Comment 2 for bug 1058814

StacktraceTop:
 xfce_appfinder_category_model_icon_theme_changed (model=0x7fa8e4007780) at appfinder-category-model.c:591
 xfce_appfinder_window_icon_theme_changed (window=0x7fa8f5f231e0) at appfinder-window.c:1457
 g_closure_invoke (closure=0x7fa8f611c180, return_value=0x0, n_param_values=1, param_values=0x7fffbfcede40, invocation_hint=0x7fffbfcedde0) at /build/buildd/glib2.0-2.34.0/./gobject/gclosure.c:777
 signal_emit_unlocked_R (node=node@entry=0x7fa8f5f510f0, detail=detail@entry=0, instance=instance@entry=0x7fa8f5f06880, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fffbfcede40) at /build/buildd/glib2.0-2.34.0/./gobject/gsignal.c:3551
 g_signal_emit_valist (instance=0x7fa8f5f06880, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffbfcee088) at /build/buildd/glib2.0-2.34.0/./gobject/gsignal.c:3300