VirtualBox crashed with SIGSEGV in pa_threaded_mainloop_signal()

[lnx]

crashed when starting the imported vm LibreELEC-Virtual.x86_64-8.0.2.ova

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: virtualbox-qt 5.2.8-dfsg-5
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
ApportVersion: 2.20.9-0ubuntu2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 6 10:48:13 2018
ExecutablePath: /usr/lib/virtualbox/VirtualBox
InstallationDate: Installed on 2018-04-04 (2 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Beta amd64 (20180404)
ProcCmdline: /usr/lib/virtualbox/VirtualBox --comment LibreELEC --startvm 0ad69dda-99d1-4b94-b271-5a224aa2b3bd --no-startvm-errormsgbox
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fcafeb5797e <pa_threaded_mainloop_signal+14>: mov 0x20(%rdi),%rdi
 PC (0x7fcafeb5797e) ok
 source "0x20(%rdi)" (0x00000201) not located in a known VMA region (needed readable region)!
 destination "%rdi" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: virtualbox
StacktraceTop:
 pa_threaded_mainloop_signal () 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-11.1.so
 pa_pdispatch_run () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
 ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
Title: VirtualBox crashed with SIGSEGV in pa_threaded_mainloop_signal()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1755472, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.