ICE unexpected DefKind for const alias to resolve to: Ctor(Struct, Const) #148953
Description
auto-reduced (treereduce-rust):
#![feature(min_generic_const_args)]
struct S;
impl S {
#[type_const]
const N: S = S;
}original:
#![feature(min_generic_const_args)]
struct S;
impl S {
#[type_const]
const N: S = S;
}
pub fn main() {}Version information
rustc 1.93.0-nightly (c91009892 2025-11-14)
binary: rustc
commit-hash: c91009892b4cd1776d4c9d85793166612195a03d
commit-date: 2025-11-14
host: x86_64-unknown-linux-gnu
release: 1.93.0-nightly
LLVM version: 21.1.5
Possibly related line of code:
rust/compiler/rustc_trait_selection/src/traits/normalize.rs
Lines 468 to 480 in c910098
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.wStjeEpq9h9m/rustc_testrunner_tmpdir_reporting.A15k88BBszU2/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
error[E0601]: `main` function not found in crate `mvce`
--> /tmp/icemaker_global_tempdir.wStjeEpq9h9m/rustc_testrunner_tmpdir_reporting.A15k88BBszU2/mvce.rs:6:2
|
6 | }
| ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.wStjeEpq9h9m/rustc_testrunner_tmpdir_reporting.A15k88BBszU2/mvce.rs`
thread 'rustc' (3706774) panicked at compiler/rustc_trait_selection/src/traits/normalize.rs:474:17:
internal error: entered unreachable code: unexpected `DefKind` for const alias to resolve to: Ctor(Struct, Const)
stack backtrace:
0: 0x7fdf1df24173 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h6a5c624d464fa678
1: 0x7fdf1e601d88 - core::fmt::write::hcd7baff1129f5a48
2: 0x7fdf1ded9736 - std::io::Write::write_fmt::h41ab9f2b71201a88
3: 0x7fdf1def0aac - std::panicking::default_hook::{{closure}}::h2ac413f3765072ef
4: 0x7fdf1def0603 - std::panicking::default_hook::hfd7bb8fab1f8d68b
5: 0x7fdf1cf2f317 - std[679d48c1f609a32f]::panicking::update_hook::<alloc[4ab92568d40b45eb]::boxed::Box<rustc_driver_impl[91301aa791a6027f]::install_ice_hook::{closure#1}>>::{closure#0}
6: 0x7fdf1def0e62 - std::panicking::panic_with_hook::hdd1313f07dd59db2
7: 0x7fdf1def0bf8 - std::panicking::panic_handler::{{closure}}::hb8ce0de48af20de1
8: 0x7fdf1deeab59 - std::sys::backtrace::__rust_end_short_backtrace::h1f9597559e00626c
9: 0x7fdf1decbc2d - __rustc[6200e4bf8384f687]::rust_begin_unwind
10: 0x7fdf1ae5af3c - core::panicking::panic_fmt::h56cea9fa98793212
11: 0x7fdf1e786fba - <rustc_trait_selection[cc384bab39185e43]::traits::normalize::AssocTypeNormalizer as rustc_type_ir[51d789c965f2be58]::fold::TypeFolder<rustc_middle[3193b4a475045f9b]::ty::context::TyCtxt>>::fold_const
12: 0x7fdf1d078367 - <rustc_infer[a4098c4d9951a433]::infer::at::At as rustc_trait_selection[cc384bab39185e43]::traits::normalize::NormalizeExt>::normalize::<rustc_middle[3193b4a475045f9b]::ty::consts::Const>
13: 0x7fdf1d0eeaa1 - rustc_hir_analysis[4a8b4e076f3e1a54]::check::wfcheck::check_type_const
14: 0x7fdf1ef1282a - rustc_hir_analysis[4a8b4e076f3e1a54]::check::wfcheck::enter_wf_checking_ctxt::<rustc_hir_analysis[4a8b4e076f3e1a54]::check::wfcheck::check_associated_item::{closure#0}>
15: 0x7fdf1ede37e3 - rustc_hir_analysis[4a8b4e076f3e1a54]::check::check::check_item_type
16: 0x7fdf1ede1d9c - rustc_hir_analysis[4a8b4e076f3e1a54]::check::wfcheck::check_well_formed
17: 0x7fdf1ede1d61 - rustc_query_impl[8184a5616bb2d907]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8184a5616bb2d907]::query_impl::check_well_formed::dynamic_query::{closure#2}::{closure#0}, rustc_middle[3193b4a475045f9b]::query::erase::Erased<[u8; 1usize]>>
18: 0x7fdf1ede162c - rustc_query_system[2d6f96cce5ccb8ff]::query::plumbing::try_execute_query::<rustc_query_impl[8184a5616bb2d907]::DynamicConfig<rustc_data_structures[6cc17db83c784504]::vec_cache::VecCache<rustc_span[501de4d049549587]::def_id::LocalDefId, rustc_middle[3193b4a475045f9b]::query::erase::Erased<[u8; 1usize]>, rustc_query_system[2d6f96cce5ccb8ff]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[8184a5616bb2d907]::plumbing::QueryCtxt, false>
19: 0x7fdf1ede1142 - rustc_query_impl[8184a5616bb2d907]::query_impl::check_well_formed::get_query_non_incr::__rust_end_short_backtrace
20: 0x7fdf1edde848 - rustc_hir_analysis[4a8b4e076f3e1a54]::check::wfcheck::check_type_wf
