Open
Description
auto-reduced (treereduce-rust):
#![feature(min_generic_const_args)]
trait Bar {
fn x(&self) -> [i32; Bar::x];
}original:
trait Bar {
const X: usize;
fn x(&self) -> [i32; Bar::x]; //~ ERROR: E0790
}
impl Foo for Baz {
type Bar = i16;
type Bar = u16; //~ ERROR duplicate definitions
} // This test is a regression test for #34792
fn main() {}Version information
rustc 1.87.0-nightly (30f168ef8 2025-03-05)
binary: rustc
commit-hash: 30f168ef811aec63124eac677e14699baa9395bd
commit-date: 2025-03-05
host: x86_64-unknown-linux-gnu
release: 1.87.0-nightly
LLVM version: 20.1.0
Possibly related line of code:
rust/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs
Lines 474 to 486 in 30f168e
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc -Zcrate-attr=feature(min_generic_const_args)
Program output
warning: the feature `min_generic_const_args` is incomplete and may not be safe to use and/or cause compiler crashes
--> <crate attribute>:1:9
|
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.vSr1Cvpnzcg2/rustc_testrunner_tmpdir_reporting.nZRwsnvVQBn4/mvce.rs:3:2
|
3 | }
| ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.vSr1Cvpnzcg2/rustc_testrunner_tmpdir_reporting.nZRwsnvVQBn4/mvce.rs`
thread 'rustc' panicked at compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs:480:17:
assertion failed: !parent_args.is_empty()
stack backtrace:
0: 0x7850d13dde24 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hf41f50ce448220db
1: 0x7850d1c05aa2 - core::fmt::write::h2530ccbc5aed5a26
2: 0x7850d2ed5651 - std::io::Write::write_fmt::h681bc12d66bdbd5b
3: 0x7850d13ddc82 - std::sys::backtrace::BacktraceLock::print::h1d42fe6c4d6bf7a5
4: 0x7850d13e0562 - std::panicking::default_hook::{{closure}}::h100cc14e5415da6d
5: 0x7850d13e0154 - std::panicking::default_hook::hbbe023de1b3d14d2
6: 0x7850d0532fc7 - std[2ce054583824a2db]::panicking::update_hook::<alloc[52a0444d492a86c3]::boxed::Box<rustc_driver_impl[c3b441e0b8b3ec1e]::install_ice_hook::{closure#1}>>::{closure#0}
7: 0x7850d13e0dd3 - std::panicking::rust_panic_with_hook::hd76d2dd598e22f63
8: 0x7850d13e0a96 - std::panicking::begin_panic_handler::{{closure}}::h132f3f4e3b433649
9: 0x7850d13de2e9 - std::sys::backtrace::__rust_end_short_backtrace::h6fa5bf5a960629e7
10: 0x7850d13e078d - rust_begin_unwind
11: 0x7850ce05e920 - core::panicking::panic_fmt::h86998d6817cbe029
12: 0x7850ceb6c46c - core::panicking::panic::h94bcdeb8f28a7398
13: 0x7850d0707c87 - <dyn rustc_hir_analysis[dbcef965d73ee94d]::hir_ty_lowering::HirTyLowerer>::lower_generic_args_of_path_segment
14: 0x7850d2386439 - <dyn rustc_hir_analysis[dbcef965d73ee94d]::hir_ty_lowering::HirTyLowerer>::lower_const_arg
15: 0x7850d237723f - <dyn rustc_hir_analysis[dbcef965d73ee94d]::hir_ty_lowering::HirTyLowerer>::lower_ty
16: 0x7850d238e215 - <dyn rustc_hir_analysis[dbcef965d73ee94d]::hir_ty_lowering::HirTyLowerer>::lower_fn_ty
17: 0x7850d238a6bd - rustc_hir_analysis[dbcef965d73ee94d]::collect::fn_sig
18: 0x7850d1eee607 - rustc_query_impl[e00d6234639b5a1a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e00d6234639b5a1a]::query_impl::fn_sig::dynamic_query::{closure#2}::{closure#0}, rustc_middle[627fca435ebb918e]::query::erase::Erased<[u8; 24usize]>>
19: 0x7850d1eee5d5 - <rustc_query_impl[e00d6234639b5a1a]::query_impl::fn_sig::dynamic_query::{closure#2} as core[9e46b296f013918d]::ops::function::FnOnce<(rustc_middle[627fca435ebb918e]::ty::context::TyCtxt, rustc_span[eec47ca1352fb626]::def_id::DefId)>>::call_once
20: 0x7850d1ef10ba - rustc_query_system[db5555c7757ded81]::query::plumbing::try_execute_query::<rustc_query_impl[e00d6234639b5a1a]::DynamicConfig<rustc_query_system[db5555c7757ded81]::query::caches::DefIdCache<rustc_middle[627fca435ebb918e]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[e00d6234639b5a1a]::plumbing::QueryCtxt, false>
21: 0x7850d1ef07bd - rustc_query_impl[e00d6234639b5a1a]::query_impl::fn_sig::get_query_non_incr::__rust_end_short_backtrace
22: 0x7850d24a8625 - rustc_middle[627fca435ebb918e]::query::plumbing::query_get_at::<rustc_query_system[db5555c7757ded81]::query::caches::DefIdCache<rustc_middle[627fca435ebb918e]::query::erase::Erased<[u8; 24usize]>>>
23: 0x7850d23acf00 - rustc_hir_analysis[dbcef965d73ee94d]::check::check::check_item_type
24: 0x7850d2399925 - rustc_hir_analysis[dbcef965d73ee94d]::check::wfcheck::check_well_formed
25: 0x7850d2398011 - rustc_query_impl[e00d6234639b5a1a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e00d6234639b5a1a]::query_impl::check_well_formed::dynamic_query::{closure#2}::{closure#0}, rustc_middle[627fca435ebb918e]::query::erase::Erased<[u8; 1usize]>>
