### Godot version

4.0 dev Beta 10

### System information

MacBook Pro M1 Max

### Issue description

After I imported font.ttf file and move it from one folder to another under ://res godot suddenly crashed, and it still crashes after restart.

### Steps to reproduce

Import some font.ttf file and try to move into different folder

### Minimal reproduction project

N/A
FontAdvanced *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	Vector2i size = _get_size(fd, p_size);
	ERR_FAIL_COND(!_ensure_cache_for_size(fd, size));
	HashMap<int32_t, FontGlyph> &gl = fd->cache[size]->glyph_map;
	gl[p_glyph].advance = p_advance;
	gl[p_glyph].found = true;
}
Vector2 TextServerAdvanced::_font_get_glyph_offset(const RID &p_font_rid, const Vector2i &p_size, int64_t p_glyph) const {