### Godot version

4.1.rc.custom_build. c83f912bc

### System information

Ubuntu 22.04 CI

### Issue description

When executing
```
extends Node
func _process(delta):

	var temp_variable35241 = RichTextLabel.new()
	add_child(temp_variable35241)
	temp_variable35241.set_fit_content(true)
	temp_variable35241.parse_bbcode("3188932498")
	temp_variable35241.queue_free()
```
this code freeze project in CI for at least 60 seconds

### Steps to reproduce

Above

### Minimal reproduction project

N/A
alignment |= INLINE_ALIGNMENT_TO_TOP;
					} else if (subtag[1] == "center" || subtag[1] == "c") {
						alignment |= INLINE_ALIGNMENT_TO_CENTER;
					} else if (subtag[1] == "baseline" || subtag[1] == "l") {
						alignment |= INLINE_ALIGNMENT_TO_BASELINE;
					} else if (subtag[1] == "bottom" || subtag[1] == "b") {
						alignment |= INLINE_ALIGNMENT_TO_BOTTOM;
					}
				} else if (subtag.size() > 0) {
					if (subtag[0] == "top" || subtag[0] == "t") {
						alignment = INLINE_ALIGNMENT_TOP;
					} else if (subtag[0] == "center" || subtag[0] == "c") {
						alignment = INLINE_ALIGNMENT_CENTER;
					} else if (subtag[0] == "bottom" || subtag[0] == "b") {
						alignment = INLINE_ALIGNMENT_BOTTOM;
					}
				}
			}
			int end = p_bbcode.find("[", brk_end);
			if (end == -1) {
				end = p_bbcode.length();
			}
			String image = p_bbcode.substr(brk_end + 1, end - brk_end - 1);
			Ref<Texture2D> texture = ResourceLoader::load(image, "Texture2D");
			if (texture.is_valid()) {
				Rect2 region;
				OptionMap::Iterator region_option = bbcode_options.find("region");
				if (region_option) {
					Vector<String> region_values = region_option->value.split(",", false);
					if (region_values.size() == 4) {