Bug #71152 [Csd->ReO]: mt_rand() returns the different values from original mt19937ar.c

Edit report at https://bugs.php.net/bug.php?id=71152&edit=1 ID: 71152 Updated by: ab@php.net Reported by: kusano4a at gmail dot com Summary: mt_rand() returns the different values from original mt19937ar.c -Status: Closed +Status: Re-Opened Type: Bug Package: *Math Functions Operating System: All PHP Version: master-Git-2015-12-17 (Git) Block user comment: N Private report: N New Comment: Reopen as the patch is reverted. Thanks. Previous Comments: ------------------------------------------------------------------------ [2016-02-18 11:26:02] leigh@php.net Automatic comment on behalf of leigh Revision: http://git.php.net/?p=php-src.git;a=commit;h=a0724d30817600540946b41e40f4cfc2a0c30f80 Log: Revert &quot;Fix #71152: mt_rand() returns the different values from original mt19937ar.c&quot; ------------------------------------------------------------------------ [2016-02-18 11:13:12] leigh@php.net Automatic comment on behalf of leigh Revision: http://git.php.net/?p=php-src.git;a=commit;h=a0724d30817600540946b41e40f4cfc2a0c30f80 Log: Revert &quot;Fix #71152: mt_rand() returns the different values from original mt19937ar.c&quot; ------------------------------------------------------------------------ [2016-02-17 03:35:26] laruence@php.net Automatic comment on behalf of kusano@users.noreply.github.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=d31e8a9a85efea54db0b647424f6c4485d71db8b Log: Fix #71152: mt_rand() returns the different values from original mt19937ar.c ------------------------------------------------------------------------ [2016-02-17 03:35:23] laruence@php.net Automatic comment on behalf of kusano@users.noreply.github.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=6f6bd8ce531636134efd5f669a4e8373fb2e9e51 Log: Fix #71152: mt_rand() returns the different values from original mt19937ar.c ------------------------------------------------------------------------ [2015-12-17 19:13:25] kusano4a at gmail dot com Description: ------------ mt_rand() returns the different values from original mt19937ar.c. Although mt_rand() is required to be generate random numbers, I am concerned about that this difference implies possibly deterioration of randomness quality. Test script: --------------- <?php mt_srand(12345678); for ($i=0; $i<10; $i++) echo mt_rand().PHP_EOL; Expected result: ---------------- 527860569 1711027313 1280820687 688176834 770499160 412773096 813703253 898651287 52508912 757323740 Actual result: -------------- 1614640687 1711027313 857485497 688176834 1386682158 412773096 813703253 898651287 2087374214 1382556330 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=71152&edit=1