[jira] Updated: (STDCXX-646) [MSVC] rw_putenv() limitations

["Farid Zaripov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/STDCXX-646?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Farid Zaripov updated STDCXX-646:
---------------------------------

    Remaining Estimate: 2h  (was: 0h)

> [MSVC] rw_putenv() limitations
> ------------------------------
>
>                 Key: STDCXX-646
>                 URL: https://issues.apache.org/jira/browse/STDCXX-646
>             Project: C++ Standard Library
>          Issue Type: Bug
>          Components: Test Driver
>    Affects Versions: 4.2.0
>         Environment: MSVC, ICC/Windows
>            Reporter: Farid Zaripov
>            Assignee: Farid Zaripov
>             Fix For: 4.2.1
>
>         Attachments: environ.cpp.diff, stdcxx-646.patch
>
>          Time Spent: 6.07h
>  Remaining Estimate: 2h
>
> In 0.printf.cpp test the rw_putenv() is used to define variable to null and to undefine variable.
> ---------------
> 1.    rw_putenv ("NULL=");   // define to null (empty string)
> 2.    rw_putenv ("UNSET");   // undefine if defined
> ---------------
>   But on MSVC putenv() could not define variable to null, so:
> 1. rw_putenv ("NULL="); undefines the NULL variable instead defining it to null;
> 2. rw_putenv ("UNSET"); does nothing instead of undefining variable

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