Fixed the segfaults on application exit. The BracketMatcher, CallTipWidget, and CompletionWidget were using the text control as their parents. This should not be a problem, but for some reason it resulted in problems during shutdown. I suspect that PyQt is bugged and was deleting the C++ objects a second time in the garbage collection phase after they had already been deleted automatically by the C++ layer of Qt.
Fixed the segfaults on application exit. The BracketMatcher, CallTipWidget, and CompletionWidget were using the text control as their parents. This should not be a problem, but for some reason it resulted in problems during shutdown. I suspect that PyQt is bugged and was deleting the C++ objects a second time in the garbage collection phase after they had already been deleted automatically by the C++ layer of Qt.
