Code
#[foobar]
extern crate core as std;
mod inner {
use crate::*;
use std::vec::IntoIter;
}
fn main() {}A mutant of tests/ui/resolve/ice-inconsistent-resolution-151213.rs
Meta
rustc --version --verbose:
rustc 1.95.0-nightly (7f99507f5 2026-02-19)
binary: rustc
commit-hash: 7f99507f57e6c4aa0dce3daf6a13cca8cd4dd312
commit-date: 2026-02-19
host: x86_64-apple-darwin
release: 1.95.0-nightly
LLVM version: 22.1.0
Error output
Command: rustc --edition=2024
(ICEs on edition 2018, 2021, and 2024. Not on 2015)
error: macro-expanded `extern crate` items cannot shadow names passed with `--extern`
--> iter7_2f11e5e32bb0210d.rs:2:1
|
2 | extern crate core as std;
| ^^^^^^^^^^^^^^^^^^^^^^^^^
thread 'rustc' (15640924) panicked at /rustc-dev/7f99507f57e6c4aa0dce3daf6a13cca8cd4dd312/compiler/rustc_resolve/src/imports.rs:1075:21:
assertion failed: import.imported_module.get().is_none()
Backtrace
thread 'rustc' (15640924) panicked at /rustc-dev/7f99507f57e6c4aa0dce3daf6a13cca8cd4dd312/compiler/rustc_resolve/src/imports.rs:1075:21:
assertion failed: import.imported_module.get().is_none()
stack backtrace:
0: __rustc::rust_begin_unwind
1: core::panicking::panic_fmt
2: core::panicking::panic
3: <rustc_resolve::Resolver>::finalize_import
4: <rustc_resolve::Resolver>::resolve_crate::{closure#0}
5: <rustc_resolve::Resolver>::resolve_crate
6: rustc_interface::passes::configure_and_expand
7: rustc_interface::passes::resolver_for_lowering_raw
[... omitted 1 frame ...]
8: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>
9: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
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: please attach the file at `/Volumes/T7/workspace/out-260219/scratch/rustc-ice-2026-02-20T08_55_51-7183.txt` to your bug report
note: rustc 1.95.0-nightly (7f99507f5 2026-02-19) running on x86_64-apple-darwin
query stack during panic:
#0 [resolver_for_lowering_raw] getting the resolver for lowering
end of query stack
error: aborting due to 1 previous error
Regression
Regression in nightly-2025-09-04
Command: cargo bisect-rustc --start=2025-01-01 --end=2026-02-18 --regress ice --preserve --script rustc -- import.rs --edition=2024
Notes
Code
A mutant of
tests/ui/resolve/ice-inconsistent-resolution-151213.rsMeta
rustc --version --verbose:Error output
Command:
rustc --edition=2024(ICEs on edition 2018, 2021, and 2024. Not on 2015)
Backtrace
Regression
Regression in nightly-2025-09-04
Command:
cargo bisect-rustc --start=2025-01-01 --end=2026-02-18 --regress ice --preserve --script rustc -- import.rs --edition=2024Notes
ICE location:
compiler/rustc_resolve/src/imports.rs Line-1075rust/compiler/rustc_resolve/src/imports.rs
Lines 1065 to 1075 in 7f99507
Duplication Check
import.imported_module.get().is_none()#147208 has identical ICE location, which does not ICE for now (and regression date also different.)