Godot crashes when editing style boxes of `TabContainer`

[em-s-h]

Tested versions

• Reproducible in: Godot v4.3.stable

System information

Godot v4.3.stable unknown - Arch Linux #1 SMP PREEMPT_DYNAMIC Thu, 19 Dec 2024 21:29:01 +0000 - Wayland - Vulkan (Forward+) - integrated Intel(R) HD Graphics 5500 (BDW GT2) - Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz (4 Threads)

Issue description

godot_crash.mp4

Verbose output (normal output doesn't have a backtrace): godot_save3.log

Steps to reproduce

The video above shows how to make godot crash, but I'll write it anyways.

• Open the MRP (the warning that appears can be ignored);
• Open settings_window.tscn;
• Open the theme editor;
• Click on the script icon to open it on an external editor (I've only got it to happen with an external editor open);
• Focus on the external editor window for a bit;
• Go back to the theme editor, and select TabContainer on the Type list;
• Change a property of any style box (tab_unselected and BG Color seem to crash more often);

In the video Godot crashes here, but if that doesn't happen do this:

• After changing a property quickly click on Tab 2 on the theme preview

If that doesn't crash repeat the last 2 steps a few more times

Minimal reproduction project (MRP)

mrp.tgz