tests/ui/closures/2229_closure_analysis/issue-89606.rs


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// Regression test for #89606. Used to ICE.
//
//@ check-pass
//@ revisions: twenty_eighteen twenty_twentyone
//@ [twenty_eighteen] edition: 2018
//@ [twenty_twentyone] edition: 2021

struct S<'a>(Option<&'a mut i32>);

fn by_ref(s: &mut S<'_>) {
    (|| {
        let S(_o) = s;
        s.0 = None;
    })();
}

fn by_value(s: S<'_>) {
    (|| {
        let S(ref _o) = s;
        let _g = s.0;
    })();
}

struct V<'a>((Option<&'a mut i32>,));

fn nested(v: &mut V<'_>) {
    (|| {
        let V((_o,)) = v;
        v.0 = (None, );
    })();
}

fn main() {
    let mut s = S(None);
    by_ref(&mut s);
    by_value(s);

    let mut v = V((None, ));
    nested(&mut v);
}