[Issue 3602] ICE(tocsym.c) compiling a class, if its super class has preconditions

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=3602

--- Comment #11 from github-bugzilla at puremagic.com ---
Commit pushed to stable at https://github.com/dlang/dmd

https://github.com/dlang/dmd/commit/b79c250bc27659274aa3a93473cd8f550738e3ad
Handle bug 3602 and 5230, add tests for them.

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