diff --git a/tests/ui/type-alias-impl-trait/recursive-fn-tait.rs b/tests/ui/type-alias-impl-trait/recursive-fn-tait.rs new file mode 100644 index 0000000000000..3d1759097d6b3 --- /dev/null +++ b/tests/ui/type-alias-impl-trait/recursive-fn-tait.rs @@ -0,0 +1,17 @@ +// test for #113326 +#![feature(type_alias_impl_trait)] + +pub type Diff = impl Fn(usize) -> usize; + +pub fn lift() -> Diff { + |_: usize |loop {} +} + +pub fn add( + n: Diff, + m: Diff, +) -> Diff { + move |x: usize| m(n(x)) //~ ERROR: concrete type differs +} + +fn main() {} diff --git a/tests/ui/type-alias-impl-trait/recursive-fn-tait.stderr b/tests/ui/type-alias-impl-trait/recursive-fn-tait.stderr new file mode 100644 index 0000000000000..b2898a21190ad --- /dev/null +++ b/tests/ui/type-alias-impl-trait/recursive-fn-tait.stderr @@ -0,0 +1,14 @@ +error: concrete type differs from previous defining opaque type use + --> $DIR/recursive-fn-tait.rs:14:5 + | +LL | move |x: usize| m(n(x)) + | ^^^^^^^^^^^^^^^^^^^^^^^ expected `{closure@$DIR/recursive-fn-tait.rs:7:5: 7:16}`, got `{closure@$DIR/recursive-fn-tait.rs:14:5: 14:20}` + | +note: previous use here + --> $DIR/recursive-fn-tait.rs:7:5 + | +LL | |_: usize |loop {} + | ^^^^^^^^^^^^^^^^^^ + +error: aborting due to previous error +