Xwayland crashed with SIGABRT in OsAbort()

[Seth Forshee]

Rebooted after dist-upgrade today (2018-02-24) and am unable to log into the desktop for any session type other than Unity.

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: xwayland 2:1.19.6-1ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-11.12-generic 4.15.5
Uname: Linux 4.15.0-11-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: GNOME
Date: Sat Feb 24 13:55:54 2018
DistUpgraded: 2017-04-27 08:21:46,120 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
DistroCodename: bionic
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/Xwayland
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Dell HD Graphics 5500 [1028:0665]
InstallationDate: Installed on 2017-03-30 (331 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Beta amd64 (20170329)
MachineType: Dell Inc. XPS 13 9343
ProcCmdline: /usr/bin/Xwayland :0 -rootless -terminate -core -listen 4 -listen 5 -displayfd 6
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-11-generic.efi.signed root=UUID=9cc54d76-3127-4203-9567-c722ecd42778 ro quiet splash vt.handoff=1
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 OsAbort ()
 ?? ()
 FatalError ()
 ?? ()
 ?? ()
Title: Xwayland crashed with SIGABRT in OsAbort()
UpgradeStatus: Upgraded to bionic on 2017-04-27 (303 days ago)
UserGroups: adm cdrom dialout dip libvirt lpadmin lxd plugdev sambashare sbuild sudo
dmi.bios.date: 12/08/2016
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 0TM99H
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA11:bd12/08/2016:svnDellInc.:pnXPS139343:pvr:rvnDellInc.:rn0TM99H:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: XPS 13 9343
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.13.1+18.04.20171116-0ubuntu1
version.libdrm2: libdrm2 2.4.90-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.3.3-0ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 17.3.3-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu1
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+git20171229-1
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 #1731911, 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.