unity-control-center crashed with SIGSEGV in g_type_check_instance_is_fundamentally_a()

[Doug McMahon]

Test case : System Settings > Appearances

ProblemType: Crash
DistroRelease: Ubuntu 14.10
Package: unity-control-center 14.10.0+14.10.20140604-0ubuntu2
ProcVersionSignature: Ubuntu 3.15.0-6.11-generic 3.15.0
Uname: Linux 3.15.0-6-generic x86_64
ApportVersion: 2.14.3-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Jun 28 10:26:02 2014
ExecutablePath: /usr/bin/unity-control-center
InstallationDate: Installed on 2014-05-28 (30 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140520)
ProcCmdline: unity-control-center
ProcEnviron:
 PATH=(custom, no user)
 LANGUAGE=en_US
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fdbe10bfab7 <g_type_check_instance_is_fundamentally_a+39>: movzbl 0x14(%rax),%edx
 PC (0x7fdbe10bfab7) ok
 source "0x14(%rax)" (0x00000014) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity-control-center
StacktraceTop:
 g_type_check_instance_is_fundamentally_a (type_instance=0x2ddb000, fundamental_type=80) at /build/buildd/glib2.0-2.41.1/./gobject/gtype.c:3978
 g_object_unref (_object=0x2ddb000) at /build/buildd/glib2.0-2.41.1/./gobject/gobject.c:3026
 ?? () from /usr/lib/x86_64-linux-gnu/unity-control-center-1/panels/libappearance.so
 g_type_create_instance (type=<optimized out>) at /build/buildd/glib2.0-2.41.1/./gobject/gtype.c:1866
 g_object_new_internal (class=class@entry=0x2bec760, params=params@entry=0x7fff9d15f680, n_params=3) at /build/buildd/glib2.0-2.41.1/./gobject/gobject.c:1741
Title: unity-control-center crashed with SIGSEGV in g_type_check_instance_is_fundamentally_a()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
usr_lib_unity-control-center:
 activity-log-manager 0.9.7-0ubuntu14
 deja-dup 30.0-0ubuntu6

[Apport retracing service (apport)]

StacktraceTop:
 g_type_check_instance_is_fundamentally_a (type_instance=0x2ddb000, fundamental_type=80) at /build/buildd/glib2.0-2.41.1/./gobject/gtype.c:3978
 g_object_unref (_object=0x2ddb000) at /build/buildd/glib2.0-2.41.1/./gobject/gobject.c:3026
 setup_unity_settings (self=0x12a2480) at cc-appearance-panel.c:1850
 cc_appearance_panel_init (self=0x12a2480) at cc-appearance-panel.c:2088
 g_type_create_instance (type=<optimized out>) at /build/buildd/glib2.0-2.41.1/./gobject/gtype.c:1866

[Launchpad Janitor (janitor)]

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

[ventrical (dale-f-beaudoin)]

Ahh yes. :)

[dinamic (dinamic6661)]

same here

[Graham Lucking (lucking)]

I confirm

[Huck-bernhard (huck-bernhard)]

the same is on i386

[James Hunt (jamesodhunt)]

This happens every time the user attempts to access the unity settings. Running from the command-line:

$ gnome-control-center

(unity-control-center:6424): Gtk-CRITICAL **: gtk_radio_button_set_group: assertion '!g_slist_find (group, radio_button)' failed

(unity-control-center:6424): Gtk-CRITICAL **: gtk_radio_button_set_group: assertion '!g_slist_find (group, radio_button)' failed

(unity-control-center:6424): Gtk-CRITICAL **: gtk_radio_button_set_group: assertion '!g_slist_find (group, radio_button)' failed

(unity-control-center:6424): unity-control-center-WARNING **: Could not load /usr/share/themes/Adwaita/index.theme: No such file or directory
Erreur de segmentation (core dumped)

[Launchpad Janitor (janitor)]

This bug was fixed in the package unity-control-center - 14.10.0+14.10.20140702.1-0ubuntu1

---------------
unity-control-center (14.10.0+14.10.20140702.1-0ubuntu1) utopic; urgency=low

  [ Robert Ancell ]
  * Add symbols that were added in revision 12731

  [ Ubuntu daily release ]
  * New rebuild forced

  [ Iain Lane ]
  * [appearance] Fix a g_object_unref on a GSettingsSchema to be
    g_settings_schema_unref (LP: #1335438)
 -- Ubuntu daily release <email address hidden> Wed, 02 Jul 2014 12:28:57 +0000

[Nicholas Skaggs (nskaggs)]

As a workaround in the interim if needed, you can backdate libglib2; I used

http://mirrors.kernel.org/ubuntu/pool/main/g/glib2.0/libglib2.0-0_2.40.0-2_amd64.deb

or

http://mirrors.kernel.org/ubuntu/pool/main/g/glib2.0/libglib2.0-0_2.40.0-2_i386.deb