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Description
Code
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rustc --version --verbose:
rustc 1.55.0 (c8dfcfe04 2021-09-06)
binary: rustc
commit-hash: c8dfcfe046a7680554bf4eb612bad840e7631c4b
commit-date: 2021-09-06
host: x86_64-apple-darwin
release: 1.55.0
LLVM version: 12.0.1
Error output
thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler/rustc_query_impl/src/on_disk_cache.rs:890:14
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
Backtrace
thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler/rustc_query_impl/src/on_disk_cache.rs:890:14
stack backtrace:
0: _rust_begin_unwind
1: core::panicking::panic_fmt
2: core::panicking::panic
3: rustc_middle::ty::generics::_DERIVE_rustc_serialize_Decodable_D_FOR_GenericParamDef::<impl rustc_serialize::serialize::Decodable<__D> for rustc_middle::ty::generics::GenericParamDef>::decode
4: rustc_serialize::serialize::Decoder::read_seq
5: rustc_middle::ty::generics::_DERIVE_rustc_serialize_Decodable_D_FOR_Generics::<impl rustc_serialize::serialize::Decodable<__D> for rustc_middle::ty::generics::Generics>::decode
6: rustc_query_impl::on_disk_cache::OnDiskCache::try_load_query_result
7: rustc_query_impl::plumbing::<impl rustc_query_system::query::config::QueryDescription<rustc_query_impl::plumbing::QueryCtxt> for rustc_query_impl::queries::generics_of>::try_load_from_disk
8: rustc_query_system::query::plumbing::load_from_disk_and_cache_in_memory
9: rustc_data_structures::stack::ensure_sufficient_stack
10: rustc_query_system::query::plumbing::get_query_impl
11: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::generics_of
12: rustc_middle::ty::subst::<impl rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg>>::for_item
13: rustc_infer::infer::InferCtxt::fresh_substs_for_item
14: rustc_trait_selection::traits::select::SelectionContext::match_impl
15: rustc_infer::infer::InferCtxt::probe
16: rustc_middle::ty::trait_def::<impl rustc_middle::ty::context::TyCtxt>::for_each_relevant_impl
17: rustc_trait_selection::traits::select::candidate_assembly::<impl rustc_trait_selection::traits::select::SelectionContext>::assemble_candidates_from_impls
18: rustc_trait_selection::traits::select::candidate_assembly::<impl rustc_trait_selection::traits::select::SelectionContext>::assemble_candidates
19: rustc_trait_selection::traits::select::candidate_assembly::<impl rustc_trait_selection::traits::select::SelectionContext>::candidate_from_obligation_no_cache
20: rustc_query_system::dep_graph::graph::DepGraph<K>::with_anon_task
21: rustc_trait_selection::traits::select::candidate_assembly::<impl rustc_trait_selection::traits::select::SelectionContext>::candidate_from_obligation
22: rustc_trait_selection::traits::select::SelectionContext::select
23: rustc_trait_selection::traits::fulfill::FulfillProcessor::process_trait_obligation
24: rustc_trait_selection::traits::fulfill::FulfillProcessor::progress_changed_obligations
25: rustc_data_structures::obligation_forest::ObligationForest<O>::process_obligations
26: <rustc_trait_selection::traits::fulfill::FulfillmentContext as rustc_infer::traits::engine::TraitEngine>::select_where_possible
27: rustc_typeck::check::op::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::lookup_op_method
28: rustc_typeck::check::op::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_overloaded_binop
29: rustc_typeck::check::op::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_binop
30: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
31: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_coercable_to_type
32: rustc_typeck::check::op::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_binop
33: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
34: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
35: rustc_typeck::check::_match::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_match
36: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
37: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
38: rustc_typeck::check::fn_ctxt::checks::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_block_with_expected
39: rustc_typeck::check::fn_ctxt::checks::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_block_no_value
40: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
41: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
42: rustc_typeck::check::fn_ctxt::checks::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_stmt
43: rustc_typeck::check::fn_ctxt::checks::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_block_with_expected
44: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
45: rustc_typeck::check::expr::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_return_expr
46: rustc_typeck::check::check::check_fn
47: rustc_infer::infer::InferCtxtBuilder::enter
48: rustc_typeck::check::typeck
49: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
50: rustc_data_structures::stack::ensure_sufficient_stack
51: rustc_query_system::query::plumbing::force_query_with_job
52: rustc_query_system::query::plumbing::get_query_impl
53: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck
54: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::par_body_owners
55: rustc_typeck::check::typeck_item_bodies
56: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
57: rustc_data_structures::stack::ensure_sufficient_stack
58: rustc_query_system::query::plumbing::force_query_with_job
59: rustc_query_system::query::plumbing::get_query_impl
60: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
61: rustc_session::utils::<impl rustc_session::session::Session>::time
62: rustc_typeck::check_crate
63: rustc_interface::passes::analysis
64: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
65: rustc_data_structures::stack::ensure_sufficient_stack
66: rustc_query_system::query::plumbing::force_query_with_job
67: rustc_query_system::query::plumbing::get_query_impl
68: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
69: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
70: rustc_span::with_source_map
71: rustc_interface::interface::create_compiler_and_run
72: scoped_tls::ScopedKey<T>::set
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.