Add null-pointer checks to QCocoaEventDispatcher::
currentModalSession():
- window->handle() may return nullptr if the window
has been destroyed.
- We call beginModalSessionForWindow, which processes
events. This can potentially destroy or delete the
current window; pointers to it must be checked again.
This also has the effect that currentModalSessionCached
is not set to a session that does not have a window,
also prevents clearing the cleanupModalSessionsNeeded
flag for such sessions.
Task-number: QTBUG-66536
Change-Id: Ie055933c872a8ede3c938882fb2d4f7cf8ff3c81
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
eba1d56fad