x86-interrupt ABI no longer compiles with never result #143072
Description
Code
I tried this code:
#![feature(abi_x86_interrupt)] extern "x86-interrupt" fn foo() -> ! { todo!() }I expected to see this happen: It compiles.
Instead, this happened:
error: invalid signature for `extern "x86-interrupt"` function --> <source>:3:36 | 3 | extern "x86-interrupt" fn foo() -> ! { | ^ | = note: functions with the "custom" ABI cannot have a return type help: remove the return type --> <source>:3:36 | 3 | extern "x86-interrupt" fn foo() -> ! { | ^ Version it worked on
It most recently worked on:
rustc 1.90.0-nightly (28f1c8079 2025-06-24) binary: rustc commit-hash: 28f1c807911c63f08d98e7b468cfcf15a441e34b commit-date: 2025-06-24 host: x86_64-unknown-linux-gnu release: 1.90.0-nightly LLVM version: 20.1.7 Version with regression
rustc --version --verbose:
rustc 1.90.0-nightly (0fa4ec6cd 2025-06-25) binary: rustc commit-hash: 0fa4ec6cde46fa17ab07acb5531cfe0dc1349ffa commit-date: 2025-06-25 host: x86_64-unknown-linux-gnu release: 1.90.0-nightly LLVM version: 20.1.7