### 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!

for (int i = 0; i < files.size(); i++) {
		memdelete(files[i]);
	}
	for (int i = 0; i < subdirs.size(); i++) {
		memdelete(subdirs[i]);
	}
}
void EditorFileSystem::_scan_filesystem() {
	ERR_FAIL_COND(!scanning || new_filesystem);
	
	String cpath;
	sources_changed.clear();
	file_cache.clear();
	String project = ProjectSettings::get_singleton()->get_resource_path();
	String fscache = EditorPaths::get_singleton()->get_project_settings_dir().path_join(CACHE_FILE_NAME);
	{
		Ref<FileAccess> f = FileAccess::open(fscache, FileAccess::READ);
		bool first = true;
		if (f.is_valid()) {
			
			while (!f->eof_reached()) {
				String l = f->get_line().strip_edges();
				if (first) {
					if (first_scan) {