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From "Farid Zaripov (JIRA)" <j...@apache.org>
Subject [jira] Created: (STDCXX-515) std::basic_streambuf<>::xsputn() writes characters at the end, but not at the current position if reallocation of internal buffer occurs
Date Thu, 09 Aug 2007 16:37:45 GMT
std::basic_streambuf<>::xsputn() writes characters at the end, but not at the current
position if reallocation of internal buffer occurs
----------------------------------------------------------------------------------------------------------------------------------------

                 Key: STDCXX-515
                 URL: https://issues.apache.org/jira/browse/STDCXX-515
             Project: C++ Standard Library
          Issue Type: Bug
          Components: 27. Input/Output
    Affects Versions: 4.1.3
         Environment: All
            Reporter: Farid Zaripov
            Assignee: Farid Zaripov
             Fix For: 4.2


The test below asserts on i == 512.

test.cpp:
------------------
#include <sstream>
#include <string>
#include <cassert>

int main ()
{
    for (size_t i = 1; i <= 1024; ++i) {
        std::stringstream strm;
        std::string s (i, 'a');
        strm << s;
        strm.seekp (-1, std::ios::cur);
        s.erase (0, 1);
        strm << "bc";
        s.append ("bc");
        assert (strm.str () == s);
    }

    return 0;
}
------------------

The test output:
------------------
test: test.cpp:15: int main (): Assertion `strm.str () == s' failed.
Aborted
------------------


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