Comment 2 for bug 1436103

StacktraceTop:
 panel_widget_size_allocate (widget=<optimized out>, allocation=0x7ffddb053ea0) at panel-widget.c:1411
 g_closure_invoke (closure=0x20bca80, return_value=0x0, n_param_values=2, param_values=0x7ffddb053bd0, invocation_hint=0x7ffddb053b70) at /build/buildd/glib2.0-2.43.92/./gobject/gclosure.c:768
 signal_emit_unlocked_R (node=node@entry=0x20bce50, detail=detail@entry=0, instance=instance@entry=0x226c120, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7ffddb053bd0) at /build/buildd/glib2.0-2.43.92/./gobject/gsignal.c:3479
 g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7ffddb053d60) at /build/buildd/glib2.0-2.43.92/./gobject/gsignal.c:3305
 g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.43.92/./gobject/gsignal.c:3361