This crash occurred during the development phase of 14.04. Are you able to reproduce it in the final release (with apport enabled) or the current development release?
** Changed in: xfwm4 (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1273023 Title: xfwm4 assert failure: *** Error in `xfwm4': free(): invalid next size (fast): 0x00007f18a5092540 *** To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfwm4/+bug/1273023/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs