error: expected identifier, found `,`
--> /tmp/icemaker_global_tempdir.v6JAMnE8yYt0/rustc_testrunner_tmpdir_reporting.RsHGpw3AHJUJ/mvce.rs:1:12
|
1 | #![feature(, min_generic_const_args, )]
| ^ expected identifier
|
help: remove this comma
|
1 - #![feature(, min_generic_const_args, )]
1 + #![feature( min_generic_const_args, )]
|
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.v6JAMnE8yYt0/rustc_testrunner_tmpdir_reporting.RsHGpw3AHJUJ/mvce.rs:1:14
|
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.v6JAMnE8yYt0/rustc_testrunner_tmpdir_reporting.RsHGpw3AHJUJ/mvce.rs:7:2
|
7 | }
| ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.v6JAMnE8yYt0/rustc_testrunner_tmpdir_reporting.RsHGpw3AHJUJ/mvce.rs`
error: the constant `1` is not of type `usize`
--> /tmp/icemaker_global_tempdir.v6JAMnE8yYt0/rustc_testrunner_tmpdir_reporting.RsHGpw3AHJUJ/mvce.rs:3:1
|
3 | type const CONST: usize = 1u32;
| ^^^^^^^^^^^^^^^^^^^^^^^ expected `usize`, found `u32`
thread 'rustc' (966057) panicked at /rustc-dev/5bbdeaa9a8dc563185f40e99f96704cbcc7a6e6e/compiler/rustc_const_eval/src/interpret/operand.rs:388:9:
attempting to project to field at offset 0 with size 8 into immediate with layout TyAndLayout {
ty: u32,
layout: Layout {
size: Size(4 bytes),
align: AbiAlign {
abi: Align(4 bytes),
},
backend_repr: Scalar(
Initialized {
value: Int(
I32,
false,
),
valid_range: 0..=4294967295,
},
),
fields: Primitive,
largest_niche: None,
uninhabited: false,
variants: Single {
index: 0,
},
max_repr_align: None,
unadjusted_abi_align: Align(4 bytes),
randomization_seed: 18446462607322841091,
},
}
stack backtrace:
0: 0x7f09ef1c8d7b - <<std[55fbeb01ec93ae41]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[6b09cf77c14f6d64]::fmt::Display>::fmt
1: 0x7f09ef81db88 - core[6b09cf77c14f6d64]::fmt::write
2: 0x7f09ef1dfd86 - <std[55fbeb01ec93ae41]::sys::stdio::unix::Stderr as std[55fbeb01ec93ae41]::io::Write>::write_fmt
3: 0x7f09ef19ed88 - std[55fbeb01ec93ae41]::panicking::default_hook::{closure#0}
4: 0x7f09ef1bc183 - std[55fbeb01ec93ae41]::panicking::default_hook
5: 0x7f09ee1c00bc - std[55fbeb01ec93ae41]::panicking::update_hook::<alloc[371bb832da918502]::boxed::Box<rustc_driver_impl[948c84815bc57e07]::install_ice_hook::{closure#1}>>::{closure#0}
6: 0x7f09ef1bc462 - std[55fbeb01ec93ae41]::panicking::panic_with_hook
7: 0x7f09ef19ee48 - std[55fbeb01ec93ae41]::panicking::panic_handler::{closure#0}
8: 0x7f09ef193399 - std[55fbeb01ec93ae41]::sys::backtrace::__rust_end_short_backtrace::<std[55fbeb01ec93ae41]::panicking::panic_handler::{closure#0}, !>
9: 0x7f09ef1a08ad - __rustc[f516f04310ac789b]::rust_begin_unwind
10: 0x7f09ebca6a8c - core[6b09cf77c14f6d64]::panicking::panic_fmt
11: 0x7f09f163d2ba - <rustc_const_eval[943d02374ec5aa24]::interpret::operand::ImmTy>::offset_::<rustc_const_eval[943d02374ec5aa24]::interpret::eval_context::InterpCx<rustc_const_eval[943d02374ec5aa24]::const_eval::dummy_machine::DummyMachine>>.cold
12: 0x7f09f0036d65 - <rustc_mir_transform[821c4539e524a24d]::known_panics_lint::ConstPropagator as rustc_middle[39fdeca766187dd]::mir::visit::Visitor>::visit_assign
13: 0x7f09f0030bc0 - <rustc_mir_transform[821c4539e524a24d]::known_panics_lint::ConstPropagator as rustc_middle[39fdeca766187dd]::mir::visit::Visitor>::visit_body
14: 0x7f09f002de8f - <rustc_mir_transform[821c4539e524a24d]::known_panics_lint::KnownPanicsLint as rustc_mir_transform[821c4539e524a24d]::pass_manager::MirLint>::run_lint
