gnome-shell crashed with SIGABRT in g_assertion_message()

[Attila Hammer]

If I enabling screen magnifier in GNOME Control Center accessibility pane or manual enabling the org.gnome.desktop.a11y.applications screen-magnifier-enabled setting, GNOME Shell producing this crash.

Some error messages from syslog:
Mar 14 06:29:22 hammera-Satellite-L300 gnome-session[17489]: WARNING: Application 'gnome-shell-classic.desktop' killed by signal 6
Mar 14 06:29:29 hammera-Satellite-L300 gnome-session[17489]: WARNING: Application 'gnome-shell-classic.desktop' killed by signal 6
Mar 14 06:29:29 hammera-Satellite-L300 gnome-session[17489]: WARNING: App 'gnome-shell-classic.desktop' respawning too quickly
Mar 14 06:29:29 hammera-Satellite-L300 gnome-session[17489]: CRITICAL: We failed, but the fail whale is dead. Sorry....
Mar 14 06:29:52 hammera-Satellite-L300 gnome-session[17489]: Gdk-WARNING: gnome-session: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.#012

GNOME Shell builtin magnifier is important to work with low vision users, previoush month not have problem this feature working.

Attila

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: gnome-shell 3.10.4-0ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
Uname: Linux 3.13.0-17-generic i686
ApportVersion: 2.13.3-0ubuntu1
Architecture: i386
CrashCounter: 1
CurrentDesktop: GNOME
Date: Fri Mar 14 06:28:51 2014
DisplayManager: lightdm
ExecutablePath: /usr/bin/gnome-shell
GsettingsChanges: b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
InstallationDate: Installed on 2013-12-13 (90 days ago)
InstallationMedia: BeLin 3.02 i386
ProcCmdline: /usr/bin/gnome-shell --mode=classic
Signal: 6
SourcePackage: gnome-shell
StacktraceTop:
 g_assertion_message () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_assertion_message_expr () from /lib/i386-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/libgjs.so.0
 gjs_object_from_g_fundamental () from /usr/lib/libgjs.so.0
 gjs_value_from_g_argument () from /usr/lib/libgjs.so.0
Title: gnome-shell crashed with SIGABRT in g_assertion_message()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Launchpad Janitor (janitor)]

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

[Tim Lunn (darkxst)]

upcoming gjs update should fix this, in the meantime you can test with ppa:darkxst/gjs-test

[Attila Hammer (hammera)]

Tim, I confirming positive test result.
After I added your suggested PPA and install all awailable upgrades, when logout and login happened the screen magnification feature works correct again when I click the screen magnifier menu item in top bar/accessibility category.
When will be land this newest GJS upstream version with official Trusty repository?

Attila

[Tim Lunn (darkxst)]

Its in trusty-proposed now, will migrate from there in about a week

[Jens Bremmekamp (nem75)]

You can easily (but very unobviously) recover from this horrible bug:

- Login to Gnome -> "oh no" screen appears
- Press Ctrl + Alt + F3
- Login to the terminal with the same user as before
- run
DISPLAY=:0 gsettings set org.gnome.desktop.a11y.applications screen-magnifier-enabled false
- run
sudo service lightdm restart
- Login to Gnome again and rejoice

Deleting the gnome config files, even creating a new user and trying to log in with that one did exactly squat for me.