(firefox:8047): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

[Darren Albers]

Binary package hint: firefox

Firefox seems to hang on me (It eventually comes back but the whole system is unresponsive for 2-3 minutes) with both of my systems, one is a Mac Mini and the other is a T61. Neither are fresh installs of Hardy but both are up to date.

Here is the error I see in the console when the problem comes up:
(firefox:8047): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

[Darren Albers (dalbers)]

Note, this happens without any plugins enabled.

[JB (jb-ubuntu1804)]

Same here, but only if i start a Flash application like youtube bild.de (video) or something else.

Debug:

(firefox:23189): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Segmentation fault

$ cat /etc/issue.net
Ubuntu 8.04

$ firefox -V
Mozilla Firefox 3.0b5, Copyright (c) 1998 - 2008 mozilla.org

Add-On`s available:
AdBlock Plus 0.7.5.4
DownloadHelper 3.0.3
Firefox Showcase 0.9.4.8
FlagFox 3.2.3
ShowIP 0.8.06build0210
Ubuntu Firefox Modifications 0.5

[Darren Albers (dalbers)]

That seems to be the case here as well, I just never noticed since every site seems to use Flash :/

I wonder if this is a Flash-Plugin issue or a Firefix issue. I will switch to Gnash and test later today.

[Darren Albers (dalbers)]

Switching to swfdec solved my problem... What is strange is that this problem didn't occur until the last Firefox update before Hardy went Final... Odd.

[Darren Albers (dalbers)]

Well it looks like this link explains the problem:

https://lists.ubuntu.com/archives/hardy-changes/2008-April/011149.html

" * fix "frequent crashes with flash on youtube"; we fix this by
     demoting libflashsupport from depends: to suggests: (LP: #192888)
     This has positive as well as negative consequences:
      (+) increased stability for firefox and nspluginwrapper
      (-) pulseaudio users reported that this breaks sound if flash
          while other applications are running that use the sound
          device for output.
     Users that installed libflashsupport during hardy cycle should
     uninstall it to increase stability.
"

I am uninstalling libflashsupport and will reinstall the Flash-plugin and see if it stabilizes.

[Darren Albers (dalbers)]

Closing this as invalid, removing libflashsupport solved the stability issue for me.

[John Vivirito (gnomefreak)]

Darren that is the problem but you will run into no sound in flash using pulseaudio this bug is being worked on very hard to fix

[John Vivirito (gnomefreak)]

see bug #192888 for more info on no sound