Bug #77857 [NEW]: Wrong result if executed with JIT

From: uchiyama Operating system: CentOS 7 PHP version: master-Git-2019-04-06 (Git) Package: opcache Bug Type: Bug Bug description:Wrong result if executed with JIT Description: ------------ The test script ends with a wrong result if JIT is enabled as follows: $ ./sapi/cli/php -n -derror_reporting=-1 -dzend_extension=pwd/modules/opcache.so -dopcache.enable_cli=1 -dopcache.jit_buffer_size=32M Test.php Note: without JIT (i.e. remove -dopcache.jit_buffer_size=32M), it ends with the expected result. // System info $ cat /proc/cpuinfo | grep '^model name' model name : Intel(R) Core(TM) i5-3337U CPU @ 1.80GHz $ cat /etc/redhat-release CentOS Linux release 7.6.1810 (Core) // Commit id $ git log --oneline -n1 7b58e43 Merge branch 'PHP-7.4' Test script: --------------- <?php function test() { $arr = array_fill(0, 1, 1.0); $y = 0.0; foreach ($arr as $v) { $tmp = 1.0 * $v; var_dump($tmp); $y += $tmp / 1.0; } return $y; } var_dump(test()); Expected result: ---------------- float(1) float(1) Actual result: -------------- float(255814795264) Notice: Undefined variable: tmp in /.../Test.php on line 8 float(0) // the value in the first line ($tmp) is changed arbitrary by each execution. -- Edit bug report at https://bugs.php.net/bug.php?id=77857&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77857&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77857&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77857&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77857&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77857&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77857&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77857&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77857&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77857&r=support Expected behavior: https://bugs.php.net/fix.php?id=77857&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77857&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77857&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77857&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77857&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77857&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77857&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77857&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77857&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77857&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77857&r=mysqlcfg