Xorg crashed with SIGABRT in OsAbort()

[MG]

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ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: xserver-xorg-core 2:1.19.5-0ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-16.19-lowlatency 4.13.4
Uname: Linux 4.13.0-16-lowlatency x86_64
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CrashCounter: 1
Date: Thu Oct 26 18:56:36 2017
DistUpgraded: 2017-10-23 15:48:44,103 ERROR got error from PostInstallScript ./xorg_fix_proprietary.py (g-exec-error-quark: Failed to execute child process “./xorg_fix_proprietary.py” (No such file or directory) (8))
DistroCodename: artful
DistroVariant: ubuntu
ExecutablePath: /usr/lib/xorg/Xorg
GraphicsCard:
 Intel Corporation HD Graphics 620 [8086:5916] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Lenovo HD Graphics 620 [17aa:224b]
InstallationDate: Installed on 2016-04-19 (554 days ago)
InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
MachineType: LENOVO 20HGS1RG00
ProcCmdline: /usr/lib/xorg/Xorg -core :1 -seat seat0 -auth /var/run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch
ProcEnviron: PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-16-lowlatency root=UUID=b8412798-404c-4b4f-bada-a6cc4220836d ro quiet splash vt.handoff=7
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 OsAbort ()
 ?? ()
 FatalError ()
 xf86VTEnter ()
 WakeupHandler ()
Title: Xorg crashed with SIGABRT in OsAbort()
UpgradeStatus: Upgraded to artful on 2017-10-23 (3 days ago)
UserGroups:

dmi.bios.date: 07/12/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: N1WET35W (1.14 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20HGS1RG00
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN1WET35W(1.14):bd07/12/2017:svnLENOVO:pn20HGS1RG00:pvrThinkPadT470s:rvnLENOVO:rn20HGS1RG00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T470s
dmi.product.name: 20HGS1RG00
dmi.product.version: ThinkPad T470s
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.83-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.2-0ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.2-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.5-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

[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 #1557346, 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.