ICE: In stable handling unwrap() on a None.

[bsodmike]

My test suite started to die once I made some changes, but noticed it worked fine in beta.

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rustc --version --verbose:

rustc 1.58.1 (db9d1b20b 2022-01-20)
binary: rustc
commit-hash: db9d1b20bba1968c1ec1fc49616d4742c1725b4b
commit-date: 2022-01-20
host: x86_64-unknown-linux-gnu
release: 1.58.1
LLVM version: 13.0.0

Error output

thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', /rustc/db9d1b20bb
a1968c1ec1fc49616d4742c1725b4b/compiler/rustc_hir/src/definitions.rs:452:14
stack backtrace:
   0: rust_begin_unwind
             at /rustc/db9d1b20bba1968c1ec1fc49616d4742c1725b4b/library/std/src/panicking.r
s:498:5
   1: core::panicking::panic_fmt
             at /rustc/db9d1b20bba1968c1ec1fc49616d4742c1725b4b/library/core/src/panicking.
rs:107:14
   2: core::panicking::panic
             at /rustc/db9d1b20bba1968c1ec1fc49616d4742c1725b4b/library/core/src/panicking.
rs:48:5
   3: <rustc_middle::ty::context::TyCtxt>::def_path_hash_to_def_id
   4: <rustc_query_system::dep_graph::dep_node::DepNode<rustc_middle::dep_graph::dep_node::
DepKind> as rustc_middle::dep_graph::dep_node::DepNodeExt>::extract_def_id
   5: rustc_query_impl::query_callbacks::hir_owner::force_from_dep_node
   6: <rustc_middle::ty::context::TyCtxt as rustc_query_system::dep_graph::DepContext>::try
_force_from_dep_node
   7: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::De
pKind>>::try_mark_previous_green::<rustc_query_impl::plumbing::QueryCtxt>
   8: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::De
pKind>>::try_mark_previous_green::<rustc_query_impl::plumbing::QueryCtxt>
   9: rustc_query_system::query::plumbing::ensure_must_run::<rustc_query_impl::plumbing::Qu
eryCtxt, rustc_span::def_id::LocalDefId, &rustc_middle::ty::context::TypeckResults>
  10: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::check_mod
_liveness, rustc_query_impl::plumbing::QueryCtxt>
  11: <rustc_middle::hir::map::Map>::for_each_module::<rustc_interface::passes::analysis::{
closure#1}::{closure#1}::{closure#0}::{closure#0}>
  12: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{clo
sure#1}>
  13: rustc_interface::passes::analysis
  14: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::De
pKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), core::result::Result<(), rustc_
errors::ErrorReported>>
  14: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::De
pKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), core::result::Result<(), rustc_
errors::ErrorReported>>
  15: rustc_data_structures::stack::ensure_sufficient_stack::<(core::result::Result<(), rus
tc_errors::ErrorReported>, rustc_query_system::dep_graph::graph::DepNodeIndex), rustc_query
_system::query::plumbing::execute_job<rustc_query_impl::plumbing::QueryCtxt, (), core::resu
lt::Result<(), rustc_errors::ErrorReported>>::{closure#3}>
  16: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::
QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), core::result::Result<(), rus
tc_errors::ErrorReported>>>
  17: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
  18: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure
#1}::{closure#2}::{closure#3}, core::result::Result<(), rustc_errors::ErrorReported>>
  19: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#
1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker
>, rustc_errors::ErrorReported>>
  20: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorReported>,
rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::
ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#1}>
  21: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::set
up_callbacks_and_run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<c
ore::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#
1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#0}::{clo
sure#0}, core::result::Result<(), rustc_errors::ErrorReported>>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: internal compiler error: unexpected panic

note: 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 1.58.1 (db9d1b20b 2022-01-20) running on x86_64-unknown-linux-gnu

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental

[Aaron1011]

Can you update to the latest nightly? If this issue re-occurs, then you should get a more informative error message.

[workingjubilee]

Closing as a likely functional duplicate of this issue, several fixes were put in to place to resolve this, see the followup PRs:

• Trait selection provisional cache incorrectly handles DepNodes, leading to ICE #92987
• Don't perform any new queries while reading a query result on disk #91919
• Properly track DepNodes in trait evaluation provisional cache #93064