deja-dup crashed with SIGSEGV in __pthread_once_slow()

[Charlie]

Running in Virtualbox. Latest updates were being installed no applications running.

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: deja-dup 37.1-1fakesync1
ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
Uname: Linux 4.15.0-10-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Mar 2 14:51:40 2018
ExecutablePath: /usr/bin/deja-dup
InstallationDate: Installed on 2018-01-27 (34 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180126)
JournalErrors:
 -- Logs begin at Sat 2018-01-27 12:04:01 GMT, end at Fri 2018-03-02 14:56:00 GMT. --
 Mar 02 14:47:05 username-VirtualBox NetworkManager[567]: ((src/devices/nm-device.c:1452)): assertion '<dropped>' failed
 Mar 02 14:47:12 username-VirtualBox gnome-session-binary[800]: CRITICAL: Unable to create a DBus proxy for GnomeScreensaver: Error calling StartServiceByName for org.gnome.ScreenSaver: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.gnome.ScreenSaver exited with status 1
 Mar 02 14:47:45 username-VirtualBox pulseaudio[1141]: [pulseaudio] bluez5-util.c: GetManagedObjects() failed: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
ProcCmdline: deja-dup --prompt
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fbc4a73f588: movl $0x0,(%rax)
 PC (0x7fbc4a73f588) ok
 source "$0x0" ok
 destination "(%rax)" (0xbbadbeef) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: deja-dup
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
 __pthread_once_slow (once_control=0x7fbc4a9a702c, init_routine=0x7fbc42acc490 <__once_proxy>) at pthread_once.c:116
 Gigacage::ensureGigacage() () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
 bmalloc::Heap::Heap(bmalloc::HeapKind, std::lock_guard<bmalloc::StaticMutex>&) () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
 bmalloc::PerProcess<bmalloc::PerHeapKind<bmalloc::Heap> >::getSlowCase() () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
Title: deja-dup crashed with SIGSEGV in __pthread_once_slow()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo