ICE: compiler/rustc_passes/src/check_attr.rs None

[matthiaskrgr]

auto-reduced (treereduce-rust):

#[unsafe(macro_use::VAR2)]

fn dead_code() {}

original:

#[unsafe(macro_use::VAR2( //~ ERROR: is not an unsafe attribute
    cc = "testing",
))]
trait Foo {}

fn dead_code() {
    let _a = cfg!(unsafe(foo));
    //~^ ERROR: expected identifier, found keyword `unsafe`
    //~^^ ERROR: invalid predicate `r#unsafe`
}

Version information

rustc 1.88.0-nightly (7f695232a 2025-04-24)
binary: rustc
commit-hash: 7f695232a80fa1833e2282f2577c5e1ff066bf39
commit-date: 2025-04-24
host: x86_64-unknown-linux-gnu
release: 1.88.0-nightly
LLVM version: 20.1.2

Possibly related line of code:

rust/compiler/rustc_passes/src/check_attr.rs

Lines 2298 to 2310 in 7f69523

	}
	_ => {}
	}
	}
	fn check_macro_use(&self, hir_id: HirId, attr: &Attribute, target: Target) {
	let name = attr.name().unwrap();
	match target {
	Target::ExternCrate | Target::Mod => {}
	_ => {
	self.tcx.emit_node_span_lint(
	UNUSED_ATTRIBUTES,
	hir_id,

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc

Program output

error: `macro_use::VAR2` is not an unsafe attribute
 --> /tmp/icemaker_global_tempdir.Jaq1ngkHMAmh/rustc_testrunner_tmpdir_reporting.AmsF5wxLrYZy/mvce.rs:1:3
  |
1 | #[unsafe(macro_use::VAR2)]
  |   ^^^^^^ this is not an unsafe attribute
  |
  = note: extraneous unsafe is not allowed in attributes

error[E0433]: failed to resolve: use of unresolved module or unlinked crate `macro_use`
 --> /tmp/icemaker_global_tempdir.Jaq1ngkHMAmh/rustc_testrunner_tmpdir_reporting.AmsF5wxLrYZy/mvce.rs:1:10
  |
1 | #[unsafe(macro_use::VAR2)]
  |          ^^^^^^^^^ use of unresolved module or unlinked crate `macro_use`

error[E0601]: `main` function not found in crate `mvce`
 --> /tmp/icemaker_global_tempdir.Jaq1ngkHMAmh/rustc_testrunner_tmpdir_reporting.AmsF5wxLrYZy/mvce.rs:3:18
  |
3 | fn dead_code() {}
  |                  ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.Jaq1ngkHMAmh/rustc_testrunner_tmpdir_reporting.AmsF5wxLrYZy/mvce.rs`


