### 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.
if (ClassDB::has_signal(p_native_type_string, p_member_name)) {
		return true;
	}
	if (ClassDB::has_property(p_native_type_string, p_member_name)) {
		return true;
	}
	if (ClassDB::has_integer_constant(p_native_type_string, p_member_name)) {
		return true;
	}
	if (p_member_name == CoreStringNames::get_singleton()->_script) {
		return true;
	}
	return false;
}
Error GDScriptAnalyzer::check_native_member_name_conflict(const StringName &p_member_name, const GDScriptParser::Node *p_member_node, const StringName &p_native_type_string) {
	if (has_member_name_conflict_in_native_type(p_member_name, p_native_type_string)) {
		push_error(vformat(R"(Member "%s" redefined (original in native class '%s'))", p_member_name, p_native_type_string), p_member_node);
		return ERR_PARSE_ERROR;
	}
	if (class_exists(p_member_name)) {
		push_error(vformat(R"(The member "%s" shadows a native class.)", p_member_name), p_member_node);
		return ERR_PARSE_ERROR;
	}
	if (GDScriptParser::get_builtin_type(p_member_name) != Variant::VARIANT_MAX) {
		push_error(vformat(R"(The member "%s" cannot have the same name as a builtin type.)", p_member_name), p_member_node);
		return ERR_PARSE_ERROR;
	}
	return OK;
}
Error GDScriptAnalyzer::check_class_member_name_conflict(const GDScriptParser::ClassNode *p_class_node, const StringName &p_member_name, const GDScriptParser::Node *p_member_node) {