4 fail_compilation/b19717.d(16): Error: undefined identifier `Foo`, did you mean function `foo`?
5 fail_compilation/b19717.d(13): Error: forward reference to template `foo`
6 fail_compilation/b19717.d(13): Error: forward reference to inferred return type of function call `foo()`
10 enum bar
= __traits(getMember
, mixin(__MODULE__
), "foo");