15: 0x7f09ef80d03c - rustc_mir_transform[821c4539e524a24d]::run_analysis_to_runtime_passes
16: 0x7f09f04c56b7 - rustc_mir_transform[821c4539e524a24d]::mir_drops_elaborated_and_const_checked
17: 0x7f09f04c5159 - rustc_query_impl[2232f359ced67f13]::query_impl::mir_drops_elaborated_and_const_checked::invoke_provider_fn::__rust_begin_short_backtrace
18: 0x7f09ef8b9f26 - rustc_query_impl[2232f359ced67f13]::execution::try_execute_query::<rustc_data_structures[4cf2110bba7d42f2]::vec_cache::VecCache<rustc_span[a1f4f8c3615135ef]::def_id::LocalDefId, rustc_middle[39fdeca766187dd]::query::erase::ErasedData<[u8; 8usize]>, rustc_middle[39fdeca766187dd]::dep_graph::graph::DepNodeIndex>, false>
19: 0x7f09ef8b7555 - rustc_query_impl[2232f359ced67f13]::query_impl::mir_drops_elaborated_and_const_checked::execute_query_non_incr::__rust_end_short_backtrace
20: 0x7f09ef8b7988 - <rustc_middle[39fdeca766187dd]::ty::context::TyCtxt>::par_hir_body_owners::<rustc_interface[2f488dcf8b7ae4e4]::passes::run_required_analyses::{closure#2}::{closure#0}>::{closure#0}
21: 0x7f09ef8b6ac2 - rustc_interface[2f488dcf8b7ae4e4]::passes::analysis
22: 0x7f09f0a2e849 - rustc_query_impl[2232f359ced67f13]::execution::try_execute_query::<rustc_middle[39fdeca766187dd]::query::caches::SingleCache<rustc_middle[39fdeca766187dd]::query::erase::ErasedData<[u8; 0usize]>>, false>
23: 0x7f09f0a2e529 - rustc_query_impl[2232f359ced67f13]::query_impl::analysis::execute_query_non_incr::__rust_end_short_backtrace
24: 0x7f09f0a01194 - rustc_interface[2f488dcf8b7ae4e4]::interface::run_compiler::<(), rustc_driver_impl[948c84815bc57e07]::run_compiler::{closure#0}>::{closure#1}
25: 0x7f09f09dbc3e - std[55fbeb01ec93ae41]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[2f488dcf8b7ae4e4]::util::run_in_thread_with_globals<rustc_interface[2f488dcf8b7ae4e4]::util::run_in_thread_pool_with_globals<rustc_interface[2f488dcf8b7ae4e4]::interface::run_compiler<(), rustc_driver_impl[948c84815bc57e07]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
26: 0x7f09f09dc4e0 - <std[55fbeb01ec93ae41]::thread::lifecycle::spawn_unchecked<rustc_interface[2f488dcf8b7ae4e4]::util::run_in_thread_with_globals<rustc_interface[2f488dcf8b7ae4e4]::util::run_in_thread_pool_with_globals<rustc_interface[2f488dcf8b7ae4e4]::interface::run_compiler<(), rustc_driver_impl[948c84815bc57e07]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[6b09cf77c14f6d64]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
27: 0x7f09f09dd36c - <std[55fbeb01ec93ae41]::sys::thread::unix::Thread>::new::thread_start
28: 0x7f09ea4a597a - <unknown>
29: 0x7f09ea5292bc - <unknown>
30: 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 1.96.0-nightly (5bbdeaa9a 2026-04-03) running on x86_64-unknown-linux-gnu
query stack during panic:
#0 [mir_drops_elaborated_and_const_checked] elaborating drops for `uses_const`
#1 [analysis] running analysis passes on crate `mvce`
end of query stack
error: aborting due to 3 previous errors; 1 warning emitted
For more information about this error, try `rustc --explain E0601`.
auto-reduced (treereduce-rust):
original:
Version information
Possibly related line of code:
rust/compiler/rustc_const_eval/src/interpret/operand.rs
Lines 382 to 394 in 5bbdeaa
Command:
/home/matthias/.rustup/toolchains/master/bin/rustcProgram output
@rustbot label +F-min_generic_const_args