tests/ui/error-codes/E0390.rs - third_party/github.com/rust-lang/rust - Git at Google

 struct Foo {
     x: i32
 }

 impl *mut Foo {} //~ ERROR E0390

 impl fn(Foo) {} //~ ERROR E0390

 fn main() {
 }
	struct Foo {
	x: i32
	}

	impl *mut Foo {} //~ ERROR E0390

	impl fn(Foo) {} //~ ERROR E0390

	fn main() {
	}