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Description
auto-reduced (treereduce-rust):
struct Data {
#[align(8)]
x: usize8,
}original:
struct Data {
#[align(8)] x : usize8
}Version information
rustc 1.90.0-nightly (3014e79f9 2025-07-15)
binary: rustc
commit-hash: 3014e79f9c8d5510ea7b3a3b70d171d0948b1e96
commit-date: 2025-07-15
host: x86_64-unknown-linux-gnu
release: 1.90.0-nightly
LLVM version: 20.1.8
Possibly related line of code:
rust/compiler/rustc_errors/src/emitter.rs
Lines 3111 to 3123 in 3014e79
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc
Program output
error[E0412]: cannot find type `usize8` in this scope
--> /tmp/icemaker_global_tempdir.tCI4asTIohWB/rustc_testrunner_tmpdir_reporting.mL7X4EToUuml/mvce.rs:3:8
|
3 | x: usize8,
| ^^^^^^ help: a builtin type with a similar name exists: `usize`
error[E0658]: the `#[align]` attribute is an experimental feature
--> /tmp/icemaker_global_tempdir.tCI4asTIohWB/rustc_testrunner_tmpdir_reporting.mL7X4EToUuml/mvce.rs:2:5
|
2 | #[align(8)]
| ^^^^^^^^^^^
|
= note: see issue #82232 <https://github.com/rust-lang/rust/issues/82232> for more information
= help: add `#![feature(fn_align)]` to the crate attributes to enable
= note: this compiler was built on 2025-07-15; consider upgrading it if it is out of date
error[E0601]: `main` function not found in crate `mvce`
--> /tmp/icemaker_global_tempdir.tCI4asTIohWB/rustc_testrunner_tmpdir_reporting.mL7X4EToUuml/mvce.rs:4:2
|
4 | }
| ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.tCI4asTIohWB/rustc_testrunner_tmpdir_reporting.mL7X4EToUuml/mvce.rs`
thread 'rustc' panicked at compiler/rustc_errors/src/emitter.rs:3117:30:
called `Result::unwrap()` on an `Err` value: failed while formatting fluent string `passes_align_on_fields`:
the attribute `label` was missing
help: add `.label = <message>`
stack backtrace:
0: 0x788056df4b63 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h4af010e4b1354d4d
1: 0x7880576029b7 - core::fmt::write::h17347e42c9203d6d
2: 0x788056dea6f3 - std::io::Write::write_fmt::h05610498df74ae59
3: 0x788056df49c2 - std::sys::backtrace::BacktraceLock::print::h0286e2cc1356b990
4: 0x788056df8467 - std::panicking::default_hook::{{closure}}::hb566dc96699e42f6
5: 0x788056df7fcb - std::panicking::default_hook::h1b340523e54d7d17
6: 0x788055e8e6d3 - std[8431a5d67c83f301]::panicking::update_hook::<alloc[fc29ea6f01862dd9]::boxed::Box<rustc_driver_impl[fdd49284100304e4]::install_ice_hook::{closure#1}>>::{closure#0}
7: 0x788056df8cae - std::panicking::rust_panic_with_hook::hceef4321c6f4ad8a
8: 0x788056df89aa - std::panicking::begin_panic_handler::{{closure}}::hf9fd67a226c3bb3d
9: 0x788056df5029 - std::sys::backtrace::__rust_end_short_backtrace::h52410ec1fdc70787
10: 0x788056df868d - __rustc[507298ddafb0ef2f]::rust_begin_unwind
11: 0x7880534f2930 - core::panicking::panic_fmt::hf04b323265684a46
12: 0x7880535709c6 - core::result::unwrap_failed::hdf92484becbba54e
13: 0x788058c0d166 - <rustc_errors[61709cc4d5caccb3]::emitter::FileWithAnnotatedLines>::collect_annotations
14: 0x788058c101b0 - <rustc_errors[61709cc4d5caccb3]::emitter::HumanEmitter>::emit_messages_default_inner::{closure#0}
15: 0x788058acca08 - <rustc_errors[61709cc4d5caccb3]::emitter::HumanEmitter as rustc_errors[61709cc4d5caccb3]::emitter::Emitter>::emit_diagnostic
16: 0x788058ad46b7 - <rustc_errors[61709cc4d5caccb3]::DiagCtxtInner>::emit_diagnostic::{closure#3}
17: 0x788058ad232e - rustc_interface[5c27d80bbf0205a9]::callbacks::track_diagnostic::<core[caebfb8306899321]::option::Option<rustc_span[f5894adb1c415d66]::ErrorGuaranteed>>
18: 0x788058ad12fd - <rustc_errors[61709cc4d5caccb3]::DiagCtxtInner>::emit_diagnostic
19: 0x788058ad11bf - <rustc_errors[61709cc4d5caccb3]::DiagCtxtHandle>::emit_diagnostic
20: 0x788058ad1055 - <() as rustc_errors[61709cc4d5caccb3]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
21: 0x788057c80807 - rustc_middle[db85b62c91a80af6]::lint::lint_level::lint_level_impl
