[rustc.git] / src / test / ui / impl-trait / issue-49685.rs

// run-pass
// Regression test for #49685: drop elaboration was not revealing the
// value of `impl Trait` returns, leading to an ICE.

fn main() {
    let _ = Some(())
        .into_iter()
        .flat_map(|_| Some(()).into_iter().flat_map(func));
}

fn func(_: ()) -> impl Iterator<Item = ()> {
    Some(()).into_iter().flat_map(|_| vec![])
}
Commit	Line	Data
b7449926	1	// run-pass
0531ce1d XL	2	// Regression test for #49685: drop elaboration was not revealing the
0531ce1d XL	3	// value of `impl Trait` returns, leading to an ICE.
223e47cc	4
0531ce1d XL	5	fn main() {
	6	let _ = Some(())
	7	.into_iter()
	8	.flat_map(\|_\| Some(()).into_iter().flat_map(func));
1a4d82fc	9	}
223e47cc	10
0531ce1d XL	11	fn func(_: ()) -> impl Iterator<Item = ()> {
0531ce1d XL	12	Some(()).into_iter().flat_map(\|_\| vec![])
223e47cc	13	}