Closed
Description
I found this issue when I was compiling one of my large projects, and was able to track it down to the code below. Unfortunately, I haven't been able to reproduce the issue on any other machines other than this one (which is running Ubuntu 20.02.4 on Oracle Cloud, if that matters). The error only seems to happen in release mode in nightly.
Code
#[derive(Clone)]
pub struct Foo(Bar, u32);
#[derive(Clone, Copy)]
pub struct Bar(u8, u8, u8);
fn main() {
let foo: Vec<Foo> = Vec::new();
let _ = foo.clone();
}
Meta
rustc --version --verbose
:
rustc 1.66.0-nightly (dcb376115 2022-10-20)
binary: rustc
commit-hash: dcb376115066d111dbf5f13d5ac2a2dbe8c12add
commit-date: 2022-10-20
host: aarch64-unknown-linux-gnu
release: 1.66.0-nightly
LLVM version: 15.0.2
Error output
Invalid bitcast
%63 = bitcast <4 x i32> %62 to <4 x i24>
Invalid bitcast
%65 = bitcast <4 x i32> %64 to <4 x i24>
in function _ZN67_$LT$alloc..vec..Vec$LT$T$C$A$GT$$u20$as$u20$core..clone..Clone$GT$5clone17h90016bd0a1a635e4E
LLVM ERROR: Broken function found, compilation aborted!