Open
Description
auto-reduced (treereduce-rust):
#![feature(generic_const_exprs)]
#![feature(min_generic_const_args)]
const fn identity<const T: identity::<{ identity::<{ identity::<{ identity::<{ /**...*/ }> }>() }>() }>>() -> u32 { }
#[derive(, , )]
pub struct ConstU32<const U: identity>;
pub fn new() -> ConstU32<{ u32() }> {
}
fn iv() {
let iv = ();
assert_eq!;
}original:
// run-pass
const fn identity<const T: identity::<{ identity::<{ identity::<{ identity::<{ /**...*/identity::<3>() }> }>() }>() }>>() -> u32 { identity::<{ identity::<{ u32::<{ identity::<{ /**...*/identity::<3>() }>() }>() }>() }> }
#[derive(Eq, PartialEq, Debug)]
pub struct ConstU32<const U: identity>;
pub fn new() -> ConstU32<{ u32() }> {
ConstU32::<{ identity::<{ identity::<{ identity::<{ identity::<{ /**...*/identity::<3>() }> }>() }>() }>() }>
}
fn iv() {
let iv = identity::<3>();
assert_eq!(v, ConstU32::<3>);
}Version information
rustc 1.90.0-nightly (6268d0aa3 2025-07-03)
binary: rustc
commit-hash: 6268d0aa34b46981533b09827c1454b8cf27e032
commit-date: 2025-07-03
host: x86_64-unknown-linux-gnu
release: 1.90.0-nightly
LLVM version: 20.1.7
Possibly related line of code:
rust/compiler/rustc_hir_analysis/src/collect/generics_of.rs
Lines 220 to 232 in 6268d0a
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc -Zcrate-attr=feature(generic_const_exprs) -Zcrate-attr=feature(min_generic_const_args)
Program output
error[E0585]: found a documentation comment that doesn't document anything
--> /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:3:80
|
3 | const fn identity<const T: identity::<{ identity::<{ identity::<{ identity::<{ /**...*/ }> }>() }>() }>>() -> u32 { }
| ^^^^^^^^
|
= help: doc comments must come before what they document, if a comment was intended use `//`
error: expected one of `(`, `[`, or `{`, found `;`
--> /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:14:13
|
14 | assert_eq!;
| ^ expected one of `(`, `[`, or `{`
error: expected unsuffixed literal, found `,`
--> /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:5:10
|
5 | #[derive(, , )]
| ^
error[E0573]: expected type, found function `identity`
--> /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:3:28
|
3 | const fn identity<const T: identity::<{ identity::<{ identity::<{ identity::<{ /**...*/ }> }>() }>() }>>() -> u32 { }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not a type
error[E0573]: expected type, found function `identity`
--> /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:6:30
|
6 | pub struct ConstU32<const U: identity>;
| ^^^^^^^^ not a type
warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
--> <crate attribute>:1:12
|
1 | #![feature(generic_const_exprs)]
| ^^^^^^^^^^^^^^^^^^^
|
= note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
= note: `#[warn(incomplete_features)]` on by default
warning: the feature `min_generic_const_args` is incomplete and may not be safe to use and/or cause compiler crashes
--> <crate attribute>:1:12
|
1 | #![feature(min_generic_const_args)]
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #132980 <https://github.com/rust-lang/rust/issues/132980> for more information
error[E0601]: `main` function not found in crate `mvce`
--> /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:15:2
|
15 | }
| ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs`
error[E0423]: expected function, found builtin type `u32`
--> /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:8:28
|
8 | pub fn new() -> ConstU32<{ u32() }> {
| ^^^ not a function
error[E0308]: mismatched types
