Bug #54986 [Fbk]: Segmentation fault while executing queries with just one column

Edit report at http://bugs.php.net/bug.php?id=54986&edit=1 ID: 54986 Updated by: felipe@php.net Reported by: chandra dot madathil at theice dot com Summary: Segmentation fault while executing queries with just one column Status: Feedback Type: Bug Package: ODBC related Operating System: Red Hat Linux 5.5,64-bit PHP Version: 5.2.17 Block user comment: N Private report: N New Comment: Instructions at http://bugs.php.net/bugs-getting-valgrind-log.php Previous Comments: ------------------------------------------------------------------------ [2011-06-11 04:04:05] felipe@php.net Can you run the test on cli using valgrind? If yes, please post the valgrind log. ------------------------------------------------------------------------ [2011-06-06 17:15:01] chandra dot madathil at theice dot com Looks like this error is more widespread than I thought of initially. I am getting this error while freeing the resultset for some other programs too. Were you able to reproduce this issue? Our production server migration is delayed due to this issue. ------------------------------------------------------------------------ [2011-06-03 16:49:21] chandra dot madathil at theice dot com Description: ------------ When the select statement includes only one column, the script crashes with "zend_mm_heap corrupted" or segmentation fault errors. When we add a dummy column to the select statement, the script runs successfully. Looks like some data structure initialization bug. For example, select name0 from COMPANY where name0 like 'A%'; -- errors out select name0,1 from COMPANY where name0 like 'A%'; -- runs successfully Test script: --------------- <?php $db_conn = odbc_connect('NZSQL','<username>','<password>') or alert("Could not connect: " . odbc_error()); echo "Connected successfully!\n"; $query="select name0 from COMPANY where name0 like 'A%' "; echo "executing ...\n"; $result = odbc_exec($db_conn,$query); echo "executed query ...\n"; if (!$result) alert("Could not run query: " . odbc_error()); echo "fetching resultset ...\n"; while(odbc_fetch_array($result)) { $row0 = odbc_result($result, 1); echo "field1:$row0\n"; } odbc_close($db_conn); echo "Completed successfully\n"; function alert($errMsg) { fwrite(STDERR, "$errMsg\n"); exit(2); } ?> Expected result: ---------------- Connected successfully! executing ... executed query ... fetching resultset ... field1:<company names> .... Completed successfully Actual result: -------------- Connected successfully! executing ... zend_mm_heap corrupted ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=54986&edit=1