Bug #80802 [NEW]: zend_jit_fetch_indirect_var assert failure with tracing JIT

From: dktapps at pmmp dot io Operating system: Linux PHP version: 8.0Git-2021-02-25 (Git) Package: JIT Bug Type: Bug Bug description:zend_jit_fetch_indirect_var assert failure with tracing JIT Description: ------------ In code involving inherited static properties, an assert failure may be triggered in the JIT. This is reproducible on 8.0.3RC1 and PHP-8.0 branch as of 2020-02-25, with a build using `--disable-all --enable-cli --enable-debug --enable-opcache --enable-opcache-jit`. Run the below script with the following INI settings opcache.jit=tracing opcache.jit_buffer_size=1M opcache.enable_cli=1 Test script: --------------- <?php abstract class AsyncTask{ private static $threadLocalStorage = null; protected function storeLocal(string $key, $complexData) : void{ if(self::$threadLocalStorage === null){ self::$threadLocalStorage = new \ArrayObject(); } self::$threadLocalStorage[spl_object_id($this)][$key] = $complexData; } final public function __destruct(){ $this->reallyDestruct(); if(self::$threadLocalStorage !== null and isset(self::$threadLocalStorage[$h = spl_object_id($this)])){ unset(self::$threadLocalStorage[$h]); if(self::$threadLocalStorage->count() === 0){ self::$threadLocalStorage = null; } } } protected function reallyDestruct() : void{ } } class Task extends AsyncTask{ public function __construct(){ $this->storeLocal("thing1", new stdClass); } } for($i = 0; $i < 10000; ++$i){ new Task; } echo "OK\n"; Expected result: ---------------- OK Actual result: -------------- Using php-src@8813f2e0c31a98828cac4570673ccd8ce79b00af: php: /home/user/php-src-8.0/ext/opcache/jit/zend_jit_x86.dasc:15224: zend_jit_fetch_indirect_var: Assertion `var_info & (1 << var_type)' failed. Aborted (core dumped) -- Edit bug report at https://bugs.php.net/bug.php?id=80802&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80802&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80802&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80802&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80802&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80802&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80802&r=support Expected behavior: https://bugs.php.net/fix.php?id=80802&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80802&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80802&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80802&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80802&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80802&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80802&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80802&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80802&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80802&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80802&r=mysqlcfg