Internal Compiler Error: 'rustc' panicked at 'failed to lookup SourceFile in new context'

[DrRuhe]

I've gotten an Internal Compiler Error.

I was changing a &str constant in a test case and suddenly the error logged below popped up.

It seems to me as the error is somehow related to cargo/rustc caching for incremental compile.

Code

Before error:

[...]
#[cfg(test)]
mod tests {

    [...]

    #[test]
    fn test_it_works() {
        let query = "wc count all lines in file";
        [...]
    }
}

Threw error:

[...]
#[cfg(test)]
mod tests {

    [...]

    #[test]
    fn test_it_works() {
        let query = "count lines file";
        [...]
    }
}

Since this should have nothing to do with the error itself, I doubt I can create a reliable minimal working example.

Meta

rustc --version --verbose:

rustc 1.59.0-nightly (34926f0a1 2021-12-22)
binary: rustc
commit-hash: 34926f0a1681458588a2d4240c0715ef9eff7d35
commit-date: 2021-12-22
host: x86_64-unknown-linux-gnu
release: 1.59.0-nightly
LLVM version: 13.0.0

Error output

thread 'rustc' panicked at 'failed to lookup `SourceFile` in new context', compiler/rustc_query_impl/src/on_disk_cache.rs:500:22
stack backtrace:
   0: rust_begin_unwind
             at /rustc/34926f0a1681458588a2d4240c0715ef9eff7d35/library/std/src/panicking.rs:498:5
   1: core::panicking::panic_fmt
             at /rustc/34926f0a1681458588a2d4240c0715ef9eff7d35/library/core/src/panicking.rs:107:14
   2: core::panicking::panic_display
             at /rustc/34926f0a1681458588a2d4240c0715ef9eff7d35/library/core/src/panicking.rs:63:5
   3: core::option::expect_failed
             at /rustc/34926f0a1681458588a2d4240c0715ef9eff7d35/library/core/src/option.rs:1819:5
   4: <rustc_span::span_encoding::Span as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
   5: <rustc_middle::ty::VariantDef as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
   6: <rustc_query_impl::on_disk_cache::CacheDecoder as rustc_serialize::serialize::Decoder>::read_seq::<alloc::vec::Vec<rustc_middle::ty::VariantDef>, <alloc::vec::Vec<rustc_middle::ty::VariantDef> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>
   7: <rustc_middle::ty::adt::AdtDef as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
   8: <rustc_middle::ty::sty::TyKind as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
   9: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
  10: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode
  11: <rustc_query_impl::on_disk_cache::CacheDecoder as rustc_serialize::serialize::Decoder>::read_map::<std::collections::hash::map::HashMap<rustc_hir::hir_id::ItemLocalId, &rustc_middle::ty::TyS, core::hash::BuildHasherDefault<rustc_hash::FxHasher>>, <std::collections::hash::map::HashMap<rustc_hir::hir_id::ItemLocalId, &rustc_middle::ty::TyS, core::hash::BuildHasherDefault<rustc_hash::FxHasher>> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>
  12: <rustc_middle::ty::context::TypeckResults as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}
  13: <rustc_query_impl::on_disk_cache::OnDiskCache>::try_load_query_result::<&rustc_middle::ty::context::TypeckResults>
  14: rustc_query_system::query::plumbing::try_load_from_disk_and_cache_in_memory::<rustc_query_impl::plumbing::QueryCtxt, rustc_span::def_id::LocalDefId, &rustc_middle::ty::context::TypeckResults>
  15: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalDefId, &rustc_middle::ty::context::TypeckResults>>
  16: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck
  17: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_body
  18: rustc_hir::intravisit::walk_expr::<rustc_passes::liveness::IrMaps>
  19: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  20: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  21: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_body
  22: rustc_hir::intravisit::walk_expr::<rustc_passes::liveness::IrMaps>
  23: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  24: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  25: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  26: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_body
  27: rustc_hir::intravisit::walk_expr::<rustc_passes::liveness::IrMaps>
  28: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  29: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  30: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  31: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  32: rustc_hir::intravisit::walk_expr::<rustc_passes::liveness::IrMaps>
  33: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  34: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  35: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_local
  36: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_expr
  37: <rustc_passes::liveness::IrMaps as rustc_hir::intravisit::Visitor>::visit_body
  38: rustc_hir::intravisit::walk_impl_item::<rustc_passes::liveness::IrMaps>
  39: <rustc_middle::hir::map::Map>::visit_item_likes_in_module::<rustc_hir::intravisit::DeepVisitor<rustc_passes::liveness::IrMaps>>
  40: rustc_passes::liveness::check_mod_liveness
  41: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::LocalDefId, ()>
  42: rustc_data_structures::stack::ensure_sufficient_stack::<((), rustc_query_system::dep_graph::graph::DepNodeIndex), rustc_query_system::query::plumbing::execute_job<rustc_query_impl::plumbing::QueryCtxt, rustc_span::def_id::LocalDefId, ()>::{closure#3}>
  43: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalDefId, ()>>
  44: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::check_mod_liveness, rustc_query_impl::plumbing::QueryCtxt>
  45: <core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::passes::analysis::{closure#1}::{closure#1}> as core::ops::function::FnOnce<()>>::call_once
  46: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#1}>
  47: rustc_interface::passes::analysis
  48: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), core::result::Result<(), rustc_errors::ErrorReported>>
  49: rustc_data_structures::stack::ensure_sufficient_stack::<(core::result::Result<(), rustc_errors::ErrorReported>, rustc_query_system::dep_graph::graph::DepNodeIndex), rustc_query_system::query::plumbing::execute_job<rustc_query_impl::plumbing::QueryCtxt, (), core::result::Result<(), rustc_errors::ErrorReported>>::{closure#3}>
  50: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), core::result::Result<(), rustc_errors::ErrorReported>>>
  51: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
  52: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#3}, core::result::Result<(), rustc_errors::ErrorReported>>
  53: <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>>
  54: 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}>
  55: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#0}::{closure#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 1.59.0-nightly (34926f0a1 2021-12-22) running on x86_64-unknown-linux-gnu

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

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

query stack during panic:
#0 [typeck] type-checking `<impl at tldr_search_engine/src/main.rs:15:10: 15:16>::from_arg_matches::{closure#0}::{closure#0}::{closure#0}`
#1 [check_mod_liveness] checking liveness of variables in top-level module
#2 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `ttse`
The terminal process "cargo 'test', '--package', 'ttse', '--bin', 'ttse', '--', 'tests::test_it_works', '--exact', '--nocapture'" terminated with exit code: 101.

[ehuss]

Thanks for the report! This is a known problem with incremental compilation on the nightly channel. You can delete the incremental cache, or use CARGO_INCREMENTAL=0 environment variable to disable it.

Closing as a duplicate of #92163.