OK windowPreview.js isn't the only place it can happen. The logs in comments #2 and #3 show it happening in popupMenu.js too.
** Summary changed: - GNOME Shell crashes when I close any application by right click in the dock [clutter_actor_dispose: assertion failed: (priv->parent == NULL) from ubuntu-d...@ubuntu.com/windowPreview.js:642] + GNOME Shell crashes with signal 6 when right clicking on the dock [clutter_actor_dispose: assertion failed: (priv->parent == NULL)] ** Also affects: gnome-shell (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell-extension-ubuntu-dock in Ubuntu. https://bugs.launchpad.net/bugs/2056506 Title: GNOME Shell crashes with signal 6 when right clicking on the dock [clutter_actor_dispose: assertion failed: (priv->parent == NULL)] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2056506/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs