/usr/bin/pulseaudio:6:raise:abort:pa_strlist_remove:pa_native_protocol_remove_server_string:module_native_protocol_unix_LTX_pa__done

The Ubuntu Error Tracker has been receiving reports about a problem regarding pulseaudio. This problem was most recently seen with package version 1:13.0-3ubuntu2, the problem page at https://errors.ubuntu.com/problem/bd0d691273ff0913dce8beca92c5f51fc5e1b6ae 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 and are a software developer, you can request it at http://forms.canonical.com/reports/.