--> /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:3:111
|
3 | const fn identity<const T: identity::<{ identity::<{ identity::<{ identity::<{ /**...*/ }> }>() }>() }>>() -> u32 { }
| -------- implicitly returns `()` as its body has no tail or `return` expression ^^^ expected `u32`, found `()`
error[E0308]: mismatched types
--> /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:8:17
|
8 | pub fn new() -> ConstU32<{ u32() }> {
| --- ^^^^^^^^^^^^^^^^^^^ expected `ConstU32<{ u32() }>`, found `()`
| |
| implicitly returns `()` as its body has no tail or `return` expression
|
= note: expected struct `ConstU32<{ u32() }>`
found unit type `()`
error: internal compiler error: compiler/rustc_hir_analysis/src/collect/generics_of.rs:226:14: unhandled node ConstArg(ConstArg { hir_id: HirId(DefId(0:3 ~ mvce[5a8b]::identity).19), kind: Path(Resolved(None, Path { span: /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:3:67: 3:91 (#0), res: Def(Fn, DefId(0:3 ~ mvce[5a8b]::identity)), segments: [PathSegment { ident: identity#0, hir_id: HirId(DefId(0:3 ~ mvce[5a8b]::identity).18), res: Def(Fn, DefId(0:3 ~ mvce[5a8b]::identity)), args: Some(GenericArgs { args: [Const(ConstArg { hir_id: HirId(DefId(0:3 ~ mvce[5a8b]::identity).17), kind: Anon(AnonConst { hir_id: HirId(DefId(0:3 ~ mvce[5a8b]::identity).14), def_id: DefId(0:8 ~ mvce[5a8b]::identity::{constant#0}::{constant#0}::{constant#0}::{constant#0}), body: BodyId { hir_id: HirId(DefId(0:3 ~ mvce[5a8b]::identity).15) }, span: /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:3:78: 3:90 (#0) }) })], constraints: [], parenthesized: No, span_ext: /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:3:77: 3:91 (#0) }), infer_args: false }] })) })
--> /tmp/icemaker_global_tempdir.pxFd3gBGjYZY/rustc_testrunner_tmpdir_reporting.RwlW8FIEkoHd/mvce.rs:3:67
|
3 | const fn identity<const T: identity::<{ identity::<{ identity::<{ identity::<{ /**...*/ }> }>() }>() }>>() -> u32 { }
| ^^^^^^^^^^^^^^^^^^^^^^^^
thread 'rustc' panicked at compiler/rustc_hir_analysis/src/collect/generics_of.rs:226:14:
Box<dyn Any>
stack backtrace:
0: 0x73e490f30613 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h777b4d5b7dbb3ab3
1: 0x73e4916027ff - core::fmt::write::hf3b23f29da02ec3a
2: 0x73e490f26143 - std::io::Write::write_fmt::h2f0022cea6beafc7
3: 0x73e490f30472 - std::sys::backtrace::BacktraceLock::print::h2b5e4c19e9e70c81
4: 0x73e490f33f6a - std::panicking::default_hook::{{closure}}::hb4ba057717dbced5
5: 0x73e490f33aef - std::panicking::default_hook::hf6ce2125dbdbfae1
6: 0x73e48fffed03 - std[3c46b9eb67f00f78]::panicking::update_hook::<alloc[6a08b52f7c63c4c5]::boxed::Box<rustc_driver_impl[705e5eaf62d438bb]::install_ice_hook::{closure#1}>>::{closure#0}
7: 0x73e490f347bb - std::panicking::rust_panic_with_hook::h974459b183641fc7
8: 0x73e4900389c1 - std[3c46b9eb67f00f78]::panicking::begin_panic::<rustc_errors[c81a47bb03d10c49]::ExplicitBug>::{closure#0}
9: 0x73e49002cd86 - std[3c46b9eb67f00f78]::sys::backtrace::__rust_end_short_backtrace::<std[3c46b9eb67f00f78]::panicking::begin_panic<rustc_errors[c81a47bb03d10c49]::ExplicitBug>::{closure#0}, !>
10: 0x73e49002cb77 - std[3c46b9eb67f00f78]::panicking::begin_panic::<rustc_errors[c81a47bb03d10c49]::ExplicitBug>
11: 0x73e4900424a1 - <rustc_errors[c81a47bb03d10c49]::diagnostic::BugAbort as rustc_errors[c81a47bb03d10c49]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
12: 0x73e490583ffc - <rustc_errors[c81a47bb03d10c49]::DiagCtxtHandle>::span_bug::<rustc_span[ea7dcc2b1ee22db4]::span_encoding::Span, alloc[6a08b52f7c63c4c5]::string::String>
