File: recursive-ice-101862.rs

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// issue: rust-lang/rust#101852
// ICE opaque type with non-universal region substs

pub fn ice(x: impl AsRef<str>) -> impl IntoIterator<Item = ()> {
//~^ WARN function cannot return without recursing
    vec![].append(&mut ice(x.as_ref()));
    //~^ ERROR expected generic type parameter, found `&str`

    Vec::new()
}

fn main() {}