#0  0x00007fac6d152cd0 in g_type_check_instance_cast () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#1  0x00007fac6cf5c4e1 in window_weak_notify_cb (data=0x55e03474aca0, where_the_window_was=0x55e034c4a100) at ../libwnck/class-group.c:511
  [Error: class-group.c was not found in source tree]
#2  0x00007fac6d135b57 in weak_refs_notify () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#3  0x00007fac6d01f05e in g_data_set_internal () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6600.0
#4  0x00007fac6d136d23 in g_object_unref () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#5  0x00007fac681bd55c in block2_data_unref (_userdata_=0x55e03482ea40) at budgie-visualspace/src/libvisualspace.so.p/visualspace.c:762
  [Error: visualspace.c was not found in source tree]
#6  block2_data_unref (_userdata_=0x55e03482ea40) at budgie-visualspace/src/libvisualspace.so.p/visualspace.c:755
  [Error: visualspace.c was not found in source tree]
#7  0x00007fac6d130fe0 in g_closure_unref () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#8  0x00007fac6d1490c0 in g_signal_handlers_destroy () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#9  0x00007fac6d1364f1 in g_object_real_dispose () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#10 0x00007fac6d1380f1 in g_object_run_dispose () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#11 0x00007fac6d7a2f80 in gtk_grid_forall (container=<optimized out>, include_internals=<optimized out>, callback=0x7fac6d93a030 <gtk_widget_destroy>, callback_data=0x0) at ../../../../gtk/gtkgrid.c:540
  [Error: gtkgrid.c was not found in source tree]
#12 0x00007fac6d70fe6a in gtk_container_destroy (widget=0x55e034c41590) at ../../../../gtk/gtkcontainer.c:1701
  [Error: gtkcontainer.c was not found in source tree]
#13 0x00007fac6d1318fa in g_closure_invoke () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#14 0x00007fac6d14442d in signal_emit_unlocked_R.isra.0 () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#15 0x00007fac6d14ac21 in g_signal_emit_valist () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#16 0x00007fac6d14ad83 in g_signal_emit () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#17 0x00007fac6d942c80 in gtk_widget_dispose (object=0x55e034c41590) at ../../../../gtk/gtkwidget.c:12162
  [Error: gtkwidget.c was not found in source tree]
#18 0x00007fac6d1380f1 in g_object_run_dispose () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#19 0x00007fac681bcfb1 in ____lambda8_ (_data3_=<optimized out>) at budgie-visualspace/src/libvisualspace.so.p/visualspace.c:1212
  [Error: visualspace.c was not found in source tree]
#20 _____lambda8__gsource_func (self=<optimized out>) at budgie-visualspace/src/libvisualspace.so.p/visualspace.c:1212
  [Error: visualspace.c was not found in source tree]
#21 0x00007fac6d03f3ef in g_main_context_dispatch () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6600.0
#22 0x00007fac6d03f798 in g_main_context_iterate.constprop () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6600.0
#23 0x00007fac6d03fab3 in g_main_loop_run () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6600.0
#24 0x00007fac43d3b12d in zeitgeist_log_construct (object_type=<optimized out>) at log.c:1199
  [Error: log.c was not found in source tree]
#25 0x00007fac43d3c239 in zeitgeist_log_new () at log.c:1208
  [Error: log.c was not found in source tree]
#26 0x00007fac43e9628e in synapse_zeitgeist_relevancy_backend_constructor (type=<optimized out>, n_construct_properties=0, construct_properties=<optimized out>) at budgie-applications-menu/applications-menu/src/libslingshot.so.p/synapse-core/relevancy-backend-zg.c:1247
  [Error: relevancy-backend-zg.c was not found in source tree]
#27 0x00007fac6d1374ad in g_object_new_internal () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#28 0x00007fac6d13872d in g_object_new_with_properties () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#29 0x00007fac6d1393b1 in g_object_new () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#30 0x00007fac43e9615d in synapse_zeitgeist_relevancy_backend_construct (object_type=<optimized out>) at budgie-applications-menu/applications-menu/src/libslingshot.so.p/synapse-core/relevancy-backend-zg.c:1215
  [Error: relevancy-backend-zg.c was not found in source tree]
#31 0x00007fac43e96189 in synapse_zeitgeist_relevancy_backend_new () at budgie-applications-menu/applications-menu/src/libslingshot.so.p/synapse-core/relevancy-backend-zg.c:1222
  [Error: relevancy-backend-zg.c was not found in source tree]
#32 0x00007fac43e92748 in synapse_relevancy_service_initialize_relevancy_backend (self=0x7fac5c031a10) at budgie-applications-menu/applications-menu/src/libslingshot.so.p/synapse-core/relevancy-service.c:247
  [Error: relevancy-service.c was not found in source tree]
#33 synapse_relevancy_service_constructor (type=<optimized out>, n_construct_properties=0, construct_properties=0x0) at budgie-applications-menu/applications-menu/src/libslingshot.so.p/synapse-core/relevancy-service.c:331
  [Error: relevancy-service.c was not found in source tree]
#34 0x00007fac6d1374ad in g_object_new_internal () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#35 0x00007fac6d13872d in g_object_new_with_properties () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#36 0x00007fac6d1393b1 in g_object_new () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
#37 0x00007fac43e9267d in synapse_relevancy_service_construct (object_type=<optimized out>) at budgie-applications-menu/applications-menu/src/libslingshot.so.p/synapse-core/relevancy-service.c:232
  [Error: relevancy-service.c was not found in source tree]
#38 synapse_relevancy_service_new () at budgie-applications-menu/applications-menu/src/libslingshot.so.p/synapse-core/relevancy-service.c:239
  [Error: relevancy-service.c was not found in source tree]
#39 synapse_relevancy_service_get_default () at budgie-applications-menu/applications-menu/src/libslingshot.so.p/synapse-core/relevancy-service.c:217
  [Error: relevancy-service.c was not found in source tree]
#40 0x0000000000000001 in ?? ()
#41 0x0000000000000000 in ?? ()