StacktraceTop: lookup_iface_entry_I (iface_node=0x29c0b10, entries=0xc12e0f66c9ef0f66) at /build/buildd/glib2.0-2.41.3/./gobject/gtype.c:580 type_lookup_iface_vtable_I (vtable_ptr=0x0, iface_node=0x29c0b10, node=0x7fbb567399a0 <gtk_css_value_number_free>) at /build/buildd/glib2.0-2.41.3/./gobject/gtype.c:635 type_node_check_conformities_UorL (have_lock=0, support_prerequisites=0, support_interfaces=1, iface_node=0x29c0b10, node=0x7fbb567399a0 <gtk_css_value_number_free>) at /build/buildd/glib2.0-2.41.3/./gobject/gtype.c:3451 type_node_conforms_to_U (support_prerequisites=0, support_interfaces=1, iface_node=0x29c0b10, node=0x7fbb567399a0 <gtk_css_value_number_free>) at /build/buildd/glib2.0-2.41.3/./gobject/gtype.c:3481 g_type_check_instance_cast (type_instance=type_instance@entry=0x7fbb56d508c0 <px_singletons>, iface_type=43780880) at /build/buildd/glib2.0-2.41.3/./gobject/gtype.c:4016
StacktraceTop: iface_entry_ I (iface_ node=0x29c0b10, entries= 0xc12e0f66c9ef0 f66) at /build/ buildd/ glib2.0- 2.41.3/ ./gobject/ gtype.c: 580 iface_vtable_ I (vtable_ptr=0x0, iface_node= 0x29c0b10, node=0x7fbb567399a0 <gtk_css_ value_number_ free>) at /build/ buildd/ glib2.0- 2.41.3/ ./gobject/ gtype.c: 635 check_conformit ies_UorL (have_lock=0, support_ prerequisites= 0, support_ interfaces= 1, iface_node= 0x29c0b10, node=0x7fbb567399a0 <gtk_css_ value_number_ free>) at /build/ buildd/ glib2.0- 2.41.3/ ./gobject/ gtype.c: 3451 conforms_ to_U (support_ prerequisites= 0, support_ interfaces= 1, iface_node= 0x29c0b10, node=0x7fbb567399a0 <gtk_css_ value_number_ free>) at /build/ buildd/ glib2.0- 2.41.3/ ./gobject/ gtype.c: 3481 check_instance_ cast (type_instance= type_instance@ entry=0x7fbb56d 508c0 <px_singletons>, iface_type= 43780880) at /build/ buildd/ glib2.0- 2.41.3/ ./gobject/ gtype.c: 4016
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