thread 'rustc' panicked at compiler/rustc_passes/src/check_attr.rs:2304:32:
called `Option::unwrap()` on a `None` value
stack backtrace:
   0:     0x78283dcf1af3 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h6074b4823f65de86
   1:     0x78283e405ac7 - core::fmt::write::h53ca745e7669d6ca
   2:     0x78283f83c151 - std::io::Write::write_fmt::h1d067d18f05b6aaf
   3:     0x78283dcf1952 - std::sys::backtrace::BacktraceLock::print::he4f12001bc479577
   4:     0x78283dcf52ca - std::panicking::default_hook::{{closure}}::h22f056db3b35ba5b
   5:     0x78283dcf4e4f - std::panicking::default_hook::h97f2514df82f96dc
   6:     0x78283cd651f3 - std[31fa69963de3e716]::panicking::update_hook::<alloc[e973a43720220a68]::boxed::Box<rustc_driver_impl[9b6440e8c5aa4392]::install_ice_hook::{closure#1}>>::{closure#0}
   7:     0x78283dcf5b43 - std::panicking::rust_panic_with_hook::h97fae1d3606b557b
   8:     0x78283dcf5806 - std::panicking::begin_panic_handler::{{closure}}::h4e90c3f0910a708d
   9:     0x78283dcf1fc9 - std::sys::backtrace::__rust_end_short_backtrace::h4c9de78e98ddb0d4
  10:     0x78283dcf54fd - __rustc[de6a073325aecdca]::rust_begin_unwind
  11:     0x78283a68c0d0 - core::panicking::panic_fmt::h82117a00ed7f06bd
  12:     0x78283a69128c - core::panicking::panic::h7c1e3ca4629f43e2
  13:     0x78283a68cba9 - core::option::unwrap_failed::hee23a2b06abad8ea
  14:     0x78283ea6e865 - <rustc_passes[8f2e8035e948caae]::check_attr::CheckAttrVisitor>::check_attributes
  15:     0x78283ea6a29d - <rustc_passes[8f2e8035e948caae]::check_attr::CheckAttrVisitor as rustc_hir[62920335b276a22c]::intravisit::Visitor>::visit_item
  16:     0x78283ea69889 - rustc_passes[8f2e8035e948caae]::check_attr::check_mod_attrs
  17:     0x78283ea69727 - rustc_query_impl[57231a76910cd723]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[57231a76910cd723]::query_impl::check_mod_attrs::dynamic_query::{closure#2}::{closure#0}, rustc_middle[36f8a18d65cfb9c0]::query::erase::Erased<[u8; 0usize]>>
  18:     0x78283f2e291e - rustc_query_system[5da669c39f9bedc5]::query::plumbing::try_execute_query::<rustc_query_impl[57231a76910cd723]::DynamicConfig<rustc_query_system[5da669c39f9bedc5]::query::caches::DefaultCache<rustc_span[c874c8932baed791]::def_id::LocalModDefId, rustc_middle[36f8a18d65cfb9c0]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[57231a76910cd723]::plumbing::QueryCtxt, false>
  19:     0x78283f2e263e - rustc_query_impl[57231a76910cd723]::query_impl::check_mod_attrs::get_query_non_incr::__rust_end_short_backtrace
  20:     0x78283f2e2236 - <rustc_middle[36f8a18d65cfb9c0]::ty::context::TyCtxt>::par_hir_for_each_module::<rustc_interface[290ddbb4ad9de59d]::passes::run_required_analyses::{closure#0}::{closure#0}::{closure#1}::{closure#0}>::{closure#0}
  21:     0x78283ee2db2d - rustc_interface[290ddbb4ad9de59d]::passes::run_required_analyses
  22:     0x78283f2df25e - rustc_interface[290ddbb4ad9de59d]::passes::analysis
  23:     0x78283f2df22d - rustc_query_impl[57231a76910cd723]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[57231a76910cd723]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[36f8a18d65cfb9c0]::query::erase::Erased<[u8; 0usize]>>
  24:     0x78283f2e4cfd - rustc_query_system[5da669c39f9bedc5]::query::plumbing::try_execute_query::<rustc_query_impl[57231a76910cd723]::DynamicConfig<rustc_query_system[5da669c39f9bedc5]::query::caches::SingleCache<rustc_middle[36f8a18d65cfb9c0]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[57231a76910cd723]::plumbing::QueryCtxt, false>
  25:     0x78283f2e49f8 - rustc_query_impl[57231a76910cd723]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  26:     0x78283f6448c0 - rustc_interface[290ddbb4ad9de59d]::passes::create_and_enter_global_ctxt::<core[2cb9221611fcb058]::option::Option<rustc_interface[290ddbb4ad9de59d]::queries::Linker>, rustc_driver_impl[9b6440e8c5aa4392]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
  27:     0x78283f4f4c44 - rustc_interface[290ddbb4ad9de59d]::interface::run_compiler::<(), rustc_driver_impl[9b6440e8c5aa4392]::run_compiler::{closure#0}>::{closure#1}
  28:     0x78283f32b5e8 - std[31fa69963de3e716]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[290ddbb4ad9de59d]::util::run_in_thread_with_globals<rustc_interface[290ddbb4ad9de59d]::util::run_in_thread_pool_with_globals<rustc_interface[290ddbb4ad9de59d]::interface::run_compiler<(), rustc_driver_impl[9b6440e8c5aa4392]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  29:     0x78283f32ba34 - <<std[31fa69963de3e716]::thread::Builder>::spawn_unchecked_<rustc_interface[290ddbb4ad9de59d]::util::run_in_thread_with_globals<rustc_interface[290ddbb4ad9de59d]::util::run_in_thread_pool_with_globals<rustc_interface[290ddbb4ad9de59d]::interface::run_compiler<(), rustc_driver_impl[9b6440e8c5aa4392]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[2cb9221611fcb058]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  30:     0x78283f32ce37 - std::sys::pal::unix::thread::Thread::new::thread_start::h54e66dc68950361a
  31:     0x7828392a370a - <unknown>
  32:     0x782839327aac - <unknown>
  33:                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 1.88.0-nightly (7f695232a 2025-04-24) 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

Some errors have detailed explanations: E0433, E0601.
For more information about an error, try `rustc --explain E0433`.

[jieyouxu]

Without bisecting, maybe #139615

[moxian]

• It does bisect to Rollup of 7 pull requests #139996, so yes Remove name_or_empty #139615 very likely

@rustbot label: +S-has-bisection +S-has-mcve