Bug #80839 [NEW]: PHP problem with JIT

From: gfpuba+phpbug at gmail dot com Operating system: Windows 10 PHP version: 8.0Git-2021-03-06 (Git) Package: JIT Bug Type: Bug Bug description:PHP problem with JIT Description: ------------ Running this program results in invalid data. May also causes PHP to crash. Works fine without JIT. The problem has been narrowed as best as I can. The original problem was a PHP crash using JIT in a much larger application. Fails the same in Apache 2.4 or CLI (both 64bits) Test script: --------------- <?php $a = null; // the problem only occurs when set to NULL test($a, 'y'); function test($str, $pad) { $x = $str . str_repeat($pad, 15); // $x now contains "yyyyyyyyyyyyyyy" var_dump($x); echo '<br/>'; $gft = new gft(); $gft->info(33); // $x has been changed ???? // $x contains what was echoed in the function 'info' var_dump($x); echo '<br/>'; } class gft{ private $strVal = 'abcd '; public function info($info, $prefix = ' Info:'){ echo $this->strVal.$prefix.serialize($info).'aaaa'; echo '<br/>'; } } Expected result: ---------------- string(15) "yyyyyyyyyyyyyyy" xxxx Info:i:33;aaaa string(15) "yyyyyyyyyyyyyyy" Actual result: -------------- string(15) "yyyyyyyyyyyyyyy" xxxx Info:i:33;aaaa string(19) "xxxx Info:i:33;aaaa" -- Edit bug report at https://bugs.php.net/bug.php?id=80839&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80839&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80839&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80839&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80839&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80839&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80839&r=support Expected behavior: https://bugs.php.net/fix.php?id=80839&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80839&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80839&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80839&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80839&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80839&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80839&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80839&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80839&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80839&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80839&r=mysqlcfg