After oem-config complete setting up the user, logging in via lightdm displayed a crash handler

[Martin Wimpress ]

While testing OEM config fixes for 15.04 I encountered this crash handler on first login after oem-config had setup the new user.

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: xserver-xorg-core 2:1.17.1-0ubuntu3
ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
Uname: Linux 3.19.0-10-generic x86_64
ApportVersion: 2.17-0ubuntu1
Architecture: amd64
Date: Tue Mar 31 17:00:02 2015
ExecutablePath: /usr/bin/Xorg
InstallationDate: Installed on 2015-03-31 (0 days ago)
InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Beta amd64 (20150331)
ProcCmdline: X -br -ac -noreset -nolisten tcp -background none vt7 :0
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 LANGUAGE=en_GB:en
SegvAnalysis: Skipped: missing required field "Disassembly"
Signal: 11
SourcePackage: xorg-server
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 rtHeapSimpleAllocBlock (pHeapInt=0x7f3b8f26b000, cb=64, uAlignment=32) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Runtime/common/alloc/heapsimple.cpp:498
 RTHeapSimpleAlloc (hHeap=<optimized out>, cb=<optimized out>, cbAlignment=<optimized out>) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Runtime/common/alloc/heapsimple.cpp:415
 HGSMIHeapBufferAlloc (pHeap=pHeap@entry=0x7f3b96925ee2, cbBuffer=cbBuffer@entry=56) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/GuestHost/HGSMI/HGSMICommon.cpp:340
 HGSMIHeapAlloc (pHeap=0x7f3b96925ee2, cbData=32, u8Channel=<optimized out>, u16ChannelInfo=<optimized out>) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/GuestHost/HGSMI/HGSMICommon.cpp:305
 VBoxHGSMIProcessDisplayInfo (pCtx=0x7f3b96925ee2, cDisplay=0, cOriginX=0, cOriginY=0, offStart=0, cbPitch=4096, cWidth=1024, cHeight=768, cBPP=32, fFlags=1) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/common/VBoxVideo/Modesetting.cpp:257