Closed
Description
snippet:
//@compile-flags: --crate-type=lib
#![feature(min_generic_const_args)]
trait A<B> {
fn c();
}
impl A<[usize; d]> for () {}
fn d() {
let e = <()>::c;
e.f()
}Version information
rustc 1.86.0-nightly (ffa9afef1 2025-02-11)
binary: rustc
commit-hash: ffa9afef183a3496a277c8da2e61403582a99508
commit-date: 2025-02-11
host: x86_64-unknown-linux-gnu
release: 1.86.0-nightly
LLVM version: 19.1.7
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc --crate-type=lib
Program output
warning: the feature `min_generic_const_args` is incomplete and may not be safe to use and/or cause compiler crashes
--> /tmp/icemaker_global_tempdir.IbyiDuC5Lmc8/rustc_testrunner_tmpdir_reporting.XYo951OOreeE/mvce.rs:1:12
|
1 | #![feature(min_generic_const_args)]
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #132980 <https://github.com/rust-lang/rust/issues/132980> for more information
= note: `#[warn(incomplete_features)]` on by default
warning: trait `A` is never used
--> /tmp/icemaker_global_tempdir.IbyiDuC5Lmc8/rustc_testrunner_tmpdir_reporting.XYo951OOreeE/mvce.rs:2:7
|
2 | trait A<B> {
| ^
|
= note: `#[warn(dead_code)]` on by default
warning: function `d` is never used
--> /tmp/icemaker_global_tempdir.IbyiDuC5Lmc8/rustc_testrunner_tmpdir_reporting.XYo951OOreeE/mvce.rs:6:4
|
6 | fn d() {
| ^
warning: 3 warnings emitted
note: no errors encountered even though delayed bugs were created
note: those delayed bugs will now be shown as internal compiler errors
error: internal compiler error: fn items cannot be used as const args
--> /tmp/icemaker_global_tempdir.IbyiDuC5Lmc8/rustc_testrunner_tmpdir_reporting.XYo951OOreeE/mvce.rs:5:16
|
5 | impl A<[usize; d]> for () {}
| ^
|
note: delayed at compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs:2157:60
0: <rustc_errors::DiagCtxtInner>::emit_diagnostic
1: <rustc_errors::DiagCtxtHandle>::emit_diagnostic
2: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
3: <rustc_errors::DiagCtxtHandle>::span_delayed_bug::<rustc_span::span_encoding::Span, &str>
4: <rustc_middle::ty::consts::Const>::new_error_with_message::<rustc_span::span_encoding::Span, &str>
5: <dyn rustc_hir_analysis::hir_ty_lowering::HirTyLowerer>::lower_const_arg.cold
6: <dyn rustc_hir_analysis::hir_ty_lowering::HirTyLowerer>::lower_ty
7: <dyn rustc_hir_analysis::hir_ty_lowering::HirTyLowerer>::lower_generic_args_of_path::{closure#0}
8: <dyn rustc_hir_analysis::hir_ty_lowering::HirTyLowerer>::lower_impl_trait_ref
9: rustc_hir_analysis::collect::impl_trait_header
10: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::impl_trait_header::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 24]>>
11: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefIdCache<rustc_middle::query::erase::Erased<[u8; 24]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
12: rustc_query_impl::query_impl::impl_trait_header::get_query_non_incr::__rust_end_short_backtrace
13: <rustc_hir_analysis::collect::CollectItemTypesVisitor as rustc_hir::intravisit::Visitor>::visit_item
14: rustc_hir_analysis::check::wfcheck::check_well_formed
15: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::check_well_formed::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 1]>>
16: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 1]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
17: rustc_query_impl::query_impl::check_well_formed::get_query_non_incr::__rust_end_short_backtrace
18: rustc_hir_analysis::check::wfcheck::check_mod_type_wf
19: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::check_mod_type_wf::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 1]>>
20: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalModDefId, rustc_middle::query::erase::Erased<[u8; 1]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
21: rustc_query_impl::query_impl::check_mod_type_wf::get_query_non_incr::__rust_end_short_backtrace
22: rustc_hir_analysis::check_crate
23: rustc_interface::passes::run_required_analyses
24: rustc_interface::passes::analysis
25: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 0]>>
26: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
27: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
28: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
29: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
30: std::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
31: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
32: std::sys::pal::unix::thread::Thread::new::thread_start
33: <unknown>
34: <unknown>
--> /tmp/icemaker_global_tempdir.IbyiDuC5Lmc8/rustc_testrunner_tmpdir_reporting.XYo951OOreeE/mvce.rs:5:16
|
5 | impl A<[usize; d]> for () {}
| ^
error: internal compiler error: no type-dependent def for method call
--> /tmp/icemaker_global_tempdir.IbyiDuC5Lmc8/rustc_testrunner_tmpdir_reporting.XYo951OOreeE/mvce.rs:8:5
|
8 | e.f()
| ^^^^^
|
note: delayed at compiler/rustc_privacy/src/lib.rs:1232:26
0: <rustc_errors::DiagCtxtInner>::emit_diagnostic
1: <rustc_errors::DiagCtxtHandle>::emit_diagnostic
2: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
3: <rustc_privacy::TypePrivacyVisitor as rustc_hir::intravisit::Visitor>::visit_expr
4: <rustc_privacy::TypePrivacyVisitor as rustc_hir::intravisit::Visitor>::visit_expr
5: rustc_privacy::check_mod_privacy
6: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::check_mod_privacy::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 0]>>
7: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalModDefId, rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
8: rustc_query_impl::query_impl::check_mod_privacy::get_query_non_incr::__rust_end_short_backtrace
9: rustc_interface::passes::analysis
10: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 0]>>
11: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
12: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
13: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
14: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
15: std::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
16: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
17: std::sys::pal::unix::thread::Thread::new::thread_start
18: <unknown>
19: <unknown>
--> /tmp/icemaker_global_tempdir.IbyiDuC5Lmc8/rustc_testrunner_tmpdir_reporting.XYo951OOreeE/mvce.rs:8:5
|
8 | e.f()
| ^^^^^
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: please make sure that you have updated to the latest nightly
note: rustc 1.86.0-nightly (ffa9afef1 2025-02-11) running on x86_64-unknown-linux-gnu
note: compiler flags: --crate-type lib -Z dump-mir-dir=dir
query stack during panic:
end of query stack
@rustbot label +F-min_generic_const_args