22: 0x788057fdbde4 - <rustc_passes[24702fb08786ebe6]::check_attr::CheckAttrVisitor>::check_attributes
23: 0x788057fd6310 - <rustc_passes[24702fb08786ebe6]::check_attr::CheckAttrVisitor as rustc_hir[536fe9fb45918b80]::intravisit::Visitor>::visit_item
24: 0x788053eb72e8 - rustc_passes[24702fb08786ebe6]::check_attr::check_mod_attrs
25: 0x78805848b3d9 - rustc_query_impl[da0a5435bd9c03d4]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[da0a5435bd9c03d4]::query_impl::check_mod_attrs::dynamic_query::{closure#2}::{closure#0}, rustc_middle[db85b62c91a80af6]::query::erase::Erased<[u8; 0usize]>>
26: 0x78805848aeda - rustc_query_system[3aa0ab085113fb24]::query::plumbing::try_execute_query::<rustc_query_impl[da0a5435bd9c03d4]::DynamicConfig<rustc_query_system[3aa0ab085113fb24]::query::caches::DefaultCache<rustc_span[f5894adb1c415d66]::def_id::LocalModDefId, rustc_middle[db85b62c91a80af6]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[da0a5435bd9c03d4]::plumbing::QueryCtxt, false>
27: 0x78805848ac8d - rustc_query_impl[da0a5435bd9c03d4]::query_impl::check_mod_attrs::get_query_non_incr::__rust_end_short_backtrace
28: 0x78805848aa5b - <rustc_middle[db85b62c91a80af6]::ty::context::TyCtxt>::par_hir_for_each_module::<rustc_interface[5c27d80bbf0205a9]::passes::run_required_analyses::{closure#0}::{closure#0}::{closure#1}::{closure#0}>::{closure#0}
29: 0x788057ffcecc - rustc_interface[5c27d80bbf0205a9]::passes::analysis
30: 0x788057ffcbef - rustc_query_impl[da0a5435bd9c03d4]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[da0a5435bd9c03d4]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[db85b62c91a80af6]::query::erase::Erased<[u8; 0usize]>>
31: 0x7880586acdbc - rustc_query_system[3aa0ab085113fb24]::query::plumbing::try_execute_query::<rustc_query_impl[da0a5435bd9c03d4]::DynamicConfig<rustc_query_system[3aa0ab085113fb24]::query::caches::SingleCache<rustc_middle[db85b62c91a80af6]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[da0a5435bd9c03d4]::plumbing::QueryCtxt, false>
32: 0x7880586ac984 - rustc_query_impl[da0a5435bd9c03d4]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
33: 0x78805890860b - rustc_interface[5c27d80bbf0205a9]::passes::create_and_enter_global_ctxt::<core[caebfb8306899321]::option::Option<rustc_interface[5c27d80bbf0205a9]::queries::Linker>, rustc_driver_impl[fdd49284100304e4]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
34: 0x7880588f64d4 - rustc_interface[5c27d80bbf0205a9]::interface::run_compiler::<(), rustc_driver_impl[fdd49284100304e4]::run_compiler::{closure#0}>::{closure#1}
35: 0x7880587c1538 - std[8431a5d67c83f301]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[5c27d80bbf0205a9]::util::run_in_thread_with_globals<rustc_interface[5c27d80bbf0205a9]::util::run_in_thread_pool_with_globals<rustc_interface[5c27d80bbf0205a9]::interface::run_compiler<(), rustc_driver_impl[fdd49284100304e4]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
36: 0x7880587c1216 - <<std[8431a5d67c83f301]::thread::Builder>::spawn_unchecked_<rustc_interface[5c27d80bbf0205a9]::util::run_in_thread_with_globals<rustc_interface[5c27d80bbf0205a9]::util::run_in_thread_pool_with_globals<rustc_interface[5c27d80bbf0205a9]::interface::run_compiler<(), rustc_driver_impl[fdd49284100304e4]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[caebfb8306899321]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
37: 0x7880587c733d - std::sys::pal::unix::thread::Thread::new::thread_start::hae446d0e444b0387
38: 0x7880520a57eb - <unknown>
39: 0x78805212918c - <unknown>
40: 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 1.90.0-nightly (3014e79f9 2025-07-15) running on x86_64-unknown-linux-gnu
query stack during panic:
#0 [check_mod_attrs] checking attributes in top-level module
#1 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 3 previous errors; 1 warning emitted
Some errors have detailed explanations: E0412, E0601, E0658.
For more information about an error, try `rustc --explain E0412`.