/usr/sbin/ofonod:11:g_str_hash:g_hash_table_lookup_node:g_hash_table_insert_internal:mmgui_history_probe:history_context_create

The Ubuntu Error Tracker has been receiving reports about a problem regarding ofono. This problem was most recently seen with package version 1.17.bzr6921+16.10.20160819.6-0ubuntu1, the problem page at https://errors.ubuntu.com/problem/8ab8a2d9cf86c64f93df8336f0a00dbbad3b1f97 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/.