[php-src] Issue #8084: Calling mysqli_stmt constructor leaks memory

Issue: https://github.com/php/php-src/issues/8084 Author: kamil-tekiela ### Description The following code: ```php <?php $mysqli = new mysqli('localhost', 'user', 'password', 'test'); $stmt = $mysqli->prepare("SELECT 1"); $stmt->__construct($mysqli); ``` Resulted in this output: ``` [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_connection.c(685) : Freeing 0x00007f0ba1c01188 (24 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(349) : Actual location (location was relayed) [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.h(93) : Freeing 0x00007f0ba1c011c0 (23 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(304) : Actual location (location was relayed) Last leak repeated 3 times [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqli/mysqli_api.c(1885) : Freeing 0x00007f0ba1c011f8 (24 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_auth.c(104) : Freeing 0x00007f0ba1c01230 (21 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(94) : Actual location (location was relayed) [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_connection.c(1565) : Freeing 0x00007f0ba1c02780 (56 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(94) : Actual location (location was relayed) [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/Zend/zend_string.h(150) : Freeing 0x00007f0ba1c04870 (40 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php Last leak repeated 3 times [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_connection.c(687) : Freeing 0x00007f0ba1c04a50 (34 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(349) : Actual location (location was relayed) [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_commands.c(641) : Freeing 0x00007f0ba1c5b6c0 (32 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(349) : Actual location (location was relayed) [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_connection.c(1507) : Freeing 0x00007f0ba1c5b780 (30 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(349) : Actual location (location was relayed) [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/Zend/zend_hash.c(172) : Freeing 0x00007f0ba1c6b480 (320 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqli/mysqli_api.c(1833) : Freeing 0x00007f0ba1c780e0 (80 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_driver.c(187) : Freeing 0x00007f0ba1c78150 (72 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(117) : Actual location (location was relayed) [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_statistics.c(218) : Freeing 0x00007f0ba1c79600 (1304 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_driver.c(110) : Freeing 0x00007f0ba1c7c500 (1224 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(136) : Actual location (location was relayed) [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_statistics.c(217) : Freeing 0x00007f0ba1c830f0 (16 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_driver.c(246) : Freeing 0x00007f0ba1c87000 (376 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(136) : Actual location (location was relayed) [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_driver.c(193) : Freeing 0x00007f0ba1c88000 (816 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(117) : Actual location (location was relayed) [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_driver.c(224) : Freeing 0x00007f0ba1c8e140 (272 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(136) : Actual location (location was relayed) [Fri Feb 11 21:38:50 2022] Script: '/mnt/c/wamp64/www/formatter/rubbish.php' /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_driver.c(267) : Freeing 0x00007f0ba1c8e280 (232 bytes), script=/mnt/c/wamp64/www/formatter/rubbish.php /mnt/d/projects/php-src/ext/mysqlnd/mysqlnd_alloc.c(136) : Actual location (location was relayed) === Total 25 memory leaks detected === ``` But I expected this output instead: ``` ``` ### PHP Version PHP 8.0, PHP 8.1, master ### Operating System _No response_