Confusing error messages when type mismatches involve types with same name

[jjcnn]

See test/src/e2e_vm_tests/test_programs/should_fail/language/import_star_name_clash/.

In the line the type of the argument is wrong:

    let my_enum_function_wrong_type = project_my_enum_b(my_enum_a_variant_legal); // Error - wrong MyEnum

The type of my_enum_a_variant_legal is a::MyEnum, but the argument type of project_my_enum_b is b::MyEnum. The error is caugt correctly with the following error message:

Mismatched types.
expected: MyEnum
found:    MyEnum.

This is clearly unhelpful. The found and expected types should report a full callpath to their respecitve declaration of MyEnum.