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

From: Date: Wed, 17 Feb 2016 03:35:25 +0000
Subject: Bug #71152 [Opn->Csd]: mt_rand() returns the different values from original mt19937ar.c
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=71152&edit=1

 ID:                 71152
 Updated by:         laruence@php.net
 Reported by:        kusano4a at gmail dot com
 Summary:            mt_rand() returns the different values from original
                     mt19937ar.c
-Status:             Open
+Status:             Closed
 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:

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


Previous Comments:
------------------------------------------------------------------------
[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



------------------------------------------------------------------------



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