try_mark_previous_green::<rustc_query_impl[a11e058736f60389]::plumbing::QueryCtxt>
  19:        0x10e11ec80 - <rustc_query_system[109cd13dd21d7ab8]::dep_graph::graph::DepGraphData<rustc_middle[bdd67e833c77e89f]::dep_graph::DepsType>>::try_mark_previous_green::<rustc_query_impl[a11e058736f60389]::plumbing::QueryCtxt>
  20:        0x10e11ec80 - <rustc_query_system[109cd13dd21d7ab8]::dep_graph::graph::DepGraphData<rustc_middle[bdd67e833c77e89f]::dep_graph::DepsType>>::try_mark_previous_green::<rustc_query_impl[a11e058736f60389]::plumbing::QueryCtxt>
  21:        0x10e11eab0 - <rustc_query_system[109cd13dd21d7ab8]::dep_graph::graph::DepGraphData<rustc_middle[bdd67e833c77e89f]::dep_graph::DepsType>>::try_mark_green::<rustc_query_impl[a11e058736f60389]::plumbing::QueryCtxt>
  22:        0x10e1a0218 - rustc_query_system[109cd13dd21d7ab8]::query::plumbing::try_execute_query::<rustc_query_impl[a11e058736f60389]::DynamicConfig<rustc_query_system[109cd13dd21d7ab8]::query::caches::DefaultCache<rustc_type_ir[71611c7a4cb1232f]::canonical::CanonicalQueryInput<rustc_middle[bdd67e833c77e89f]::ty::context::TyCtxt, rustc_middle[bdd67e833c77e89f]::ty::ParamEnvAnd<rustc_middle[bdd67e833c77e89f]::ty::predicate::Predicate>>, rustc_middle[bdd67e833c77e89f]::query::erase::Erased<[u8; 2usize]>>, false, false, false>, rustc_query_impl[a11e058736f60389]::plumbing::QueryCtxt, true>
  23:        0x10e2deeb4 - rustc_query_impl[a11e058736f60389]::query_impl::evaluate_obligation::get_query_incr::__rust_end_short_backtrace
  24:        0x10ea1539c - <rustc_infer[e2bf0338b980650d]::infer::InferCtxt as rustc_trait_selection[373224338dfe82c4]::traits::query::evaluate_obligation::InferCtxtExt>::evaluate_obligation
  25:        0x10ea1574c - <rustc_infer[e2bf0338b980650d]::infer::InferCtxt as rustc_trait_selection[373224338dfe82c4]::traits::query::evaluate_obligation::InferCtxtExt>::evaluate_obligation_no_overflow
  26:        0x10e992cc0 - <rustc_trait_selection[373224338dfe82c4]::traits::fulfill::FulfillProcessor>::process_trait_obligation
  27:        0x10ea55b88 - <rustc_trait_selection[373224338dfe82c4]::traits::fulfill::FulfillProcessor as rustc_data_structures[bcfe4d3f2eb77d37]::obligation_forest::ObligationProcessor>::process_obligation
  28:        0x10e7fda04 - <rustc_data_structures[bcfe4d3f2eb77d37]::obligation_forest::ObligationForest<rustc_trait_selection[373224338dfe82c4]::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection[373224338dfe82c4]::traits::fulfill::FulfillProcessor>
  29:        0x10ea22ad4 - <rustc_trait_selection[373224338dfe82c4]::traits::fulfill::FulfillmentContext<rustc_infer[e2bf0338b980650d]::traits::engine::ScrubbedTraitError> as rustc_infer[e2bf0338b980650d]::traits::engine::TraitEngine<rustc_infer[e2bf0338b980650d]::traits::engine::ScrubbedTraitError>>::select_where_possible
  30:        0x10ea9be10 - <rustc_trait_selection[373224338dfe82c4]::traits::fulfill::FulfillmentContext<rustc_infer[e2bf0338b980650d]::traits::engine::ScrubbedTraitError> as rustc_infer[e2bf0338b980650d]::traits::engine::TraitEngine<rustc_infer[e2bf0338b980650d]::traits::engine::ScrubbedTraitError>>::select_all_or_error
  31:        0x10eab4744 - <rustc_trait_selection[373224338dfe82c4]::traits::engine::ObligationCtxt>::make_canonicalized_query_response::<()>
  32:        0x10eb25440 - rustc_traits[63bb3c1e6d9ac802]::type_op::type_op_prove_predicate
  33:        0x10e167478 - rustc_query_impl[a11e058736f60389]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a11e058736f60389]::query_impl::type_op_prove_predicate::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bdd67e833c77e89f]::query::erase::Erased<[u8; 8usize]>>
