1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/closure_args2.rs b/src/test/ui/type-alias-impl-trait/closure_args2.rs
new file mode 100644
index 000000000..82386c280
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/closure_args2.rs
@@ -0,0 +1,23 @@
+// run-pass
+
+#![feature(type_alias_impl_trait)]
+
+trait Foo {
+    // This was reachable in https://github.com/rust-lang/rust/issues/100800
+    fn foo(&self) { unreachable!() }
+}
+impl<T> Foo for T {}
+
+struct B;
+impl B {
+    fn foo(&self) {}
+}
+
+type Input = impl Foo;
+fn run1<F: FnOnce(Input)>(f: F, i: Input) {f(i)}
+fn run2<F: FnOnce(B)>(f: F, i: B) {f(i)}
+
+fn main() {
+    run1(|x: B| {x.foo()}, B);
+    run2(|x: B| {x.foo()}, B);
+}