LLVM ERROR: Broken module with -Cdebuginfo=2 -Zsanitizer=cfi -Clto

[matthiaskrgr]

Code

./src/test/ui/issues/issue-27901.rs

// run-pass
trait Stream { type Item; }
impl<'a> Stream for &'a str { type Item = u8; }
fn f<'s>(s: &'s str) -> (&'s str, <&'s str as Stream>::Item) {
    (s, 42)
}

fn main() {
    let fx = f as for<'t> fn(&'t str) -> (&'t str, <&'t str as Stream>::Item);
    assert_eq!(fx("hi"), ("hi", 42));
}

Meta

rustc --version --verbose:

rustc 1.65.0-nightly (0b79f758c 2022-08-18)
binary: rustc
commit-hash: 0b79f758c9aa6646606662a6d623a0752286cd17
commit-date: 2022-08-18
host: x86_64-unknown-linux-gnu
release: 1.65.0-nightly
LLVM version: 15.0.0

Error output

rustc ./issue-27901.rs -Cdebuginfo=2 -Zsanitizer=cfi -Clto

inlinable function call in a function with debug info must have a !dbg location
  call void @_ZN11issue_279011f17h923e371f4763f6b8E.cfi(ptr sret({ { ptr, i64 }, i8, [7 x i8] }) %6, ptr align 1 @3, i64 2)
inlinable function call in a function with debug info must have a !dbg location
  call void @_ZN11issue_279011f17h923e371f4763f6b8E.cfi(ptr sret({ { ptr, i64 }, i8, [7 x i8] }) %6, ptr align 1 @3, i64 2)
LLVM ERROR: Broken module found, compilation aborted!

Backtrace

same

[rcvalle]

@rustbot claim

[JohnTitor]

Triage: This is no longer ICE since today's nightly.
@rustbot labels: +E-needs-test

[matthiaskrgr]

I think this is still reproducible:

./tests/ui/associated-types/associated-types-doubleendediterator-object.rs

fn pairwise_sub(mut t: Box<dyn DoubleEndedIterator<Item=isize>>) -> isize {
    let mut result = 0;
    loop {
        let front = t.next();
        let back = t.next_back();
        match (front, back) {
            (Some(f), Some(b)) => { result += b - f; }
            _ => { return result; }
        }
    }
}

fn main() {
    let v = vec![1, 2, 3, 4, 5, 6];
    let r = pairwise_sub(Box::new(v.into_iter()));
    assert_eq!(r, 9);
}

rustc -Zsanitizer-cfi-normalize-integers -Clto -Zsanitizer=cfi -Ccodegen-units=1 -Cdebuginfo=2 -Copt-level=3 ./tests/ui/associated-types/associated-types-doubleendediterator-object.rs

inlinable function call in a function with debug info must have a !dbg location
  %24 = tail call { i64, i64 } @"_ZN103_$LT$alloc..vec..into_iter..IntoIter$LT$T$C$A$GT$$u20$as$u20$core..iter..traits..iterator..Iterator$GT$4next17hf0fad4eb49ef37d8E"(ptr noundef nonnull align 1 %12)
inlinable function call in a function with debug info must have a !dbg location
  %25 = tail call { i64, i64 } @"_ZN103_$LT$alloc..vec..into_iter..IntoIter$LT$T$C$A$GT$$u20$as$u20$core..iter..traits..iterator..Iterator$GT$4next17hf0fad4eb49ef37d8E"(ptr noundef nonnull align 1 %12)
LLVM ERROR: Broken module found, compilation aborted!

[Jules-Bertholet]

@rustbot label A-sanitizers