13: 0x73e4906191a7 - rustc_middle[e9f59b4e4013ff92]::util::bug::opt_span_bug_fmt::<rustc_span[ea7dcc2b1ee22db4]::span_encoding::Span>::{closure#0}
14: 0x73e4905f8c8a - rustc_middle[e9f59b4e4013ff92]::ty::context::tls::with_opt::<rustc_middle[e9f59b4e4013ff92]::util::bug::opt_span_bug_fmt<rustc_span[ea7dcc2b1ee22db4]::span_encoding::Span>::{closure#0}, !>::{closure#0}
15: 0x73e4905f8afb - rustc_middle[e9f59b4e4013ff92]::ty::context::tls::with_context_opt::<rustc_middle[e9f59b4e4013ff92]::ty::context::tls::with_opt<rustc_middle[e9f59b4e4013ff92]::util::bug::opt_span_bug_fmt<rustc_span[ea7dcc2b1ee22db4]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
16: 0x73e48e655e37 - rustc_middle[e9f59b4e4013ff92]::util::bug::span_bug_fmt::<rustc_span[ea7dcc2b1ee22db4]::span_encoding::Span>
17: 0x73e48ec8e3c0 - rustc_hir_analysis[ab9651012c5db622]::collect::generics_of::generics_of
18: 0x73e4916477e9 - rustc_query_impl[d85220fa7fd32bf]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d85220fa7fd32bf]::query_impl::generics_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 8usize]>>
19: 0x73e491647ee5 - rustc_query_system[468cded001f439c3]::query::plumbing::try_execute_query::<rustc_query_impl[d85220fa7fd32bf]::DynamicConfig<rustc_query_system[468cded001f439c3]::query::caches::DefIdCache<rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[d85220fa7fd32bf]::plumbing::QueryCtxt, false>
20: 0x73e491647c1d - rustc_query_impl[d85220fa7fd32bf]::query_impl::generics_of::get_query_non_incr::__rust_end_short_backtrace
21: 0x73e48ec8f3e6 - rustc_hir_analysis[ab9651012c5db622]::collect::generics_of::generics_of
22: 0x73e4916477e9 - rustc_query_impl[d85220fa7fd32bf]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d85220fa7fd32bf]::query_impl::generics_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 8usize]>>
23: 0x73e491647ee5 - rustc_query_system[468cded001f439c3]::query::plumbing::try_execute_query::<rustc_query_impl[d85220fa7fd32bf]::DynamicConfig<rustc_query_system[468cded001f439c3]::query::caches::DefIdCache<rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[d85220fa7fd32bf]::plumbing::QueryCtxt, false>
24: 0x73e491647c1d - rustc_query_impl[d85220fa7fd32bf]::query_impl::generics_of::get_query_non_incr::__rust_end_short_backtrace
25: 0x73e491fcfb96 - <rustc_middle[e9f59b4e4013ff92]::ty::list::RawList<(), rustc_middle[e9f59b4e4013ff92]::ty::generic_args::GenericArg>>::for_item::<<rustc_middle[e9f59b4e4013ff92]::ty::list::RawList<(), rustc_middle[e9f59b4e4013ff92]::ty::generic_args::GenericArg>>::identity_for_item<rustc_span[ea7dcc2b1ee22db4]::def_id::DefId>::{closure#0}>
26: 0x73e491f168a0 - <dyn rustc_hir_analysis[ab9651012c5db622]::hir_ty_lowering::HirTyLowerer>::lower_const_arg
27: 0x73e48ecb9f2d - <<dyn rustc_hir_analysis[ab9651012c5db622]::hir_ty_lowering::HirTyLowerer>::lower_generic_args_of_path::{closure#0}::GenericArgsCtxt as rustc_hir_analysis[ab9651012c5db622]::hir_ty_lowering::GenericArgsLowerer>::provided_kind
28: 0x73e4901d5d93 - <dyn rustc_hir_analysis[ab9651012c5db622]::hir_ty_lowering::HirTyLowerer>::lower_generic_args_of_path_segment
29: 0x73e491f17258 - <dyn rustc_hir_analysis[ab9651012c5db622]::hir_ty_lowering::HirTyLowerer>::lower_const_arg
30: 0x73e492d41054 - <<rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::instantiate_value_path::CtorGenericArgsCtxt as rustc_hir_analysis[ab9651012c5db622]::hir_ty_lowering::GenericArgsLowerer>::provided_kind.warm
31: 0x73e4923e540c - <rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::instantiate_value_path
