Rollup merge of rust-lang#107355 - JohnTitor:issue-60755, r=compiler-errors

Add regression test for rust-lang#60755

Closes rust-lang#60755
r? compiler-errors
Signed-off-by: Yuki Okushi <jtitor@2k36.org>

Author: matthiaskrgr

tests/ui/traits/alias/issue-60755.rs

@@ -0,0 +1,12 @@
+// check-pass
+
+#![feature(trait_alias)]
+
+struct MyStruct {}
+trait MyFn = Fn(&MyStruct);
+
+fn foo(_: impl MyFn) {}
+
+fn main() {
+    foo(|_| {});
+}