### 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
}
		
		String bbcode_value;
		int main_value_pos = bbcode_name.find("=");
		if (main_value_pos > -1) {
			bbcode_value = bbcode_name.substr(main_value_pos + 1);
			bbcode_name = bbcode_name.substr(0, main_value_pos);
		}
		if (tag.begins_with("/") && tag_stack.size()) {
			bool tag_ok = tag_stack.size() && tag_stack.front()->get() == tag.substr(1, tag.length());
			if (tag_stack.front()->get() == "b") {
				in_bold = false;
			}
			if (tag_stack.front()->get() == "i") {
				in_italics = false;
			}
			if ((tag_stack.front()->get() == "indent") || (tag_stack.front()->get() == "ol") || (tag_stack.front()->get() == "ul")) {
				indent_level--;
			}
			if (!tag_ok) {
				txt += "[" + tag;
				add_text(txt);
				after_list_open_tag = false;
				after_list_close_tag = false;
				pos = brk_end;
				continue;
			}
			if (txt.is_empty() && after_list_open_tag) {
				txt = "\n"; 
			}