StacktraceTop:
g_type_check_instance_cast () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
window_weak_notify_cb (data=0x55e03474aca0, where_the_window_was=0x55e034c4a100) at ../libwnck/class-group.c:511
weak_refs_notify () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
g_data_set_internal () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6600.0
g_object_unref () from /tmp/apport_sandbox_724l0o8d/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6600.0
StacktraceTop: check_instance_ cast () from /tmp/apport_ sandbox_ 724l0o8d/ usr/lib/ x86_64- linux-gnu/ libgobject- 2.0.so. 0.6600. 0 weak_notify_ cb (data=0x55e0347 4aca0, where_the_ window_ was=0x55e034c4a 100) at ../libwnck/ class-group. c:511 sandbox_ 724l0o8d/ usr/lib/ x86_64- linux-gnu/ libgobject- 2.0.so. 0.6600. 0 set_internal () from /tmp/apport_ sandbox_ 724l0o8d/ usr/lib/ x86_64- linux-gnu/ libglib- 2.0.so. 0.6600. 0 sandbox_ 724l0o8d/ usr/lib/ x86_64- linux-gnu/ libgobject- 2.0.so. 0.6600. 0
g_type_
window_
weak_refs_notify () from /tmp/apport_
g_data_
g_object_unref () from /tmp/apport_