Xorg crashed with SIGABRT in OsAbort()

[Ogilvierothchild]

upgraded from chromeos to a galliumos kernel, then dist-upgrade to stock ubuntu kernel

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-core 2:1.17.3-2ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0
Uname: Linux 4.4.0-2-generic x86_64
ApportVersion: 2.19.4-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Wed Feb 10 14:31:34 2016
ExecutablePath: /usr/lib/xorg/Xorg
InstallationDate: Installed on 2016-02-09 (1 days ago)
InstallationMedia: GalliumOS 1.0beta1 "Vivid Vervet" - Release amd64 (20151109.1)
ProcCmdline: /usr/lib/xorg/Xorg -nolisten tcp -core -auth /var/run/slim.auth
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 OsAbort ()
 ?? ()
 FatalError ()
 ?? ()
 __libc_start_main (main=0x55f7df0d4f00, argc=6, argv=0x7ffdc6e3d9a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdc6e3d998) at libc-start.c:289
Title: Xorg crashed with SIGABRT in OsAbort()
UpgradeStatus: Upgraded to xenial on 2016-02-10 (0 days ago)
UserGroups:

[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 #1543192, 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.

[Daniel van Vugt (vanvugt)]

I can't see any evidence of which Xorg crash this is.

[Launchpad Janitor (janitor)]

[Expired for xorg-server (Ubuntu) because there has been no activity for 60 days.]