32: 0x73e4923db5e7 - <rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::check_expr_path
33: 0x73e4925b7726 - <rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
34: 0x73e491907cb9 - <rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::check_expr_call
35: 0x73e4925b8760 - <rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
36: 0x73e4918bbc8c - <rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::check_expr_block
37: 0x73e4925b8cb6 - <rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
38: 0x73e4927ec852 - rustc_hir_typeck[3d8fe027d12f60fb]::typeck_with_inspect::{closure#0}
39: 0x73e4927eadb0 - rustc_query_impl[d85220fa7fd32bf]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d85220fa7fd32bf]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 8usize]>>
40: 0x73e4917a3eee - rustc_query_system[468cded001f439c3]::query::plumbing::try_execute_query::<rustc_query_impl[d85220fa7fd32bf]::DynamicConfig<rustc_data_structures[ff3a6d2cb9f2c0ad]::vec_cache::VecCache<rustc_span[ea7dcc2b1ee22db4]::def_id::LocalDefId, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[468cded001f439c3]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[d85220fa7fd32bf]::plumbing::QueryCtxt, false>
41: 0x73e4917a3889 - rustc_query_impl[d85220fa7fd32bf]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
42: 0x73e4920f60f7 - rustc_mir_build[902195af07c6ddbc]::thir::cx::thir_body
43: 0x73e4920f4e1c - rustc_query_impl[d85220fa7fd32bf]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d85220fa7fd32bf]::query_impl::thir_body::dynamic_query::{closure#2}::{closure#0}, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 16usize]>>
44: 0x73e491fc2cab - rustc_query_system[468cded001f439c3]::query::plumbing::try_execute_query::<rustc_query_impl[d85220fa7fd32bf]::DynamicConfig<rustc_data_structures[ff3a6d2cb9f2c0ad]::vec_cache::VecCache<rustc_span[ea7dcc2b1ee22db4]::def_id::LocalDefId, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 16usize]>, rustc_query_system[468cded001f439c3]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[d85220fa7fd32bf]::plumbing::QueryCtxt, false>
45: 0x73e491fc290c - rustc_query_impl[d85220fa7fd32bf]::query_impl::thir_body::get_query_non_incr::__rust_end_short_backtrace
46: 0x73e49197e187 - rustc_query_impl[d85220fa7fd32bf]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d85220fa7fd32bf]::query_impl::thir_abstract_const::dynamic_query::{closure#2}::{closure#0}, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 16usize]>>
47: 0x73e49197e0cd - <rustc_query_impl[d85220fa7fd32bf]::query_impl::thir_abstract_const::dynamic_query::{closure#2} as core[3787519d2ef8946e]::ops::function::FnOnce<(rustc_middle[e9f59b4e4013ff92]::ty::context::TyCtxt, rustc_span[ea7dcc2b1ee22db4]::def_id::DefId)>>::call_once
48: 0x73e4917bbb7b - rustc_query_system[468cded001f439c3]::query::plumbing::try_execute_query::<rustc_query_impl[d85220fa7fd32bf]::DynamicConfig<rustc_query_system[468cded001f439c3]::query::caches::DefIdCache<rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[d85220fa7fd32bf]::plumbing::QueryCtxt, false>
49: 0x73e4917bb7b2 - rustc_query_impl[d85220fa7fd32bf]::query_impl::thir_abstract_const::get_query_non_incr::__rust_end_short_backtrace
50: 0x73e492d64691 - <<rustc_middle[e9f59b4e4013ff92]::ty::context::TyCtxt>::expand_abstract_consts::Expander as rustc_type_ir[f7ec40aa9cc7f67f]::fold::TypeFolder<rustc_middle[e9f59b4e4013ff92]::ty::context::TyCtxt>>::fold_const.warm
51: 0x73e491b02331 - rustc_trait_selection[2b6744d267096662]::traits::const_evaluatable::is_const_evaluatable
