//@ check-pass // regression test for #91489 use std::borrow::Borrow; use std::borrow::Cow; pub struct VariantType {} pub struct VariantTy {} impl Borrow for VariantType { fn borrow(&self) -> &VariantTy { unimplemented!() } } impl ToOwned for VariantTy { type Owned = VariantType; fn to_owned(&self) -> VariantType { unimplemented!() } } impl VariantTy { pub fn as_str(&self) -> () {} } // the presence of this was causing all attempts to call `as_str` on // `Cow<'_, VariantTy>, including in itself, to not find the method static _TYP: () = { let _ = || { // should be found Cow::Borrowed(&VariantTy {}).as_str(); }; }; fn main() { // should be found Cow::Borrowed(&VariantTy {}).as_str() }