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https://issues.apache.org/jira/browse/MATH-1020?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gilles resolved MATH-1020.
--------------------------

    Resolution: Fixed
    
> "nextPermutation" method broken (in class 
> "o.a.c.m.random.RandomDataGenerator")
> -------------------------------------------------------------------------------
>
>                 Key: MATH-1020
>                 URL: https://issues.apache.org/jira/browse/MATH-1020
>             Project: Commons Math
>          Issue Type: Bug
>            Reporter: Gilles
>             Fix For: 3.3
>
>         Attachments: MATH-1020.patch
>
>
> Correct behaviour of this method relied on the [broken behaviour of 
> "shuffle"|MATH-1019].
> With a fixed "shuffle", the "nextSample()" unit test caught the bug in this 
> method.

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