### Godot version

v4.0.stable.official [92bee43ad]

### System information

Windows 10, 64bit

### Issue description

First, please run the reproduction project.
When I run the test scene, It report error like follow and app exited. 
![image](https://user-images.githubusercontent.com/35988767/229076194-f737bcb6-6c9b-4aa0-9bd5-3dbd36bc8d03.png)
And I don't know where was error.



### Steps to reproduce

1. Open the reproduction project.
2. Open scene 'user:\\xd\XActors\Weapon\Gun\Rifle\XRifle.tscn'
3. Assign the scene's Meshinstance's mesh with 'user:\\xd\XActors\Weapon\Gun\Rifle\XRifle01.res'
4. Run the scene
Opps, the scene exited.
![GIF](https://user-images.githubusercontent.com/35988767/229077075-4b18b9e0-933e-47f6-b6a8-0af966574884.gif)


### Minimal reproduction project

[GlbTest.zip](https://github.com/godotengine/godot/files/11120181/GlbTest.zip)

NOTE: The project that I provided was picked up from my owner project. Sorry I can't provide a minimal reproduction project because I don't know which step cause this issue. I was test like this:
Create a project, import the glb file, create meshinstance and assign mesh, but there was not error!

efsd->parent = fs;
			int idx2 = 0;
			for (int j = 0; j < fs->get_subdir_count(); j++) {
				if (efsd->name.naturalnocasecmp_to(fs->get_subdir(j)->get_name()) < 0) {
					break;
				}
				idx2++;
			}
			if (idx2 == fs->get_subdir_count()) {
				fs->subdirs.push_back(efsd);
			} else {
				fs->subdirs.insert(idx2, efsd);
			}
			fs = efsd;
		} else {
			fs = fs->get_subdir(idx);
		}
	}
	int cpos = -1;
	for (int i = 0; i < fs->files.size(); i++) {
		if (fs->files[i]->file == file) {
			cpos = i;
			break;
		}
	}
	r_file_pos = cpos;
	*r_d = fs;
	return cpos != -1;
}
String EditorFileSystem::get_file_type(const String &p_file) const {