StacktraceTop: lookup_iface_entry_I (type_instance=0x917d4d8, iface_type=148828968) at /build/buildd/glib2.0-2.28.2/./gobject/gtype.c:561 type_lookup_iface_vtable_I (type_instance=0x917d4d8, iface_type=148828968) at /build/buildd/glib2.0-2.28.2/./gobject/gtype.c:616 type_node_check_conformities_UorL (type_instance=0x917d4d8, iface_type=148828968) at /build/buildd/glib2.0-2.28.2/./gobject/gtype.c:3445 type_node_conforms_to_U (type_instance=0x917d4d8, iface_type=148828968) at /build/buildd/glib2.0-2.28.2/./gobject/gtype.c:3475 g_type_check_instance_is_a (type_instance=0x917d4d8, iface_type=148828968) at /build/buildd/glib2.0-2.28.2/./gobject/gtype.c:3961
StacktraceTop: iface_entry_ I (type_instance= 0x917d4d8, iface_type= 148828968) at /build/ buildd/ glib2.0- 2.28.2/ ./gobject/ gtype.c: 561 iface_vtable_ I (type_instance= 0x917d4d8, iface_type= 148828968) at /build/ buildd/ glib2.0- 2.28.2/ ./gobject/ gtype.c: 616 check_conformit ies_UorL (type_instance= 0x917d4d8, iface_type= 148828968) at /build/ buildd/ glib2.0- 2.28.2/ ./gobject/ gtype.c: 3445 conforms_ to_U (type_instance= 0x917d4d8, iface_type= 148828968) at /build/ buildd/ glib2.0- 2.28.2/ ./gobject/ gtype.c: 3475 check_instance_ is_a (type_instance= 0x917d4d8, iface_type= 148828968) at /build/ buildd/ glib2.0- 2.28.2/ ./gobject/ gtype.c: 3961
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