Comment 3 for bug 1542667

StacktraceTop:
 g_type_check_instance (type_instance=type_instance@entry=0x24fa040) at /build/glib2.0-EZCcr2/glib2.0-2.46.2/./gobject/gtype.c:4140
 g_signal_emit_valist (instance=0x24fa040, signal_id=641, detail=0, var_args=var_args@entry=0x7ffdecf48680) at /build/glib2.0-EZCcr2/glib2.0-2.46.2/./gobject/gsignal.c:3168
 g_signal_emit (instance=<optimized out>, signal_id=signal_id@entry=641, detail=detail@entry=0) at /build/glib2.0-EZCcr2/glib2.0-2.46.2/./gobject/gsignal.c:3439
 g_context_specific_source_dispatch (source=0x270a650, callback=<optimized out>, user_data=<optimized out>) at /build/glib2.0-EZCcr2/glib2.0-2.46.2/./gio/gcontextspecificgroup.c:54
 g_main_context_dispatch (context=0x17cddc0) at /build/glib2.0-EZCcr2/glib2.0-2.46.2/./glib/gmain.c:3154