### Godot version

Beta 17, master

### System information

Windows 11

### Issue description

Godot gets a hard crash while attempting to code-complete for member `const` of a class.

### Steps to reproduce

```GDScript
enum E { V1 }

const e := E
```

And then type a `.` after the last `E`, which triggers code hints/auto-completion for subscripts based on `E` and causes a hard crash.

Does not happen for `var e := E.V1`.

### Minimal reproduction project

See above.
resolve_class_interface(p_class);
	if (p_recursive) {
		for (int i = 0; i < p_class->members.size(); i++) {
			GDScriptParser::ClassNode::Member member = p_class->members[i];
			if (member.type == GDScriptParser::ClassNode::Member::CLASS) {
				resolve_class_interface(member.m_class, true);
			}
		}
	}
}
void GDScriptAnalyzer::resolve_class_body(GDScriptParser::ClassNode *p_class, const GDScriptParser::Node *p_source) {
	if (p_source == nullptr && parser->has_class(p_class)) {
		p_source = p_class;
	}
	if (p_class->resolved_body) {
		return;
	}
	if (!parser->has_class(p_class)) {
		String script_path = p_class->get_datatype().script_path;
		Ref<GDScriptParserRef> parser_ref = get_parser_for(script_path);
		if (parser_ref.is_null()) {
			push_error(vformat(R"(Could not find script "%s".)", script_path), p_source);
			return;
		}
		Error err = parser_ref->raise_status(GDScriptParserRef::PARSED);
		if (err) {