52: 0x73e492122579 - <rustc_trait_selection[2b6744d267096662]::traits::fulfill::FulfillProcessor as rustc_data_structures[ff3a6d2cb9f2c0ad]::obligation_forest::ObligationProcessor>::process_obligation
53: 0x73e4916058c2 - <rustc_data_structures[ff3a6d2cb9f2c0ad]::obligation_forest::ObligationForest<rustc_trait_selection[2b6744d267096662]::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection[2b6744d267096662]::traits::fulfill::FulfillProcessor>
54: 0x73e49190ab21 - <rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::check_expr_call
55: 0x73e4925b8760 - <rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
56: 0x73e4918bbc8c - <rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::check_expr_block
57: 0x73e4925b8cb6 - <rustc_hir_typeck[3d8fe027d12f60fb]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
58: 0x73e4927ec852 - rustc_hir_typeck[3d8fe027d12f60fb]::typeck_with_inspect::{closure#0}
59: 0x73e4927eadb0 - rustc_query_impl[d85220fa7fd32bf]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d85220fa7fd32bf]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 8usize]>>
60: 0x73e4917a3eee - rustc_query_system[468cded001f439c3]::query::plumbing::try_execute_query::<rustc_query_impl[d85220fa7fd32bf]::DynamicConfig<rustc_data_structures[ff3a6d2cb9f2c0ad]::vec_cache::VecCache<rustc_span[ea7dcc2b1ee22db4]::def_id::LocalDefId, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[468cded001f439c3]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[d85220fa7fd32bf]::plumbing::QueryCtxt, false>
61: 0x73e4917a3889 - rustc_query_impl[d85220fa7fd32bf]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
62: 0x73e4917a4d39 - rustc_query_impl[d85220fa7fd32bf]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d85220fa7fd32bf]::query_impl::used_trait_imports::dynamic_query::{closure#2}::{closure#0}, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 8usize]>>
63: 0x73e4917a3eee - rustc_query_system[468cded001f439c3]::query::plumbing::try_execute_query::<rustc_query_impl[d85220fa7fd32bf]::DynamicConfig<rustc_data_structures[ff3a6d2cb9f2c0ad]::vec_cache::VecCache<rustc_span[ea7dcc2b1ee22db4]::def_id::LocalDefId, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[468cded001f439c3]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[d85220fa7fd32bf]::plumbing::QueryCtxt, false>
64: 0x73e4917a37c9 - rustc_query_impl[d85220fa7fd32bf]::query_impl::used_trait_imports::get_query_non_incr::__rust_end_short_backtrace
65: 0x73e4917a3341 - rustc_hir_analysis[ab9651012c5db622]::check_unused::check_unused_traits
66: 0x73e4917a31f1 - rustc_query_impl[d85220fa7fd32bf]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d85220fa7fd32bf]::query_impl::check_unused_traits::dynamic_query::{closure#2}::{closure#0}, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 0usize]>>
67: 0x73e4926a0930 - rustc_query_system[468cded001f439c3]::query::plumbing::try_execute_query::<rustc_query_impl[d85220fa7fd32bf]::DynamicConfig<rustc_query_system[468cded001f439c3]::query::caches::SingleCache<rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[d85220fa7fd32bf]::plumbing::QueryCtxt, false>
68: 0x73e4926a068e - rustc_query_impl[d85220fa7fd32bf]::query_impl::check_unused_traits::get_query_non_incr::__rust_end_short_backtrace
69: 0x73e491de2b67 - rustc_hir_analysis[ab9651012c5db622]::check_crate
70: 0x73e4920d7063 - rustc_interface[14a849aff36076f8]::passes::analysis
