Use a notification that something went wrong, and not a dialog. Debugging info belongs to .xsession-errors and no the UI. Reproducible: Always
*** Bug 312917 has been marked as a duplicate of this bug. ***
*** Bug 319842 has been marked as a duplicate of this bug. ***
Thank you for the bug report. As this report hasn't seen any changes in 5 years or more, we ask if you can please confirm that the issue still persists. If this bug is no longer persisting or relevant please change the status to resolved.