[LTS 26.1-rc.1] Project crashes if calling Geometry2D polygons blending functions #1176

Tested versions

Reproducible in:
26.1-rc.1
26.1-beta.0
Not Reproducible in:
4.4 or below

System information

Redot v26.1.rc.1 - Windows 11 (build 26100) - Multi-window, 1 monitor - OpenGL 3 (Compatibility) - NVIDIA GeForce GTX 1060 with Max-Q Design (NVIDIA; 32.0.15.8129) - Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz (12 threads) - 15.85 GB memory

Issue description

If i try in Geometry2D class call this polygons blending function this will cause to crash project

Geometry2D.intersect_polygons()
Geometry2D.clip_polygons()
Geometry2D.merge_polygons()
Geometry2D.exclude_polygons()

Error:
ERROR: FATAL: Index p_index = 1 is out of bounds (size() = 1).
at: get (./core/templates/cowdata.h:189)
GDScript backtrace (most recent call first):
[0] _ready (res://control.gd:8)

This issue i discovered while i use Breakable Glass(https://github.com/Stand43/godot_breakable_glass_custom) asset in assets library

Steps to reproduce

Create a new project in Redot Engine LTS 26.1-beta.0 or -rc.1
Add simple script, where in _ready function calling Geometry2D class function intersect_polygons, or clip_polygons, or exclude_polygons, or merge_polygons
Run the project.
Project will crash with no errors, if not exported.

Minimal reproduction project (MRP)

This project contains one scene, control.tscn. control.tscn has a script control.gd attached which handles blend polygons and print output to logs, but this cause crash in LTS versions.

polygon-blending-crash.zip