ERROR:document-undo.cpp:172:void sp_document_maybe_done(SPDocument*, const gchar*, unsigned int, Glib::ustring): assertion failed: (doc->priv->sensitive) Program received signal SIGABRT, Aborted. 0x90deae42 in __kill () (gdb) bt #0 0x90deae42 in __kill () #1 0x90deae34 in kill$UNIX2003 () #2 0x90e5d23a in raise () #3 0x90e69679 in abort () #4 0x021a4067 in g_assertion_message () #5 0x021a46d8 in g_assertion_message_expr () #6 0x000512c6 in sp_document_maybe_done () #7 0x000514cc in sp_document_done () #8 0x005fda09 in Inkscape::Widgets::LayerSelector::_lockLayer () #9 0x00603e9f in sigc::compose1_functor, sigc::bound_const_mem_functor0 >::operator() () #10 0x0146d08a in Glib::SignalProxyNormal::slot0_void_callback () #11 0x020fff59 in g_closure_invoke () #12 0x02112445 in signal_emit_unlocked_R () #13 0x02113761 in g_signal_emit_valist () #14 0x02113a69 in g_signal_emit () #15 0x0192279a in gtk_toggle_button_toggled () #16 0x01922bfc in gtk_toggle_button_clicked () #17 0x020fff59 in g_closure_invoke () #18 0x02111d48 in signal_emit_unlocked_R () #19 0x02113761 in g_signal_emit_valist () #20 0x02113a69 in g_signal_emit () #21 0x0179314a in gtk_button_clicked () #22 0x005ff91d in Inkscape::Widgets::LayerSelector::_selectLayer () #23 0x0002bfcc in _layer_hierarchy_changed () #24 0x000c10d3 in Inkscape::ObjectHierarchy::_trim_for_release () #25 0x0016105e in SPObject::releaseReferences () #26 0x0016195e in sp_object_detach () #27 0x00147891 in sp_group_remove_child () #28 0x00446410 in Inkscape::XML::CompositeNodeObserver::notifyChildRemoved () #29 0x00454a87 in Inkscape::XML::SimpleNode::removeChild () #30 0x00455e5a in Inkscape::XML::EventAdd::_undoOne () #31 0x00455e1c in Inkscape::XML::undo_log_to_observer () #32 0x00456d0f in sp_repr_undo_log () #33 0x00050a97 in sp_document_undo () #34 0x000ec245 in sp_undo () #35 0x002f3bcf in sp_action_perform () #36 0x020fff59 in g_closure_invoke () #37 0x021120d3 in signal_emit_unlocked_R () #38 0x02113761 in g_signal_emit_valist () #39 0x02113a69 in g_signal_emit () #40 0x017787c0 in _gtk_action_emit_activate () #41 0x0192bf19 in button_clicked () #42 0x020fff59 in g_closure_invoke () #43 0x021120d3 in signal_emit_unlocked_R () #44 0x02113761 in g_signal_emit_valist () #45 0x02113a69 in g_signal_emit () #46 0x0179314a in gtk_button_clicked () #47 0x017952f8 in gtk_real_button_released () #48 0x020fff59 in g_closure_invoke () #49 0x02111d48 in signal_emit_unlocked_R () #50 0x02113761 in g_signal_emit_valist () #51 0x02113a69 in g_signal_emit () #52 0x017930aa in gtk_button_released () #53 0x0179438b in gtk_button_button_release () #54 0x0184d85b in _gtk_marshal_BOOLEAN__BOXED () #55 0x020fff59 in g_closure_invoke () #56 0x02112258 in signal_emit_unlocked_R () #57 0x021134a7 in g_signal_emit_valist () #58 0x02113a69 in g_signal_emit () #59 0x0197c546 in gtk_widget_event_internal () #60 0x0184ba58 in gtk_propagate_event () #61 0x0184bfcd in gtk_main_do_event () #62 0x01bd6845 in gdk_event_dispatch () #63 0x0217d51d in g_main_context_dispatch () #64 0x021813ab in g_main_context_iterate () #65 0x02181687 in g_main_loop_run () #66 0x0184afa1 in gtk_main () #67 0x00fb859b in Gtk::Main::run () #68 0x00005614 in sp_main_gui () #69 0x001d60c2 in Inkscape::NSApplication::Application::run () #70 0x00003be2 in main () (gdb) q