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//@ run-pass
// Regression test for an obscure issue with the projection cache.
fn into_iter<I: Iterator>(a: &I) -> Groups<I> {
Groups { _a: a }
}
pub struct Groups<'a, I: 'a> {
_a: &'a I,
}
impl<'a, I: Iterator> Iterator for Groups<'a, I> {
type Item = Group<'a, I>;
fn next(&mut self) -> Option<Self::Item> {
None
}
}
pub struct Group<'a, I: Iterator + 'a>
where I::Item: 'a // <-- needed to trigger ICE!
{
_phantom: &'a (),
_ice_trigger: I::Item, // <-- needed to trigger ICE!
}
fn main() {
let _ = into_iter(&[0].iter().map(|_| 0)).map(|grp| {
let _g = grp;
});
}
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