21: 0x7fdf1edde739 - rustc_query_impl[8184a5616bb2d907]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8184a5616bb2d907]::query_impl::check_type_wf::dynamic_query::{closure#2}::{closure#0}, rustc_middle[3193b4a475045f9b]::query::erase::Erased<[u8; 1usize]>>
22: 0x7fdf1f656254 - rustc_query_system[2d6f96cce5ccb8ff]::query::plumbing::try_execute_query::<rustc_query_impl[8184a5616bb2d907]::DynamicConfig<rustc_query_system[2d6f96cce5ccb8ff]::query::caches::SingleCache<rustc_middle[3193b4a475045f9b]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[8184a5616bb2d907]::plumbing::QueryCtxt, false>
23: 0x7fdf1f656036 - rustc_query_impl[8184a5616bb2d907]::query_impl::check_type_wf::get_query_non_incr::__rust_end_short_backtrace
24: 0x7fdf1e8dc87a - rustc_hir_analysis[4a8b4e076f3e1a54]::check_crate
25: 0x7fdf1e8e5077 - rustc_interface[79b32874b130099f]::passes::analysis
26: 0x7fdf1e8e4d33 - rustc_query_impl[8184a5616bb2d907]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8184a5616bb2d907]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[3193b4a475045f9b]::query::erase::Erased<[u8; 0usize]>>
27: 0x7fdf1f65c7d4 - rustc_query_system[2d6f96cce5ccb8ff]::query::plumbing::try_execute_query::<rustc_query_impl[8184a5616bb2d907]::DynamicConfig<rustc_query_system[2d6f96cce5ccb8ff]::query::caches::SingleCache<rustc_middle[3193b4a475045f9b]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[8184a5616bb2d907]::plumbing::QueryCtxt, false>
28: 0x7fdf1f65c40a - rustc_query_impl[8184a5616bb2d907]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
29: 0x7fdf1f8d6313 - <rustc_interface[79b32874b130099f]::passes::create_and_enter_global_ctxt<core[27292545e86084dd]::option::Option<rustc_interface[79b32874b130099f]::queries::Linker>, rustc_driver_impl[91301aa791a6027f]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[27292545e86084dd]::ops::function::FnOnce<(&rustc_session[f75d750e96f6b031]::session::Session, rustc_middle[3193b4a475045f9b]::ty::context::CurrentGcx, alloc[4ab92568d40b45eb]::sync::Arc<rustc_data_structures[6cc17db83c784504]::jobserver::Proxy>, &std[679d48c1f609a32f]::sync::once_lock::OnceLock<rustc_middle[3193b4a475045f9b]::ty::context::GlobalCtxt>, &rustc_data_structures[6cc17db83c784504]::sync::worker_local::WorkerLocal<rustc_middle[3193b4a475045f9b]::arena::Arena>, &rustc_data_structures[6cc17db83c784504]::sync::worker_local::WorkerLocal<rustc_hir[e91e01ab48700aa7]::Arena>, rustc_driver_impl[91301aa791a6027f]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
30: 0x7fdf1f723c05 - rustc_interface[79b32874b130099f]::interface::run_compiler::<(), rustc_driver_impl[91301aa791a6027f]::run_compiler::{closure#0}>::{closure#1}
31: 0x7fdf1f6ada3a - std[679d48c1f609a32f]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[79b32874b130099f]::util::run_in_thread_with_globals<rustc_interface[79b32874b130099f]::util::run_in_thread_pool_with_globals<rustc_interface[79b32874b130099f]::interface::run_compiler<(), rustc_driver_impl[91301aa791a6027f]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
32: 0x7fdf1f6ad728 - <<std[679d48c1f609a32f]::thread::Builder>::spawn_unchecked_<rustc_interface[79b32874b130099f]::util::run_in_thread_with_globals<rustc_interface[79b32874b130099f]::util::run_in_thread_pool_with_globals<rustc_interface[79b32874b130099f]::interface::run_compiler<(), rustc_driver_impl[91301aa791a6027f]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[27292545e86084dd]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
33: 0x7fdf1f6b35ef - std::sys::thread::unix::Thread::new::thread_start::h468da742cb4407a7
34: 0x7fdf190969cb - <unknown>
35: 0x7fdf1911aa0c - <unknown>
36: 0x0 - <unknown>
error: 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: please make sure that you have updated to the latest nightly
note: rustc 1.93.0-nightly (c91009892 2025-11-14) running on x86_64-unknown-linux-gnu
query stack during panic:
#0 [check_well_formed] checking that `<impl at /tmp/icemaker_global_tempdir.wStjeEpq9h9m/rustc_testrunner_tmpdir_reporting.A15k88BBszU2/mvce.rs:3:1: 3:7>::N` is well-formed
#1 [check_type_wf] checking that types are well-formed
#2 [analysis] running analysis passes on crate `mvce`
end of query stack
error: aborting due to 1 previous error; 1 warning emitted
For more information about this error, try `rustc --explain E0601`.
@rustbot label +F-min_generic_const_args