Suddenly found possible cause/workaround for the bug. In 12.10 environment variable GTK_MODULES is set for all DE (including KDE or XFCE). If variable is unset, gdk_error_trap_pop may disappear appear when starting GTK applications.
On my desktop: $ env | grep GTK_MODULES GTK_MODULES=canberra-gtk-module:canberra-gtk-module $ fslint-gui /usr/bin/fslint-gui:1950: GtkWarning: IA__gdk_error_trap_pop: assertion `gdk_error_traps != NULL' failed gtk.main () $ unset GTK_MODULES $ fslint-gui <no GtkWarning message> Probably this bug is related to bug 385577 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gtk+2.0 in Ubuntu. https://bugs.launchpad.net/bugs/1075928 Title: Please, silence IA__gdk_error_trap_pop: assertion `gdk_error_traps != NULL' failed Status in “gtk+2.0” package in Ubuntu: Confirmed Bug description: On Kubuntu 12.10, whenever a gtk application is opened from the konsole, the terminal gets flooded with Gdk-CRITICAL **: IA__gdk_error_trap_pop: assertion `gdk_error_traps != NULL' failed which makes the konsole almost impossible to use after a gtk application has been backgrounded. The only way to start gtk apps from the konsole (or a terminal) keeping the konsole usable is to start them redirecting stderr to /dev/null, which should not be the case. This message turns a probably innocuous bug in gtk apps into a severe annoyance also to the konsole. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk+2.0/+bug/1075928/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
