### 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 (!left_type.is_set() || !right_type.is_set()) {
		return;
	}
#ifdef DEBUG_ENABLED
	if (p_binary_op->variant_op == Variant::OP_DIVIDE && left_type.builtin_type == Variant::INT && right_type.builtin_type == Variant::INT) {
		parser->push_warning(p_binary_op, GDScriptWarning::INTEGER_DIVISION);
	}
#endif
	if (p_binary_op->left_operand->is_constant && p_binary_op->right_operand->is_constant) {
		p_binary_op->is_constant = true;
		if (p_binary_op->variant_op < Variant::OP_MAX) {
			bool valid = false;
			Variant::evaluate(p_binary_op->variant_op, p_binary_op->left_operand->reduced_value, p_binary_op->right_operand->reduced_value, p_binary_op->reduced_value, valid);
			if (!valid) {
				if (p_binary_op->reduced_value.get_type() == Variant::STRING) {
					push_error(vformat(R"(%s in operator %s.)", p_binary_op->reduced_value, Variant::get_operator_name(p_binary_op->variant_op)), p_binary_op);
				} else {
					push_error(vformat(R"(Invalid operands to operator %s, %s and %s.)",
									   Variant::get_operator_name(p_binary_op->variant_op),
									   Variant::get_type_name(p_binary_op->left_operand->reduced_value.get_type()),
									   Variant::get_type_name(p_binary_op->right_operand->reduced_value.get_type())),
							p_binary_op);
				}
			}
		} else {
			if (p_binary_op->operation == GDScriptParser::BinaryOpNode::OP_TYPE_TEST) {
				GDScriptParser::DataType test_type = right_type;
				test_type.is_meta_type = false;
				if (!is_type_compatible(test_type, left_type)) {