[Issue 12201] Crash on forward reference import within mixed in template

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12201

--- Comment #6 from github-bugzilla at puremagic.com ---
Commit pushed to stable at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/e1db093d7373076379c65702c9218ed950c0ecca
Move issue 12201 test case to compilable/testfwdref.d

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