Comment 8 for bug 764041

Happened in Precise (bug #970195).
---
StacktraceTop:
g_assertion_message (domain=<optimized out>, file=<optimized out>, line=<optimized out>, func=0x4071d0 "_gconf_cleaner_value_to_string", message=0x7f45a2a23ba0 "code should not be reached") at /build/buildd/glib2.0-2.32.0/./glib/gtestutils.c:1861
_gconf_cleaner_value_to_string (value=0x162c980, indent=6) at main.c:269
_gconf_cleaner_save_on_response (dialog=0x1667000, response_id=<optimized out>, data=0x151d0f0) at main.c:411
g_closure_invoke (closure=0x1701eb0, return_value=0x0, n_param_values=2, param_values=0x7fff31a34350, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.32.0/./gobject/gclosure.c:777
signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x0, instance_and_params=0x7fff31a34350) at /build/buildd/glib2.0-2.32.0/./gobject/gsignal.c:3547