Fix update constant of attribute value

Author: nikic

ext/reflection/php_reflection.c

@@ -6410,15 +6410,12 @@ ZEND_METHOD(ReflectionAttribute, getName)
 
 static zend_always_inline int import_attribute_value(zval *ret, zval *val, zend_class_entry *scope) /* {{{ */
 {
+	ZVAL_COPY_OR_DUP(ret, val);
 	if (Z_TYPE_P(val) == IS_CONSTANT_AST) {
-		*ret = *val;
-		//ZVAL_COPY(ret, val);
-
 		if (FAILURE == zval_update_constant_ex(ret, scope)) {
+			zval_ptr_dtor(ret);
 			return FAILURE;
 		}
-	} else {
-		ZVAL_COPY_OR_DUP(ret, val);
 	}
 
 	return SUCCESS;