Bug #80745 [NEW]: JIT produces Assert failure and UNKNOWN:0 var_dumps in code involving bitshifts

From: dktapps at pmmp dot io Operating system: Linux PHP version: 8.0.2 Package: JIT Bug Type: Bug Bug description:JIT produces Assert failure and UNKNOWN:0 var_dumps in code involving bitshifts Description: ------------ The following code crashes with PHP 8.0.2 ZTS DEBUG when opcache is enabled using opcache.jit=1205. This happens on both Windows and Linux. Test script: --------------- <?php final class Message { public $qr = false; public $opcode = 0; public $aa = false; } echo "Starting...\n"; function headerToBinary(Message $message) { $flags = 0; $flags = ($flags << 1) | ($message->qr ? 1 : 0); $flags = ($flags << 4) | $message->opcode; var_dump($flags); $flags = ($flags << 1) | ($message->aa ? 1 : 0); } headerToBinary(new Message()); echo "PROBLEM NOT REPRODUCED !\n"; Expected result: ---------------- Starting... int(0) PROBLEM NOT REPRODUCED ! Actual result: -------------- In release mode --------------- Starting... UNKNOWN:0 PHP Fatal error: Uncaught TypeError: Unsupported operand types: null << int in /home/runner/work/php-8-jit-bug-1/php-8-jit-bug-1/reproduce.php:20 Stack trace: #0 /home/runner/work/php-8-jit-bug-1/php-8-jit-bug-1/reproduce.php(23): headerToBinary() #1 {main} thrown in /home/runner/work/php-8-jit-bug-1/php-8-jit-bug-1/reproduce.php on line 20 In debug mode ------------- Starting... UNKNOWN:0 php: /tmp/php-build/source/8.0.2/Zend/zend_operators.c:345: zendi_try_get_long: Assertion `0' failed. Aborted (core dumped) -- Edit bug report at https://bugs.php.net/bug.php?id=80745&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80745&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80745&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80745&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80745&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80745&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80745&r=support Expected behavior: https://bugs.php.net/fix.php?id=80745&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80745&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80745&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80745&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80745&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80745&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80745&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80745&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80745&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80745&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80745&r=mysqlcfg