Bug #79038 [NEW]: PDOStatement::nextRowset() leaks column values

From: cmb Operating system: * PHP version: 7.3Git-2019-12-27 (Git) Package: PDO ODBC Bug Type: Bug Bug description:PDOStatement::nextRowset() leaks column values Description: ------------ The basic problem is that PDO core sets the column_count to zero, before the driver specific implementation of next_rowset is called, so the column values are never freed. Since PDO_ODBC does not implement cursor_closer, the memory leak also happens when PDOStatement::closeCursor() called. The leaks can be seen when the PDO_ODBC test suite is run on a debug build on PHP-7.4, and also for PHP-7.3 when run with valgrind or another leak checker. Test script: --------------- php run-tests.php ext/pdo_odbc/tests Expected result: ---------------- no memory leaks Actual result: -------------- <https://ci.appveyor.com/project/php/php-src/builds/29760248/job/qrhd1plp255gxwmy#L4986> -- Edit bug report at https://bugs.php.net/bug.php?id=79038&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=79038&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=79038&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=79038&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=79038&r=needscript Try newer version: https://bugs.php.net/fix.php?id=79038&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=79038&r=support Expected behavior: https://bugs.php.net/fix.php?id=79038&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=79038&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=79038&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=79038&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=79038&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=79038&r=dst IIS Stability: https://bugs.php.net/fix.php?id=79038&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=79038&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=79038&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=79038&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=79038&r=mysqlcfg