https://bugs.kde.org/show_bug.cgi?id=479870
--- Comment #9 from Emmet O'Neill <emmetoneill....@gmail.com> --- I spent quite a bit of time investigating this today and it seems to be a problem with the generation of Storyboard Docker thumbnail images when a Transform Mask is active. I don't have a fix just yet... but basically my understanding of the problem is this:if we switch to a different document while the Storyboard Docker is updating its thumbnails Krita tries to cancel the regeneration (via`KisAsyncAnimationRendererBase::clearFrameRegenerationState`). This seems to cause KisImage to get stuck in an infinite waiting loops as we wait for `KisUpdaterContext::waitForDone` to finish (but, for some reason I don't know yet, it never does). Workaround #1 (deleting the storyboard content form the KRA file) prevents the issue because there is no longer any need to do/cancel the storyboard docker thumbnail image regeneration. Workaround #2 is still a mystery to me right now because I don't understand how the Transformation Masks are factoring into the problem, although it definitely is, because hiding the Transformation Mask also prevents the problem from happening. More investigation is needed, but I'm getting closer. -- You are receiving this mail because: You are watching all bug changes.
