`DepNodeIndex` assertion failed while compiling rustc_metadata

[zetanumbers]

Probably just another weird incremental+multithreaded bug. Or git somehow messed up the incremental compilation 🤷🏼.

Code

Commit 72fe2ff after git stash on very small code changes in compiler/rustc_hir/src/definitions.rs with RUSTFLAGS_BOOTSTRAP=-Zthreads24 set.

Meta

build/x86_64-unknown-linux-gnu/stage0/bin/rustc --version --verbose:

rustc 1.92.0-beta.1 (3b4dd9bf1 2025-10-28)
binary: rustc
commit-hash: 3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f
commit-date: 2025-10-28
host: x86_64-unknown-linux-gnu
release: 1.92.0-beta.1
LLVM version: 21.1.3

Error output

thread 'rustc' (247265) panicked at /rustc-dev/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/compiler/rustc_query_system/src/dep_graph/graph.rs:43:1:
assertion failed: value <= 0xFFFF_FF00

Backtrace

  0: __rustc::rust_begin_unwind
   1: core::panicking::panic_fmt
   2: core::panicking::panic
   3: <rustc_query_system::dep_graph::graph::DepGraphData<rustc_middle::dep_graph::DepsType>>::try_mark_previous_green::<rustc_query_impl::plumbing::QueryCtxt>
   4: <rustc_query_system::dep_graph::graph::DepGraphData<rustc_middle::dep_graph::DepsType>>::try_mark_previous_green::<rustc_query_impl::plumbing::QueryCtxt>
   5: <rustc_query_system::dep_graph::graph::DepGraphData<rustc_middle::dep_graph::DepsType>>::try_mark_previous_green::<rustc_query_impl::plumbing::QueryCtxt>
   6: rustc_query_system::query::plumbing::ensure_must_run::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
   7: <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners::<rustc_interface::passes::run_required_analyses::{closure#1}::{closure#0}>::{closure#0}
   8: rustc_data_structures::sync::parallel::par_slice::par_rec::<&rustc_span::def_id::LocalDefId, rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#1}::{closure#0}>::{closure#0}>::{closure#0}::{closure#0}>
   9: <rustc_thread_pool::job::StackJob<rustc_thread_pool::latch::SpinLatch, rustc_thread_pool::join::join_context<rustc_thread_pool::join::join::call<(), rustc_data_structures::sync::parallel::par_slice::par_rec<&rustc_span::def_id::LocalDefId, rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#1}::{closure#0}>::{closure#0}>::{closure#0}::{closure#0}>::{closure#1}>::{closure#0}, rustc_thread_pool::join::join::call<(), rustc_data_structures::sync::parallel::par_slice::par_rec<&rustc_span::def_id::LocalDefId, rustc_data_structures::sync::parallel::par_for_each_in<&rustc_span::def_id::LocalDefId, &[rustc_span::def_id::LocalDefId], <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners<rustc_interface::passes::run_required_analyses::{closure#1}::{closure#0}>::{closure#0}>::{closure#0}::{closure#0}>::{closure#2}>::{closure#0}, (), ()>::{closure#0}::{closure#0}, ()> as rustc_thread_pool::job::Job>::execute
  10: <rustc_thread_pool::registry::WorkerThread>::wait_or_steal_until_cold
  11: <rustc_thread_pool::registry::ThreadBuilder>::run