ICE: compiler/rustc_typeck/src/check/fn_ctxt/_impl.rs:130:13: no type for local variable local 0

[chengniansun]

Code

fn main() {
    yield || for _ in 0 {}
}

Meta

rustc --version --verbose:

rustc 1.49.0-nightly (4f7612ac1 2020-10-31)
binary: rustc
commit-hash: 4f7612ac1499258025077f1fd05d2f429f9accfb
commit-date: 2020-10-31
host: x86_64-unknown-linux-gnu
release: 1.49.0-nightly

Error output

error[E0658]: yield syntax is experimental
 --> reduced_mutant.rs:2:5
  |
2 |     yield || for _ in 0 {}
  |     ^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
  = help: add `#![feature(generators)]` to the crate attributes to enable

error[E0627]: yield expression outside of generator literal
 --> reduced_mutant.rs:2:5
  |
2 |     yield || for _ in 0 {}
  |     ^^^^^^^^^^^^^^^^^^^^^^

error: internal compiler error: compiler/rustc_typeck/src/check/fn_ctxt/_impl.rs:130:13: no type for local variable local 0 (hir_id=HirId { owner: DefId(0:3 ~ reduced_mutant[317d]::main), local_id: 23 })
 --> reduced_mutant.rs:2:23
  |
2 |     yield || for _ in 0 {}
  |                       ^

thread 'rustc' panicked at 'Box<Any>', /rustc/4f7612ac1499258025077f1fd05d2f429f9accfb/compiler/rustc_errors/src/lib.rs:888:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

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 1.49.0-nightly (4f7612ac1 2020-10-31) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [typeck] type-checking `main`
#1 [typeck_item_bodies] type-checking all item bodies
end of query stack
error: aborting due to 3 previous errors

Some errors have detailed explanations: E0627, E0658.
For more information about an error, try `rustc --explain E0627`.

Backtrace

thread 'rustc' panicked at 'Box<Any>', /rustc/4f7612ac1499258025077f1fd05d2f429f9accfb/compiler/rustc_errors/src/lib.rs:888:9
stack backtrace:
   0: std::panicking::begin_panic
   1: rustc_errors::HandlerInner::span_bug
   2: rustc_errors::Handler::span_bug
   3: rustc_middle::util::bug::opt_span_bug_fmt::{{closure}}
   4: rustc_middle::ty::context::tls::with_opt::{{closure}}
   5: rustc_middle::ty::context::tls::with_opt
   6: rustc_middle::util::bug::opt_span_bug_fmt
   7: rustc_middle::util::bug::span_bug_fmt
   8: rustc_typeck::check::fn_ctxt::_impl::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::local_ty::{{closure}}
   9: rustc_typeck::check::fn_ctxt::_impl::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::local_ty
  10: <rustc_typeck::check::writeback::WritebackCx as rustc_hir::intravisit::Visitor>::visit_local
  11: rustc_hir::intravisit::walk_expr
  12: <rustc_typeck::check::writeback::WritebackCx as rustc_hir::intravisit::Visitor>::visit_expr
  13: rustc_hir::intravisit::walk_expr
  14: <rustc_typeck::check::writeback::WritebackCx as rustc_hir::intravisit::Visitor>::visit_expr
  15: <rustc_typeck::check::writeback::WritebackCx as rustc_hir::intravisit::Visitor>::visit_expr
  16: <rustc_typeck::check::writeback::WritebackCx as rustc_hir::intravisit::Visitor>::visit_expr
  17: <rustc_typeck::check::writeback::WritebackCx as rustc_hir::intravisit::Visitor>::visit_expr
  18: <rustc_typeck::check::writeback::WritebackCx as rustc_hir::intravisit::Visitor>::visit_expr
  19: rustc_typeck::check::writeback::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::resolve_type_vars_in_body
  20: rustc_infer::infer::InferCtxtBuilder::enter
  21: rustc_typeck::check::typeck
  22: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::typeck>::compute
  23: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  24: rustc_data_structures::stack::ensure_sufficient_stack
  25: rustc_query_system::query::plumbing::get_query_impl
  26: rustc_query_system::query::plumbing::ensure_query_impl
  27: rustc_typeck::check::typeck_item_bodies
  28: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::typeck_item_bodies>::compute
  29: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  30: rustc_data_structures::stack::ensure_sufficient_stack
  31: rustc_query_system::query::plumbing::get_query_impl
  32: rustc_typeck::check_crate
  33: rustc_interface::passes::analysis
  34: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::analysis>::compute
  35: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  36: rustc_data_structures::stack::ensure_sufficient_stack
  37: rustc_query_system::query::plumbing::get_query_impl
  38: rustc_interface::passes::QueryContext::enter
  39: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
  40: rustc_span::with_source_map
  41: scoped_tls::ScopedKey<T>::set
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

NOTE: The bug is found by our work-in-progress compiler testing tool Kira, and the test program is reduced/minimized by Perses

[JohnTitor]

Assigning P-medium as discussed as part of the Prioritization Working Group procedure and removing I-prioritize.

[matthiaskrgr]

This ICEs since 1.33
@rustbot modify labels: +regression-from-stable-to-stable