https://issues.dlang.org/show_bug.cgi?id=15984
--- Comment #9 from MichaelZ <dlang....@bregalad.de> --- If this can't be readily fixed, then what exactly must we do (or rather, not do) in our code to avoid triggering the issue? Must we avoid using pre- (and post?) conditions in an interface at all? Or must we avoid using pre- (and post?) conditions on 'override' functions? Or something else entirely? So far we've had the issue pop up roughly 4 times, some of those after making apparently unrelated changes; cleaning up the problematic places once and for all now that we have the issue in mind, will avoid frustrating bug hunting in the future... --
