/usr/bin/nm-applet:11:__GI___libc_free:g_hash_table_remove_all_nodes:g_hash_table_remove_all:nma_icons_reload:g_closure_invoke

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding network-manager-applet. This problem was most recently seen with package version 1.2.0-0ubuntu0.16.04.4, the problem page at https://errors.ubuntu.com/problem/340df27e05dd2f7233102083d4e1dfd95754bfe9 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/.