gnome-shell crashed with SIGTRAP in g_task_return_now ("X Wayland crashed; aborting")

[Rocko]

https://errors.ubuntu.com/problem/2bee46d654bf98b7f32986cb50b0688c07eb4f45

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This happened after I entered the password to unlock the screensaver (note that this was not after a suspend/resume cycle). The unlock screen froze for some time (after displaying asterisks to represent some of the password), then went black, then came back (displaying more asterisks this time), then went black, then gnome-shell crashed and burned and I found this in /var/crash when I logged back in.

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: gnome-shell 3.26.0-0ubuntu1
Uname: Linux 4.13.3-041303-generic x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Sep 28 11:33:27 2017
DisplayManager: gdm3
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/gnome-shell
InstallationDate: Installed on 2017-08-16 (42 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
ProcCmdline: /usr/bin/gnome-shell
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
Signal: 5
SourcePackage: gnome-shell
StacktraceTop:
 () at /usr/lib/x86_64-linux-gnu/libmutter-1.so.0
 () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
 () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: gnome-shell crashed with signal 5
UpgradeStatus: Upgraded to artful on 2017-08-17 (42 days ago)
UserGroups: adm bumblebee cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 ?? ()
 g_task_return_now (task=0x5634045c2000) at ../../../../gio/gtask.c:1145
 complete_in_idle_cb (task=0x5634045b3030) at ../../../../gio/gtask.c:1159
 g_main_dispatch (context=0x563404303580) at ../../../../glib/gmain.c:3148

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

Tracking in:
https://errors.ubuntu.com/problem/2bee46d654bf98b7f32986cb50b0688c07eb4f45

[Daniel van Vugt (vanvugt)]

Zero crashes after 18.04 so consider it fixed.