26: 0x7850d2397ac8 - rustc_query_system[db5555c7757ded81]::query::plumbing::try_execute_query::<rustc_query_impl[e00d6234639b5a1a]::DynamicConfig<rustc_data_structures[df3cf367e6d336df]::vec_cache::VecCache<rustc_span[eec47ca1352fb626]::def_id::LocalDefId, rustc_middle[627fca435ebb918e]::query::erase::Erased<[u8; 1usize]>, rustc_query_system[db5555c7757ded81]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[e00d6234639b5a1a]::plumbing::QueryCtxt, false>
27: 0x7850d2397583 - rustc_query_impl[e00d6234639b5a1a]::query_impl::check_well_formed::get_query_non_incr::__rust_end_short_backtrace
28: 0x7850d2394d9d - rustc_hir_analysis[dbcef965d73ee94d]::check::wfcheck::check_mod_type_wf
29: 0x7850d2394b9f - rustc_query_impl[e00d6234639b5a1a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e00d6234639b5a1a]::query_impl::check_mod_type_wf::dynamic_query::{closure#2}::{closure#0}, rustc_middle[627fca435ebb918e]::query::erase::Erased<[u8; 1usize]>>
30: 0x7850d2b99a56 - rustc_query_system[db5555c7757ded81]::query::plumbing::try_execute_query::<rustc_query_impl[e00d6234639b5a1a]::DynamicConfig<rustc_query_system[db5555c7757ded81]::query::caches::DefaultCache<rustc_span[eec47ca1352fb626]::def_id::LocalModDefId, rustc_middle[627fca435ebb918e]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[e00d6234639b5a1a]::plumbing::QueryCtxt, false>
31: 0x7850d2b997ff - rustc_query_impl[e00d6234639b5a1a]::query_impl::check_mod_type_wf::get_query_non_incr::__rust_end_short_backtrace
32: 0x7850d1fa728f - rustc_hir_analysis[dbcef965d73ee94d]::check_crate
33: 0x7850d208c2f2 - rustc_interface[f68678af3abb31c0]::passes::run_required_analyses
34: 0x7850d2c0bffa - rustc_interface[f68678af3abb31c0]::passes::analysis
35: 0x7850d2c0bfd9 - rustc_query_impl[e00d6234639b5a1a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e00d6234639b5a1a]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[627fca435ebb918e]::query::erase::Erased<[u8; 0usize]>>
36: 0x7850d2c5404b - rustc_query_system[db5555c7757ded81]::query::plumbing::try_execute_query::<rustc_query_impl[e00d6234639b5a1a]::DynamicConfig<rustc_query_system[db5555c7757ded81]::query::caches::SingleCache<rustc_middle[627fca435ebb918e]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[e00d6234639b5a1a]::plumbing::QueryCtxt, false>
37: 0x7850d2c53d39 - rustc_query_impl[e00d6234639b5a1a]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
38: 0x7850d2c83e7d - rustc_interface[f68678af3abb31c0]::passes::create_and_enter_global_ctxt::<core[9e46b296f013918d]::option::Option<rustc_interface[f68678af3abb31c0]::queries::Linker>, rustc_driver_impl[c3b441e0b8b3ec1e]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
39: 0x7850d2cbb5cf - rustc_interface[f68678af3abb31c0]::interface::run_compiler::<(), rustc_driver_impl[c3b441e0b8b3ec1e]::run_compiler::{closure#0}>::{closure#1}
40: 0x7850d2b5e648 - std[2ce054583824a2db]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[f68678af3abb31c0]::util::run_in_thread_with_globals<rustc_interface[f68678af3abb31c0]::util::run_in_thread_pool_with_globals<rustc_interface[f68678af3abb31c0]::interface::run_compiler<(), rustc_driver_impl[c3b441e0b8b3ec1e]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
41: 0x7850d2b5ef34 - <<std[2ce054583824a2db]::thread::Builder>::spawn_unchecked_<rustc_interface[f68678af3abb31c0]::util::run_in_thread_with_globals<rustc_interface[f68678af3abb31c0]::util::run_in_thread_pool_with_globals<rustc_interface[f68678af3abb31c0]::interface::run_compiler<(), rustc_driver_impl[c3b441e0b8b3ec1e]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[9e46b296f013918d]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
42: 0x7850d2b60337 - std::sys::pal::unix::thread::Thread::new::thread_start::hed3936679d260bcc
43: 0x7850ccca370a - <unknown>
44: 0x7850ccd27aac - <unknown>
45: 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 1.87.0-nightly (30f168ef8 2025-03-05) running on x86_64-unknown-linux-gnu
note: compiler flags: -Z crate-attr=feature(min_generic_const_args) -Z dump-mir-dir=dir
query stack during panic:
#0 [fn_sig] computing function signature of `Bar::x`
#1 [check_well_formed] checking that `Bar` is well-formed
#2 [check_mod_type_wf] checking that types are well-formed in top-level module
#3 [analysis] running analysis passes on this crate
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