Bug #79947 [NEW]: Memory leak in zend_hash

From: changochen1 at gmail dot com Operating system: PHP version: 8.0Git-2020-08-09 (Git) Package: Scripting Engine problem Bug Type: Bug Bug description:Memory leak in zend_hash Description: ------------ We found a bug that leads to memory leak in php interpreter. Here's the log: --- ~/php-src/bld/sapi/cli/php -f php_poc41.php Warning: Undefined variable $b in /home/yongheng/php_commit/php_poc41.php on line 4 Fatal error: Uncaught TypeError: Illegal offset type in /home/yongheng/php_commit/php_poc41.php:4 Stack trace: #0 {main} thrown in /home/yongheng/php_commit/php_poc41.php on line 4 [Sun Aug 9 17:17:48 2020] Script: '/home/yongheng/php_commit/php_poc41.php' /home/yongheng/php-src/Zend/zend_hash.c(278) : Freeing 0x00007fddefa58540 (56 bytes), script=/home/yongheng/php_commit/php_poc41.php [Sun Aug 9 17:17:48 2020] Script: '/home/yongheng/php_commit/php_poc41.php' /home/yongheng/php-src/Zend/zend_hash.c(153) : Freeing 0x00007fddefa5c3c0 (264 bytes), script=/home/yongheng/php_commit/php_poc41.php === Total 2 memory leaks detected === --- Test script: --------------- <? $a = array () ; try { $b [ $a ] -= array ( $a ) ; } catch ( c ) { } -- Edit bug report at https://bugs.php.net/bug.php?id=79947&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=79947&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=79947&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=79947&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=79947&r=needscript Try newer version: https://bugs.php.net/fix.php?id=79947&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=79947&r=support Expected behavior: https://bugs.php.net/fix.php?id=79947&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=79947&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=79947&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=79947&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=79947&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=79947&r=dst IIS Stability: https://bugs.php.net/fix.php?id=79947&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=79947&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=79947&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=79947&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=79947&r=mysqlcfg