Bug #77857 [Opn->Csd]: Wrong result if executed with JIT

Edit report at https://bugs.php.net/bug.php?id=77857&edit=1 ID: 77857 Updated by: laruence@php.net Reported by: uchiyama@php.net Summary: Wrong result if executed with JIT -Status: Open +Status: Closed Type: Bug Package: opcache Operating System: CentOS 7 PHP Version: master-Git-2019-04-06 (Git) Block user comment: N Private report: N New Comment: Automatic comment on behalf of laruence@gmail.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=c9fefb31fd06ed2b07345d1c1e9d00dd492399f2 Log: Fixed bug #77857 (Wrong result if executed with JIT) Previous Comments: ------------------------------------------------------------------------ [2019-04-08 08:49:52] nikic@php.net I can't reproduce this. ------------------------------------------------------------------------ [2019-04-06 04:31:06] uchiyama@php.net 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 this bug report at https://bugs.php.net/bug.php?id=77857&edit=1