Comment 2 for bug 799869

StacktraceTop:
 raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
 abort () at abort.c:92
 g_assertion_message (domain=<value optimized out>, file=<value optimized out>, line=<value optimized out>, func=0x7f5d6de6cff0 "g_type_instance_get_private", message=0x1caada0 "assertion failed: (parent_node->data && NODE_REFCOUNT (parent_node) > 0)") at /build/buildd/glib2.0-2.29.8/./glib/gtestutils.c:1425
 g_assertion_message_expr (domain=0x7f5d6de6452e "GLib-GObject", file=0x7f5d6de6ad58 "/build/buildd/glib2.0-2.29.8/./gobject/gtype.c", line=4531, func=0x7f5d6de6cff0 "g_type_instance_get_private", expr=<value optimized out>) at /build/buildd/glib2.0-2.29.8/./glib/gtestutils.c:1436
 g_type_instance_get_private (instance=0x1b81aa0, private_type=29610912) at /build/buildd/glib2.0-2.29.8/./gobject/gtype.c:4531