/usr/lib/x86_64-linux-gnu/unity/unity-panel-service:11:gtk_menu_tracker_model_changed:ffi_call_unix64:ffi_call:g_cclosure_marshal_generic:g_closure_invoke

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding unity. This problem was most recently seen with package version 7.5.0+17.10.20170609-0ubuntu1, the problem page at https://errors.ubuntu.com/problem/1ffd9e87c36e0188323cba8f22a4362ee1d5b8f4 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker you can request it at http://forms.canonical.com/reports/.