VirtualBox crashed with SIGABRT in pa_mainloop_prepare()

[Chris Sharp]

This happened upon boot. Not sure what I did to trigger it.

ProblemType: Crash
DistroRelease: Ubuntu 16.10
Package: virtualbox-qt 5.1.6-dfsg-2
ProcVersionSignature: Ubuntu 4.8.0-21.23-generic 4.8.0
Uname: Linux 4.8.0-21-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.3-0ubuntu7
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Oct 10 10:33:45 2016
ExecutablePath: /usr/lib/virtualbox/VirtualBox
InstallationDate: Installed on 2016-05-27 (137 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
ProcCmdline: /usr/lib/virtualbox/VirtualBox --comment Windows\ 10\ Professional --startvm 59714507-397b-47fc-8b64-c33c45ae1fda --no-startvm-errormsgbox
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 6
SourcePackage: virtualbox
StacktraceTop:
 pa_mainloop_prepare () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
 pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
 pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-9.0.so
Title: VirtualBox crashed with SIGABRT in pa_mainloop_prepare()
UpgradeStatus: Upgraded to yakkety on 2016-10-01 (9 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 pa_mainloop_prepare (m=m@entry=0x7fc8fcad21b0, timeout=<optimized out>) at pulse/mainloop.c:787
 pa_mainloop_iterate (m=0x7fc8fcad21b0, block=<optimized out>, retval=0x0) at pulse/mainloop.c:923
 pa_mainloop_run (m=0x7fc8fcad21b0, retval=retval@entry=0x0) at pulse/mainloop.c:944
 thread (userdata=0x7fc8fcad2170) at pulse/thread-mainloop.c:100
 internal_thread_func (userdata=0x7fc8fcad4690) at pulsecore/thread-posix.c:81