[jira] Commented: (STDCXX-635) std::deque::swap invalidates begin() and end() iterators on empty container

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

    [ https://issues.apache.org/jira/browse/STDCXX-635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12579121#action_12579121 ] 

Farid Zaripov commented on STDCXX-635:
--------------------------------------

See the discussion: http://www.mail-archive.com/stdcxx-dev@incubator.apache.org/msg03868.html

> std::deque::swap invalidates begin() and end() iterators on empty container
> ---------------------------------------------------------------------------
>
>                 Key: STDCXX-635
>                 URL: https://issues.apache.org/jira/browse/STDCXX-635
>             Project: C++ Standard Library
>          Issue Type: Bug
>          Components: 23. Containers
>    Affects Versions: 4.2.0
>         Environment: All
>            Reporter: Farid Zaripov
>            Priority: Minor
>             Fix For: 4.2.1
>
>
> The program below aborts on assert.
> #include <deque>
> #include <cassert>
> int main ()
> {
>     typedef std::deque<int> Deque;
>     typedef Deque::iterator Iter;
>     Deque d1, d2;
>     Iter iters [2][2] = {
>         { d1.begin (), d1.end () },
>         { d2.begin (), d2.end () }
>     };
>     d1.swap (d2);
>     assert (d2.begin () == iters [0][0]);
>     assert (d2.end ()== iters [0][1]);
>     assert (d1.begin () == iters [1][0]);
>     assert (d1.end ()== iters [1][1]);
>     return 0;
> }

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