D-Programming-Language/dmd — pull request #705 by yebblies (2012-02-10 12:15:12+00:00)
Title: Issue 7462 - Error message with _error_ in overridden function

When there is an error in the parameter types, default arguments or return type, propagate the error to the function's type.

http://d.puremagic.com/issues/show_bug.cgi?id=7462