Closed
Description
Code
The following code does produce an error:
pub struct Problem<'a> {
pub dat: &'a [u8; Self::C],
}
impl<'a> Problem<'a> {
const C: usize = 0;
}
fn main() {}The following code does NOT produce an error:
pub struct Problem<'a> {
pub dat: &'a [u8; Problem::C],
}
impl<'a> Problem<'a> {
const C: usize = 0;
}
fn main() {}The following code does NOT produce an error:
pub struct Problem {
pub dat: [u8; Self::C],
}
impl Problem {
const C: usize = 0;
}
fn main() {}Meta
rustc --version --verbose:
rustc 1.48.0 (7eac88abb 2020-11-16)
binary: rustc
commit-hash: 7eac88abb2e57e752f3302f02be5f3ce3d7adfb4
commit-date: 2020-11-16
host: x86_64-unknown-linux-gnu
release: 1.48.0
LLVM version: 11.0
rustc --version --verbose:
rustc 1.49.0-beta.4 (877c7cbe1 2020-12-10)
binary: rustc
commit-hash: 877c7cbe142a373f93d38a23741dcc3a0a17a2af
commit-date: 2020-12-10
host: x86_64-unknown-linux-gnu
release: 1.49.0-beta.4
rustc --version --verbose:
rustc 1.50.0-nightly (eb4fc71dc 2020-12-17)
binary: rustc
commit-hash: eb4fc71dc9024f15a0c9cc44bcc10c861e9d585e
commit-date: 2020-12-17
host: x86_64-unknown-linux-gnu
release: 1.50.0-nightly
Error output
cargo build --verbose:
Compiling rustc_issue v0.1.0 (REDACTED/rustc_issue)
Running `rustc --crate-name rustc_issue --edition=2018 src/main.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C metadata=3e20745af1633f84 -C extra-filename=-3e20745af1633f84 --out-dir REDACTED/rustc_issue/target/debug/deps -C incremental=REDACTED/rustc_issue/target/debug/incremental -L dependency=REDACTED/rustc_issue/target/debug/deps`
error: internal compiler error: compiler/rustc_mir/src/borrow_check/universal_regions.rs:768:36: cannot convert `ReEarlyBound(0, 'a)` to a region vid
thread 'rustc' panicked at 'Box<Any>', compiler/rustc_errors/src/lib.rs:945:9
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 1.48.0 (7eac88abb 2020-11-16) running on x86_64-unknown-linux-gnu
note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type bin
note: some of the compiler flags provided by cargo are hidden
error: aborting due to previous error
error: could not compile `rustc_issue`
Caused by:
process didn't exit successfully: `rustc --crate-name rustc_issue --edition=2018 src/main.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C metadata=3e20745af1633f84 -C extra-filename=-3e20745af1633f84 --out-dir REDACTED/rustc_issue/target/debug/deps -C incremental=REDACTED/rustc_issue/target/debug/incremental -L dependency=REDACTED/rustc_issue/target/debug/deps` (exit code: 101)
Backtrace
thread 'rustc' panicked at 'Box<Any>', compiler/rustc_errors/src/lib.rs:945:9
stack backtrace:
0: std::panicking::begin_panic
1: rustc_errors::HandlerInner::bug
2: rustc_errors::Handler::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::bug_fmt
8: rustc_mir::borrow_check::universal_regions::UniversalRegionIndices::to_region_vid::{{closure}}
9: rustc_mir::borrow_check::universal_regions::UniversalRegionIndices::to_region_vid
10: rustc_mir::borrow_check::type_check::constraint_conversion::ConstraintConversion::convert_all
11: rustc_mir::borrow_check::type_check::type_check
12: rustc_mir::borrow_check::nll::compute_regions
13: rustc_mir::borrow_check::do_mir_borrowck
14: rustc_infer::infer::InferCtxtBuilder::enter
15: rustc_mir::borrow_check::mir_borrowck
16: core::ops::function::FnOnce::call_once
17: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
18: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
19: rustc_data_structures::stack::ensure_sufficient_stack
20: rustc_query_system::query::plumbing::force_query_impl
21: rustc_middle::ty::query::force_from_dep_node
22: rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_previous_green
23: rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_previous_green
24: rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_green_and_read
25: rustc_data_structures::stack::ensure_sufficient_stack
26: rustc_query_system::query::plumbing::get_query_impl
27: rustc_mir::interpret::eval_context::InterpCx<M>::load_mir
28: rustc_mir::const_eval::eval_queries::eval_to_allocation_raw_provider
29: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::eval_to_allocation_raw>::compute
30: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
31: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
32: rustc_data_structures::stack::ensure_sufficient_stack
33: rustc_query_system::query::plumbing::get_query_impl
34: rustc_mir::const_eval::eval_queries::eval_to_const_value_raw_provider
35: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::eval_to_const_value_raw>::compute
36: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
37: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
38: rustc_data_structures::stack::ensure_sufficient_stack
39: rustc_query_system::query::plumbing::get_query_impl
40: rustc_mir::const_eval::eval_queries::eval_to_const_value_raw_provider
41: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::eval_to_const_value_raw>::compute
42: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
43: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
44: rustc_data_structures::stack::ensure_sufficient_stack
45: rustc_query_system::query::plumbing::get_query_impl
46: rustc_middle::mir::interpret::queries::<impl rustc_middle::ty::context::TyCtxt>::const_eval_global_id
47: rustc_middle::mir::interpret::queries::<impl rustc_middle::ty::context::TyCtxt>::const_eval_resolve
48: rustc_middle::ty::consts::Const::eval
49: rustc_middle::ty::structural_impls::<impl rustc_middle::ty::fold::TypeFoldable for &rustc_middle::ty::TyS>::super_fold_with
50: <rustc_trait_selection::traits::project::AssocTypeNormalizer as rustc_middle::ty::fold::TypeFolder>::fold_ty
51: rustc_middle::ty::structural_impls::<impl rustc_middle::ty::fold::TypeFoldable for &rustc_middle::ty::TyS>::super_fold_with
52: <rustc_trait_selection::traits::project::AssocTypeNormalizer as rustc_middle::ty::fold::TypeFolder>::fold_ty
53: rustc_data_structures::stack::ensure_sufficient_stack
54: rustc_trait_selection::traits::project::normalize
55: <rustc_infer::infer::InferCtxt as rustc_trait_selection::infer::InferCtxtExt>::partially_normalize_associated_types_in
56: rustc_typeck::check::inherited::Inherited::normalize_associated_types_in
57: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
58: rustc_infer::infer::InferCtxtBuilder::enter
59: rustc_typeck::check::wfcheck::check_item_well_formed
60: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::check_item_well_formed>::compute
61: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
62: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
63: rustc_data_structures::stack::ensure_sufficient_stack
64: rustc_query_system::query::plumbing::get_query_impl
65: rustc_query_system::query::plumbing::ensure_query_impl
66: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
67: rustc_hir::hir::Crate::par_visit_all_item_likes
68: rustc_session::session::Session::track_errors
69: rustc_typeck::check_crate
70: rustc_interface::passes::analysis
71: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::analysis>::compute
72: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
73: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
74: rustc_data_structures::stack::ensure_sufficient_stack
75: rustc_query_system::query::plumbing::get_query_impl
76: rustc_interface::passes::QueryContext::enter
77: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
78: rustc_span::with_source_map
79: scoped_tls::ScopedKey<T>::set
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.