ICE invalid Res .. for const path #150749
Description
snippet:
#![feature(min_generic_const_args)]
trait CollectArray<A> {
fn inner_array(self);
}
impl<A, I> CollectArray<A> for I {
fn inner_array(self) {
let temp_ptr: [A; Self];
}
}
fn main() {}Version information
rustc 1.94.0-nightly (4d73a008e 2026-01-06)
binary: rustc
commit-hash: 4d73a008eaf6ba3ca067a3221e5c00602e33a5f2
commit-date: 2026-01-06
host: x86_64-unknown-linux-gnu
release: 1.94.0-nightly
LLVM version: 21.1.8
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc
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.vyLbJJh66pGl/rustc_testrunner_tmpdir_reporting.bljQfewf7ESR/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 `CollectArray` is never used
--> /tmp/icemaker_global_tempdir.vyLbJJh66pGl/rustc_testrunner_tmpdir_reporting.bljQfewf7ESR/mvce.rs:3:7
|
3 | trait CollectArray<A> {
| ^^^^^^^^^^^^
|
= note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
warning: 2 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: invalid Res SelfCtor(DefId(0:6 ~ mvce[7e87]::{impl#0})) for const path
--> /tmp/icemaker_global_tempdir.vyLbJJh66pGl/rustc_testrunner_tmpdir_reporting.bljQfewf7ESR/mvce.rs:8:27
|
8 | let temp_ptr: [A; Self];
| ^^^^
|
note: delayed at /rustc-dev/4d73a008eaf6ba3ca067a3221e5c00602e33a5f2/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs:2687:28
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, alloc::string::String>
4: <dyn rustc_hir_analysis::hir_ty_lowering::HirTyLowerer>::lower_resolved_const_path.cold
5: <dyn rustc_hir_analysis::hir_ty_lowering::HirTyLowerer>::lower_const_arg
6: <dyn rustc_hir_analysis::hir_ty_lowering::HirTyLowerer>::lower_ty
7: <rustc_hir_typeck::gather_locals::GatherLocalsVisitor>::declare
8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_block
9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
10: rustc_hir_typeck::check::check_fn
11: rustc_hir_typeck::typeck_with_inspect::{closure#0}
12: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
13: 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; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
14: rustc_query_impl::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
15: <rustc_middle::ty::context::TyCtxt>::par_hir_body_owners::<rustc_hir_analysis::check_crate::{closure#2}>::{closure#0}
16: rustc_hir_analysis::check_crate
17: rustc_interface::passes::analysis
18: 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]>>
19: 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>
20: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
21: <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} as core::ops::function::FnOnce<(&rustc_session::session::Session, rustc_middle::ty::context::CurrentGcx, alloc::sync::Arc<rustc_data_structures::jobserver::Proxy>, &std::sync::once_lock::OnceLock<rustc_middle::ty::context::GlobalCtxt>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_middle::arena::Arena>, &rustc_data_structures::sync::worker_local::WorkerLocal<rustc_hir::Arena>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
22: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
23: 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}, ()>
24: <std::thread::lifecycle::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}
25: <std::sys::thread::unix::Thread>::new::thread_start
26: <unknown>
27: <unknown>
--> /tmp/icemaker_global_tempdir.vyLbJJh66pGl/rustc_testrunner_tmpdir_reporting.bljQfewf7ESR/mvce.rs:8:27
|
8 | let temp_ptr: [A; Self];
| ^^^^
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 1.94.0-nightly (4d73a008e 2026-01-06) running on x86_64-unknown-linux-gnu
query stack during panic:
end of query stack
@rustbot label +F-min_generic_const_args