  34:        0x10e43bb5c - <rustc_query_impl[a11e058736f60389]::query_impl::type_op_prove_predicate::dynamic_query::{closure#2} as core[137ed0b9e3cbed0c]::ops::function::FnOnce<(rustc_middle[bdd67e833c77e89f]::ty::context::TyCtxt, rustc_type_ir[71611c7a4cb1232f]::canonical::CanonicalQueryInput<rustc_middle[bdd67e833c77e89f]::ty::context::TyCtxt, rustc_middle[bdd67e833c77e89f]::ty::ParamEnvAnd<rustc_middle[bdd67e833c77e89f]::traits::query::type_op::ProvePredicate>>)>>::call_once
  35:        0x10e1a2a70 - rustc_query_system[109cd13dd21d7ab8]::query::plumbing::try_execute_query::<rustc_query_impl[a11e058736f60389]::DynamicConfig<rustc_query_system[109cd13dd21d7ab8]::query::caches::DefaultCache<rustc_type_ir[71611c7a4cb1232f]::canonical::CanonicalQueryInput<rustc_middle[bdd67e833c77e89f]::ty::context::TyCtxt, rustc_middle[bdd67e833c77e89f]::ty::ParamEnvAnd<rustc_middle[bdd67e833c77e89f]::traits::query::type_op::ProvePredicate>>, rustc_middle[bdd67e833c77e89f]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[a11e058736f60389]::plumbing::QueryCtxt, true>
  36:        0x10e2ec020 - rustc_query_impl[a11e058736f60389]::query_impl::type_op_prove_predicate::get_query_incr::__rust_end_short_backtrace
  37:        0x10ea16170 - <rustc_middle[bdd67e833c77e89f]::traits::query::type_op::ProvePredicate as rustc_trait_selection[373224338dfe82c4]::traits::query::type_op::QueryTypeOp>::perform_query
  38:        0x10c54ee78 - <rustc_borrowck[fa28a1bac3fe91dd]::type_check::TypeChecker>::fully_perform_op::<(), rustc_middle[bdd67e833c77e89f]::ty::ParamEnvAnd<rustc_middle[bdd67e833c77e89f]::traits::query::type_op::ProvePredicate>>
  39:        0x10c6ac248 - <rustc_borrowck[fa28a1bac3fe91dd]::type_check::TypeChecker>::normalize_and_prove_instantiated_predicates
  40:        0x10c798cc4 - <rustc_borrowck[fa28a1bac3fe91dd]::type_check::TypeChecker as rustc_middle[bdd67e833c77e89f]::mir::visit::Visitor>::visit_const_operand
  41:        0x10c793a08 - <rustc_borrowck[fa28a1bac3fe91dd]::type_check::TypeChecker as rustc_middle[bdd67e833c77e89f]::mir::visit::Visitor>::visit_operand
  42:        0x10c795678 - <rustc_borrowck[fa28a1bac3fe91dd]::type_check::TypeChecker as rustc_middle[bdd67e833c77e89f]::mir::visit::Visitor>::visit_terminator
  43:        0x10c78ec68 - <rustc_borrowck[fa28a1bac3fe91dd]::type_check::TypeChecker as rustc_middle[bdd67e833c77e89f]::mir::visit::Visitor>::visit_body
  44:        0x10c72c42c - rustc_borrowck[fa28a1bac3fe91dd]::type_check::type_check
  45:        0x10c69dafc - <rustc_borrowck[fa28a1bac3fe91dd]::root_cx::BorrowCheckRootCtxt>::do_mir_borrowck
  46:        0x10c687fb8 - rustc_borrowck[fa28a1bac3fe91dd]::mir_borrowck
  47:        0x10e163014 - rustc_query_impl[a11e058736f60389]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a11e058736f60389]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bdd67e833c77e89f]::query::erase::Erased<[u8; 8usize]>>
  48:        0x10e20667c - rustc_query_system[109cd13dd21d7ab8]::query::plumbing::try_execute_query::<rustc_query_impl[a11e058736f60389]::DynamicConfig<rustc_data_structures[bcfe4d3f2eb77d37]::vec_cache::VecCache<rustc_span[90b4742fca18941a]::def_id::LocalDefId, rustc_middle[bdd67e833c77e89f]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[109cd13dd21d7ab8]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[a11e058736f60389]::plumbing::QueryCtxt, true>
