Alias and distinct types didn't check the underlying type wasn't compile time or optional.

test/test_suite/types/bad_typedefs.c3

@@ -0,0 +1,13 @@
+module test;
+import std;
+
+struct Foo { struct x { int a; } }
+alias Floo = $typeof(Foo.x); // #error: You cannot create an alias for a member reference as it is a compile time type
+alias Void = void?;  // #error: You cannot create an alias for an optional type
+typedef Floo2 = $typeof(Foo.x); // #error: You cannot create a distinct type for a member reference
+typedef Void2 = void?; // #error: You cannot create a distinct type from
+
+fn void main()
+{
+
+}