I can consistently get kwin crashes simply by using VirtualBox and clicking OK at various
points when making changes to the configuration and/or managing a VM.
https://bugzilla.redhat.com/show_bug.cgi?id=1351190
was filed using the auto reporting tools. But it seems there are many similar bugs that
have gone back to last year. It is just that I've had to use VirtualBox on a project
recently and having to wait while kwin restarts itself every time I make changes to a VM
is getting annoying.
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You're Welcome Zachary Quinto