https://bugs.kde.org/show_bug.cgi?id=371990
--- Comment #16 from clush...@gmx.net --- I could reproduce the crash. It's due to remove undo not restoring the child widgets. Subsequent undo commands assume the child widget exists and access a deleted widget. I've splitted and updated the patch to fix this issue as well. -- You are receiving this mail because: You are watching all bug changes.