invalid uninstantiatable type `(null)' in cast to `GObject'

[dino99]

Binary package hint: compiz

on natty i386 updated, get these errors logged into xsession-errors:

(gtk-window-decorator:2657): GLib-GObject-WARNING **: invalid uninstantiatable type `(null)' in cast to `GObject'

(gtk-window-decorator:2657): GLib-GObject-CRITICAL **: g_object_get_data: assertion `G_IS_OBJECT (object)' failed

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: compiz-gnome 1:0.9.2.1+glibmainloop3-0ubuntu5
ProcVersionSignature: Ubuntu 2.6.37-11.25-generic-pae 2.6.37-rc7
Uname: Linux 2.6.37-11-generic-pae i686
NonfreeKernelModules: nvidia
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/allscreens/options/active_plugins'
Date: Thu Jan 6 15:34:30 2011
ExecutablePath: /usr/bin/gtk-window-decorator
MachineType: ASUSTEK COMPUTER INC P5W DH Deluxe
PciDisplay: 06:00.0 VGA compatible controller [0300]: nVidia Corporation G86 [GeForce 8500 GT] [10de:0421] (rev a1) (prog-if 00 [VGA controller])
ProcEnviron:
 LANGUAGE=fr_FR:fr:en_GB:en
 LANG=fr_FR.UTF-8
 LC_MESSAGES=fr_FR.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.37-11-generic-pae root=UUID=9e61e83e-bca9-43cf-aa90-5a68892213fa ro vga=791 vt.handoff=7 crashkernel=384M-2G:64M,2G-:128M quiet splash
RelatedPackageVersions:
 xserver-xorg 1:7.5+6ubuntu6
 libgl1-mesa-glx 7.9+repack-1ubuntu3
 libdrm2 2.4.22-2ubuntu1
 xserver-xorg-video-intel N/A
 xserver-xorg-video-ati N/A
SourcePackage: compiz
XsessionErrors:
 (nm-applet:2565): Gtk-CRITICAL **: IA__gtk_widget_is_toplevel: assertion `GTK_IS_WIDGET (widget)' failed
 (process:2555): GLib-CRITICAL **: g_source_unref: assertion `source != NULL' failed
dmi.bios.date: 10/22/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3001
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5W DH Deluxe
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3001:bd10/22/2009:svnASUSTEKCOMPUTERINC:pnP5WDHDeluxe:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5WDHDeluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5W DH Deluxe
dmi.product.version: System Version
dmi.sys.vendor: ASUSTEK COMPUTER INC
system: distro = Ubuntu, architecture = i686, kernel = 2.6.37-11-generic-pae

[dino99 (9d9)]

got this similar one previouly on the same session:

(gnome-terminal:17400): GLib-GObject-WARNING **: invalid uninstantiatable type `(null)' in cast to `GObject'

(gnome-terminal:17400): GLib-GObject-CRITICAL **: g_object_get_data: assertion `G_IS_OBJECT (object)' failed

so this bug seems to be related to a dependency rather than compiz or gnome-terminal

[Omer Akram (om26er)]

Is this still an issue? I see the original reporter of the bug unsubscribed so Stefan if you see this bug still please let us know.

[Stefan Löffler (st.loeffler)]

I haven't switched to natty (amd64) but am still on maverick (with compiz 0.8.6 as provided by the official repos). Here it still occurs, so if there is a fix it hasn't been backported yet. I do intend to switch to natty when it is released, though, so I can reevaluate it there in about a month.

[Stefan Löffler (st.loeffler)]

After updating to natty I can confirm that this bug is gone in compiz 0.9.4.