Fixed bug #81494

Use the proper error reporting mechanism rather than throwing a
warning. This requires something of a hack because we don't have
direct access to the connection object at this point.

Author: nikic

NEWS

@@ -2,6 +2,9 @@ PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 ?? ??? ????, PHP 7.4.26
 
+- MySQLi:
+  . Fixed bug #81494 (Stopped unbuffered query does not throw error). (Nikita)
+
 - Streams:
   . Fixed bug #54340 (Memory corruption with user_filter). (Nikita)
 

ext/mysqli/mysqli.c

@@ -1202,6 +1202,17 @@ void php_mysqli_fetch_into_hash_aux(zval *return_value, MYSQL_RES * result, zend
 	}
 #else
 	mysqlnd_fetch_into(result, ((fetchtype & MYSQLI_NUM)? MYSQLND_FETCH_NUM:0) | ((fetchtype & MYSQLI_ASSOC)? MYSQLND_FETCH_ASSOC:0), return_value, MYSQLND_MYSQLI);
+	/* TODO: We don't have access to the connection object at this point, so we use low-level
+	 * mysqlnd APIs to access the error information. We should try to pass through the connection
+	 * object instead. */
+	if (MyG(report_mode) & MYSQLI_REPORT_ERROR) {
+		MYSQLND_CONN_DATA *conn = result->conn;
+		unsigned error_no = conn->m->get_error_no(conn);
+		if (error_no) {
+			php_mysqli_report_error(
+				conn->m->get_sqlstate(conn), error_no, conn->m->get_error_str(conn));
+		}
+	}
 #endif
 }
 /* }}} */

ext/mysqli/tests/bug64726.phpt

@@ -14,10 +14,11 @@ require_once('skipifconnectfailure.inc');
 require 'connect.inc';
 $db = new my_mysqli($host, $user, $passwd, $db, $port, $socket);
 
+mysqli_report(MYSQLI_REPORT_ERROR);
 $result = $db->query('SELECT 1', MYSQLI_USE_RESULT);
 $db->close();
 var_dump($result->fetch_object());
 ?>
 --EXPECTF--
-Warning: mysqli_result::fetch_object(): Error while reading a row in %sbug64726.php on line %d
+Warning: mysqli_result::fetch_object(): (HY000/2014): Commands out of sync; you can't run this command now in %s on line %d
 bool(false)

ext/mysqli/tests/bug79375.phpt

@@ -167,6 +167,4 @@ Lock wait timeout exceeded; try restarting transaction
 Running query on first connection
 Got 1 for first connection
 Running query on second connection
-
-Warning: mysqli_result::fetch_row(): Error while reading a row in %s on line %d
-Got 0 for second connection
+Lock wait timeout exceeded; try restarting transaction

ext/mysqlnd/mysqlnd_result.c

@@ -1753,7 +1753,6 @@ MYSQLND_METHOD(mysqlnd_res, fetch_into)(MYSQLND_RES * result, const unsigned int
 	}
 	array_init_size(return_value, array_size);
 	if (FAIL == result->m.fetch_row(result, (void *)return_value, flags, &fetched_anything)) {
-		php_error_docref(NULL, E_WARNING, "Error while reading a row");
 		zend_array_destroy(Z_ARR_P(return_value));
 		RETVAL_FALSE;
 	} else if (fetched_anything == FALSE) {