71: 0x73e4920d6c6b - rustc_query_impl[d85220fa7fd32bf]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d85220fa7fd32bf]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 0usize]>>
72: 0x73e4926a0930 - rustc_query_system[468cded001f439c3]::query::plumbing::try_execute_query::<rustc_query_impl[d85220fa7fd32bf]::DynamicConfig<rustc_query_system[468cded001f439c3]::query::caches::SingleCache<rustc_middle[e9f59b4e4013ff92]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[d85220fa7fd32bf]::plumbing::QueryCtxt, false>
73: 0x73e4926a04fc - rustc_query_impl[d85220fa7fd32bf]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
74: 0x73e4928a4ed6 - rustc_interface[14a849aff36076f8]::passes::create_and_enter_global_ctxt::<core[3787519d2ef8946e]::option::Option<rustc_interface[14a849aff36076f8]::queries::Linker>, rustc_driver_impl[705e5eaf62d438bb]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
75: 0x73e492877d83 - rustc_interface[14a849aff36076f8]::interface::run_compiler::<(), rustc_driver_impl[705e5eaf62d438bb]::run_compiler::{closure#0}>::{closure#1}
76: 0x73e49281bb38 - std[3c46b9eb67f00f78]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[14a849aff36076f8]::util::run_in_thread_with_globals<rustc_interface[14a849aff36076f8]::util::run_in_thread_pool_with_globals<rustc_interface[14a849aff36076f8]::interface::run_compiler<(), rustc_driver_impl[705e5eaf62d438bb]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
77: 0x73e49281b816 - <<std[3c46b9eb67f00f78]::thread::Builder>::spawn_unchecked_<rustc_interface[14a849aff36076f8]::util::run_in_thread_with_globals<rustc_interface[14a849aff36076f8]::util::run_in_thread_pool_with_globals<rustc_interface[14a849aff36076f8]::interface::run_compiler<(), rustc_driver_impl[705e5eaf62d438bb]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[3787519d2ef8946e]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
78: 0x73e492819e3d - std::sys::pal::unix::thread::Thread::new::thread_start::h1b394520373fba89
79: 0x73e48c29b7eb - <unknown>
80: 0x73e48c31f18c - <unknown>
81: 0x0 - <unknown>
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 1.90.0-nightly (6268d0aa3 2025-07-03) running on x86_64-unknown-linux-gnu
note: compiler flags: -Z crate-attr=feature(generic_const_exprs) -Z crate-attr=feature(min_generic_const_args) -Z dump-mir-dir=dir
query stack during panic:
#0 [generics_of] computing generics of `identity::{constant#0}::{constant#0}::{constant#0}`
#1 [generics_of] computing generics of `identity::{constant#0}::{constant#0}::{constant#0}::{constant#0}`
#2 [typeck] type-checking `identity::{constant#0}::{constant#0}`
#3 [thir_body] building THIR for `identity::{constant#0}::{constant#0}`
#4 [thir_abstract_const] building an abstract representation for `identity::{constant#0}::{constant#0}`
#5 [typeck] type-checking `identity::{constant#0}`
#6 [used_trait_imports] finding used_trait_imports `identity::{constant#0}`
#7 [check_unused_traits] checking unused trait imports in crate
#8 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 10 previous errors; 2 warnings emitted
Some errors have detailed explanations: E0308, E0423, E0573, E0585, E0601.
For more information about an error, try `rustc --explain E0308`.
@rustbot label +F-generic_const_exprs +F-min_generic_const_args
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Category: This is a bug.`#![feature(generic_const_exprs)]``#![feature(min_generic_const_args)]`Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Relevant to the compiler team, which will review and decide on the PR/issue.This issue may need triage. Remove it if it has been sufficiently triaged.