`gtk_tree_path_new_from_string: assertion '*path != '\000'' failed` in Layers & Objects menu.

Summary:

Inkscape glitches upon changing the object in the layers & objects menu.

Steps to reproduce:

• open Inkscape.
• New document.
• Create 2 paths or more.
• Open Layers & Objects menu.
• move path above the first object, then below.
• see a flood of gtk_tree_path_new_from_string: assertion '*path != '\000'' failed errors in the terminal.

What happened?

Inkscape became glitchy.

What should have happened?

It shouldn't.

Sample attachments:

A video showing it:

2024-07-06_14-28-03

Version info

Inkscape 1.3.2 (091e20ef0f, 2023-11-25, custom)

    GLib version:     2.80.3
    GTK version:      3.24.42
    glibmm version:   2.66.7
    gtkmm version:    3.24.9
    libxml2 version:  2.13.1
    libxslt version:  1.1.41
    Cairo version:    1.18.0
    Pango version:    1.54.0
    HarfBuzz version: 9.0.0

    OS version:       Artix Linux

Additional

The bug happens on Shades of Purple / custom GTK. Before it wasn't happening and I'm reporting it here regardless because Inkscape should be able to handle style errors.