fixup! Add #[\NoDiscard] attribute

Author: TimWolla

Zend/Optimizer/optimize_func_calls.c

@@ -78,8 +78,10 @@ static void zend_delete_call_instructions(zend_op_array *op_array, zend_op *opli
 
 static void zend_try_inline_call(zend_op_array *op_array, zend_op *fcall, zend_op *opline, zend_function *func)
 {
+	const uint32_t no_discard = RETURN_VALUE_USED(opline) ? 0 : ZEND_ACC_NODISCARD;
+
 	if (func->type == ZEND_USER_FUNCTION
-	 && !(func->op_array.fn_flags & (ZEND_ACC_ABSTRACT|ZEND_ACC_HAS_TYPE_HINTS|ZEND_ACC_DEPRECATED|ZEND_ACC_NODISCARD))
+	 && !(func->op_array.fn_flags & (ZEND_ACC_ABSTRACT|ZEND_ACC_HAS_TYPE_HINTS|ZEND_ACC_DEPRECATED|no_discard))
 		/* TODO: function copied from trait may be inconsistent ??? */
 	 && !(func->op_array.fn_flags & (ZEND_ACC_TRAIT_CLONE))
 	 && fcall->extended_value >= func->op_array.required_num_args