Bug #73879 [Opn->Fbk]: USE_ZEND_ALLOC=0 PDOStatement exits with "Out of memory" for empty results

Edit report at https://bugs.php.net/bug.php?id=73879&edit=1 ID: 73879 Updated by: ab@php.net Reported by: c dot schiffler at cyberspectrum dot de Summary: USE_ZEND_ALLOC=0 PDOStatement exits with "Out of memory" for empty results -Status: Open +Status: Feedback Type: Bug Package: PDO MySQL Operating System: Debian testing PHP Version: 7.0.14 Block user comment: N Private report: N New Comment: Thanks for the report. Please either use Opcache or Xdebug, not both together. Best is probably even to unload both, depending on what exactly you're debugging. Thanks. Previous Comments: ------------------------------------------------------------------------ [2017-01-06 11:03:07] c dot schiffler at cyberspectrum dot de Description: ------------ I am using USE_ZEND_ALLOC=0 for debugging PDO This bug somewhat relates to https://bugs.php.net/bug.php?id=73370, however it is pretty severe as it makes PDO unusable with "USE_ZEND_ALLOC=0". PDOStatement exits the PHP process with "Out of memory" when executing ANY query that returns an empty result set. No exception, warning or anything else is raised. Calling the same script with "USE_ZEND_ALLOC=1" fixes the problem but is not intended as it prevents to debug PDO without memory manager. System environment: $ php -v PHP 7.0.14-2 (cli) ( NTS ) Copyright (c) 1997-2016 The PHP Group Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies with Zend OPcache v7.0.14-2, Copyright (c) 1999-2016, by Zend Technologies with Xdebug v2.5.0, Copyright (c) 2002-2016, by Derick Rethans Test script: --------------- $dbh = new \PDO('mysql:dbname=test;host=localhost', 'test', 'test'); $dbh->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION); $stmt = $dbh->prepare('SELECT * FROM test WHERE 1=2'); $stmt->execute(); Expected result: ---------------- The execute method should return true as the query is valid and has correctly been processed by MySQL. Actual result: -------------- The PHP process writes "Out of memory" to STDERR and exits with status 1 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=73879&edit=1