  49:        0x10e2c9eb0 - rustc_query_impl[a11e058736f60389]::query_impl::mir_borrowck::get_query_incr::__rust_end_short_backtrace
  50:        0x10d554468 - <rustc_middle[bdd67e833c77e89f]::ty::context::TyCtxt>::par_hir_body_owners::<rustc_interface[458eaf07f27e250a]::passes::run_required_analyses::{closure#1}::{closure#0}>::{closure#0}
  51:        0x10d597940 - rustc_interface[458eaf07f27e250a]::passes::run_required_analyses
  52:        0x10d59a338 - rustc_interface[458eaf07f27e250a]::passes::analysis
  53:        0x10e168b00 - rustc_query_impl[a11e058736f60389]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a11e058736f60389]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bdd67e833c77e89f]::query::erase::Erased<[u8; 0usize]>>
  54:        0x10e184dac - rustc_query_system[109cd13dd21d7ab8]::query::plumbing::try_execute_query::<rustc_query_impl[a11e058736f60389]::DynamicConfig<rustc_query_system[109cd13dd21d7ab8]::query::caches::SingleCache<rustc_middle[bdd67e833c77e89f]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[a11e058736f60389]::plumbing::QueryCtxt, true>
  55:        0x10e2fafd0 - rustc_query_impl[a11e058736f60389]::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
  56:        0x10cc83cac - rustc_interface[458eaf07f27e250a]::passes::create_and_enter_global_ctxt::<core[137ed0b9e3cbed0c]::option::Option<rustc_interface[458eaf07f27e250a]::queries::Linker>, rustc_driver_impl[93380e43239406b8]::run_compiler::{closure#0}::{closure#2}>
  57:        0x10cc92f14 - rustc_interface[458eaf07f27e250a]::interface::run_compiler::<(), rustc_driver_impl[93380e43239406b8]::run_compiler::{closure#0}>::{closure#1}
  58:        0x10cc874e4 - std[dcdb8a79b2b43be4]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[458eaf07f27e250a]::util::run_in_thread_with_globals<rustc_interface[458eaf07f27e250a]::util::run_in_thread_pool_with_globals<rustc_interface[458eaf07f27e250a]::interface::run_compiler<(), rustc_driver_impl[93380e43239406b8]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  59:        0x10cc99200 - <<std[dcdb8a79b2b43be4]::thread::Builder>::spawn_unchecked_<rustc_interface[458eaf07f27e250a]::util::run_in_thread_with_globals<rustc_interface[458eaf07f27e250a]::util::run_in_thread_pool_with_globals<rustc_interface[458eaf07f27e250a]::interface::run_compiler<(), rustc_driver_impl[93380e43239406b8]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[137ed0b9e3cbed0c]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  60:        0x10ec83cb8 - std::sys::thread::unix::Thread::new::thread_start::h6ddd5a264790bcab
  61:        0x192ee1c08 - __pthread_cond_wait

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 1.91.0 (f8297e351 2025-10-28) running on aarch64-apple-darwin

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked -C incremental=[REDACTED]

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

query stack during panic:
#0 [evaluate_obligation] evaluating trait selection obligation `{coroutine witness@[REDACTED]}: core::marker::Send`
#1 [type_op_prove_predicate] evaluating `type_op_prove_predicate` `ProvePredicate { predicate: Binder { value: TraitPredicate(<{async block@h[REDACTRED]} as core::marker::Send>, polarity:Positive), bound_vars: [] } }`
... and 2 other queries... use `env RUST_BACKTRACE=1` to see the full query stack
there was a panic while trying to force a dep node
try_mark_green dep node stack:
#0 TraitSelect(9f901526fb9013bf-461a829e600423da)
#1 TraitSelect(3286289bb5d1551c-83decdd5e63c3118)
#2 evaluate_obligation(bfe598cc4511f4dd-cb21e456e20d2c82)
end of try_mark_green dep node stack