#27608 [Opn->Csd]: mysql_free_result causes segfault with invalid result and exceptionerrorhandler

ID: 27608 Updated by: iliaa@php.net Reported By: david dot danier at team23 dot de -Status: Open +Status: Closed Bug Type: MySQL related Operating System: Gentoo Linux 1.4 PHP Version: 5CVS-2004-03-15 (dev) New Comment: This bug has been fixed in CVS. Snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. Thank you for the report, and for helping us make PHP better. No longer crashes with latest CVS. Previous Comments: ------------------------------------------------------------------------ [2004-03-15 12:32:21] david dot danier at team23 dot de Description: ------------ We have a class that catches the result of mysql_query (this here in the example is minimal). In the __descruct()-method it should do an mysql_free_result(). The errorhandler throws an exception. Now, if we do an INSERT the mysql_free_result()-function gives an error (it MUST give an error, because mysql_query() gives us no valid result if we use INSERT), this error is passed to error() whith should throw an exception. But it creates a segmentation fault. :-( Other exceptions thrown by the error()-function are working perfectly. SELECT-statements are working. (like they should do) PHP-Version: CVS 2004-03-07 (reproduced with CVS 2004-03-15) Configured with (taken from the PHP4-ebuild, but modified): ./configure --prefix=/usr --host=i686-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --with-apxs2=/usr/sbin/apxs2 --with-ndbm=/usr --with-db4=/usr --with-mcrypt=/usr --with-mhash=/usr --without-interbase --without-ming --without-swf --without-sybase --with-gdbm=/usr --with-java=/opt/blackdown-jdk-1.4.1 --without-mcal --without-unixODBC --without-pgsql --without-snmp --with-xpm-dir=/usr/X11R6 --with-pdflib=/usr --with-gd --enable-gd-native-ttf --with-png=/usr --with-png-dir=/usr --with-jpeg=/usr --with-jpeg-dir=/usr --enable-exif --with-tiff=/usr --with-tiff-dir=/usr --with-mysql=/usr --with-mysql-sock=/var/run/mysqld/mysqld.sock --with-freetype-dir=/usr --with-ttf=/usr --with-t1lib=/usr --with-gettext --with-qtdom=/usr/qt/3 --with-pspell=/usr --with-openssl=/usr --with-imap=/usr --without-ldap --with-dom=/usr --with-dom-xslt=/usr --with-dom-exslt=/usr --without-kerberos --with-pam --disable-memory-limit --disable-ipv6 --without-yaz --without-curl --enable-dbx --with-imap-ssl --with-zlib=/usr --with-zlib-dir=/usr --with-sablot=/usr --enable-xslt --with-xslt-sablot --with-xmlrpc --enable-wddx --with-xml --enable-mbstring=all --enable-mbregex --with-bz2=/usr --with-crack=/usr --with-cdb --enable-pcntl --enable-bcmath --enable-calendar --enable-dbase --enable-filepro --enable-ftp --with-mime-magic --enable-sockets --enable-sysvsem --enable-sysvshm --enable-sysvipc --with-iconv --enable-shmop --enable-dio --enable-yp --without-ncurses --without-readline --enable-inline-optimization --enable-track-vars --enable-trans-sid --enable-versioning --with-config-file-path=/etc/php/apache2-php5 php.ini: not changed Reproduce code: --------------- <?php class result { var $result; public function __construct($result) { if (!$result) { die(mysql_error()); } echo 'GO '; $this->result = $result; } public function __destruct() { echo 'OK '; mysql_free_result($this->result); } } function error($errno, $errstr, $errfile, $errline) { throw new Exception(); } set_error_handler('error', E_ALL); $db = mysql_connect('localhost', 'default'); mysql_select_db('test', $db); echo '1 '; // only to get the position the error happens $test = new result(mysql_query('INSERT INTO blafasl SET text="segfault!"', $db)); echo '2 '; unset($test); // if we don't unset $test PHP gives an exception error echo '3 '; ?> Expected result: ---------------- Errormessage about uncought exception..... Actual result: -------------- (gdb) bt #0 0x082814dc in _zval_ptr_dtor (zval_ptr=0xbfffd40c) at /home/goliath/downloads/php/php-src/Zend/zend_execute_API.c:356 #1 0x0828c148 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/goliath/downloads/php/php-src/Zend/zend.c:1082 #2 0x08252b5f in php_execute_script (primary_file=0xbffff760) at /home/goliath/downloads/php/php-src/main/main.c:1655 #3 0x082b728c in main (argc=2, argv=0xbffff7e4) at /home/goliath/downloads/php/php-src/sapi/cli/php_cli.c:943 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=27608&edit=1