crash while joining two nodes (of different paths)

Summary:

Inkscape sometimes crashes when joining two different nodes of different paths. It occurs more often when tha paths have a path effect such as power stroke. And when you try to merge like three continuous paths one after another then inkscape will crash.

Steps to reproduce:

• open Inkscape
• create three strokes/paths
• add powerstroke effect to them
• join ending/starting node of first two strokes
• then, join it's ending node with last stokes's starting node

...

What should have happened?

It crashes

Version info

System info

Inkscape 1.4 (e7c3feb1, 2024-10-09)

                  Compile  (Run)
GLib version:     2.76.3
GTK version:      3.24.42 (3.24.42)
glibmm version:   2.66.6
gtkmm version:    3.24.9
libxml2 version:  2.11.4
libxslt version:  1.1.29
Cairo version:    1.18.0 (1.18.0)
Pango version:    1.50.14 (1.50.14)
HarfBuzz version: 8.0.1 (8.0.1)

OS version:       macOS 15.0.1 (24A348) arm64

Log

 0# Inkscape::Application::crash_handler(int) in /Applications/Inkscape.app/Contents/Resources/lib/inkscape/libinkscape_base.1.4.0.0.dylib
 1# _sigtramp in /usr/lib/system/libsystem_platform.dylib
 2# SPItem::i2dt_affine() const in /Applications/Inkscape.app/Contents/Resources/lib/inkscape/libinkscape_base.1.4.0.0.dylib
 3# KnotHolderEntity::update_knot() in /Applications/Inkscape.app/Contents/Resources/lib/inkscape/libinkscape_base.1.4.0.0.dylib
 4# BlurKnotHolderEntity::update_knot() in /Applications/Inkscape.app/Contents/Resources/lib/inkscape/libinkscape_base.1.4.0.0.dylib
 5# KnotHolder::update_knots() in /Applications/Inkscape.app/Contents/Resources/lib/inkscape/libinkscape_base.1.4.0.0.dylib
 6# Inkscape::UI::ShapeEditor::set_item(SPItem*) in /Applications/Inkscape.app/Contents/Resources/lib/inkscape/libinkscape_base.1.4.0.0.dylib
 7# Inkscape::XML::CompositeNodeObserver::notifyAttributeChanged(Inkscape::XML::Node&, unsigned int, Inkscape::Util::ptr_shared, Inkscape::Util::ptr_shared) in /Applications/Inkscape.app/Contents/Resources/lib/inkscape/libinkscape_base.1.4.0.0.dylib
 8# Inkscape::XML::SimpleNode::setAttributeImpl(char const*, char const*) in /Applications/Inkscape.app/Contents/Resources/lib/inkscape/libinkscape_base.1.4.0.0.dylib
 9# sp_repr_undo_log(Inkscape::XML::Event*) in /Applications/Inkscape.app/Contents/Resources/lib/inkscape/libinkscape_base.1.4.0.0.dylib
10# Inkscape::DocumentUndo::undo(SPDocument*) in /Applications/Inkscape.app/Contents/Resources/lib/inkscape/libinkscape_base.1.4.0.0.dylib
11# (anonymous namespace)::SimpleAction_signal_activate_callback(_GSimpleAction*, _GVariant*, void*) in /Applications/Inkscape.app/Contents/Resources/lib/libgiomm-2.4.1.dylib
12# g_closure_invoke in /Applications/Inkscape.app/Contents/Resources/lib/libgobject-2.0.0.dylib
13# signal_emit_unlocked_R in /Applications/Inkscape.app/Contents/Resources/lib/libgobject-2.0.0.dylib
14# g_signal_emit_valist in /Applications/Inkscape.app/Contents/Resources/lib/libgobject-2.0.0.dylib
15# g_signal_emit in /Applications/Inkscape.app/Contents/Resources/lib/libgobject-2.0.0.dylib
16# g_simple_action_activate in /Applications/Inkscape.app/Contents/Resources/lib/libgio-2.0.0.dylib
17# Gio::Action_Class::activate_vfunc_callback(_GAction*, _GVariant*) in /Applications/Inkscape.app/Contents/Resources/lib/libgiomm-2.4.1.dylib
18# Gio::ActionGroup_Class::activate_action_vfunc_callback(_GActionGroup*, char const*, _GVariant*) in /Applications/Inkscape.app/Contents/Resources/lib/libgiomm-2.4.1.dylib
19# gtk_application_accels_activate in /Applications/Inkscape.app/Contents/Resources/lib/libgtk-3.0.dylib
20# gtk_window_activate_key in /Applications/Inkscape.app/Contents/Resources/lib/libgtk-3.0.dylib
21# gtk_window_key_press_event in /Applications/Inkscape.app/Contents/Resources/lib/libgtk-3.0.dylib
22# Gtk::Widget::on_key_press_event(_GdkEventKey*) in /Applications/Inkscape.app/Contents/Resources/lib/libgtkmm-3.0.1.dylib
23# Gtk::Widget_Class::key_press_event_callback(_GtkWidget*, _GdkEventKey*) in /Applications/Inkscape.app/Contents/Resources/lib/libgtkmm-3.0.1.dylib
24# _gtk_marshal_BOOLEAN__BOXEDv in /Applications/Inkscape.app/Contents/Resources/lib/libgtk-3.0.dylib
25# _g_closure_invoke_va in /Applications/Inkscape.app/Contents/Resources/lib/libgobject-2.0.0.dylib
26# g_signal_emit_valist in /Applications/Inkscape.app/Contents/Resources/lib/libgobject-2.0.0.dylib
27# g_signal_emit in /Applications/Inkscape.app/Contents/Resources/lib/libgobject-2.0.0.dylib
28# gtk_widget_event_internal in /Applications/Inkscape.app/Contents/Resources/lib/libgtk-3.0.dylib
29# gtk_propagate_event in /Applications/Inkscape.app/Contents/Resources/lib/libgtk-3.0.dylib
30# gtk_main_do_event in /Applications/Inkscape.app/Contents/Resources/lib/libgtk-3.0.dylib
31# _gdk_event_emit in /Applications/Inkscape.app/Contents/Resources/lib/libgdk-3.0.dylib
32# gdk_event_dispatch in /Applications/Inkscape.app/Contents/Resources/lib/libgdk-3.0.dylib
33# g_main_context_dispatch in /Applications/Inkscape.app/Contents/Resources/lib/libglib-2.0.0.dylib
34# g_main_context_iterate in /Applications/Inkscape.app/Contents/Resources/lib/libglib-2.0.0.dylib
35# g_main_context_iteration in /Applications/Inkscape.app/Contents/Resources/lib/libglib-2.0.0.dylib
36# g_application_run in /Applications/Inkscape.app/Contents/Resources/lib/libgio-2.0.0.dylib
37# main in /Applications/Inkscape.app/Contents/MacOS/inkscape

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