#0  0x00007fc4b70505c0 in meta_window_appears_focused () from /tmp/apport_sandbox_wCZuhr/usr/lib/libmutter.so.0
#1  0x00007fc4b702f891 in meta_window_actor_get_paint_volume () from /tmp/apport_sandbox_wCZuhr/usr/lib/libmutter.so.0
#2  0x00007fc4b6395f8a in _clutter_actor_get_paint_volume_mutable () from /tmp/apport_sandbox_wCZuhr/usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
#3  0x00007fc4b63c0095 in clutter_clone_get_paint_volume () from /tmp/apport_sandbox_wCZuhr/usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
#4  0x00007fc4b6395f8a in _clutter_actor_get_paint_volume_mutable () from /tmp/apport_sandbox_wCZuhr/usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
#5  0x00007fc4b63a9414 in _clutter_actor_finish_queue_redraw () from /tmp/apport_sandbox_wCZuhr/usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
#6  0x00007fc4b63f53ce in _clutter_stage_do_update () from /tmp/apport_sandbox_wCZuhr/usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
#7  0x00007fc4b63df199 in clutter_clock_dispatch () from /tmp/apport_sandbox_wCZuhr/usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
#8  0x00007fc4b568f127 in g_main_context_dispatch () from /tmp/apport_sandbox_wCZuhr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fc4b568f380 in g_main_context_iterate.isra () from /tmp/apport_sandbox_wCZuhr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fc4b568f6a2 in g_main_loop_run () from /tmp/apport_sandbox_wCZuhr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fc4b704069c in meta_run () from /tmp/apport_sandbox_wCZuhr/usr/lib/libmutter.so.0
#12 0x0000000000402197 in main ()