GLTFDocument loader returns Freed Object at runtime

[huwpascoe]

Tested versions

4.3

System information

Godot v4.3.stable - Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 960 (NVIDIA; 32.0.15.6081) - Intel(R) Core(TM) i5-6600K CPU @ 3.50GHz (4 Threads)

Issue description

GLTFDocument is unable to load scenes at runtime if the gltf file contains "GODOT_single_root".

The resulting node is<Freed Object>.

Steps to reproduce

Save a gltf file with root_node_mode set as default (ROOT_NODE_MODE_SINGLE_ROOT), then load it and call generate_scene.

Minimal reproduction project (MRP)

gltfdocsave.zip

[aaronfranke]

Thank you for reporting this bug. This is a regression introduced by me in Godot 4.2 in PR #81851. I've fixed it in PR #98048 (master), PR #98049 (4.3), and PR #98051 (4.2).