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From "Martin Sebor (JIRA)" <j...@apache.org>
Subject [jira] Created: (STDCXX-204) std::filebuf::overflow(EOF) writes garbage in unbuffered mode
Date Wed, 21 Jun 2006 01:17:29 GMT
std::filebuf::overflow(EOF) writes garbage in unbuffered mode
-------------------------------------------------------------

         Key: STDCXX-204
         URL: http://issues.apache.org/jira/browse/STDCXX-204
     Project: C++ Standard Library
        Type: Bug

  Components: 27. Input/Output  
    Versions: 4.1.2, 4.1.3    
 Environment: All.
    Reporter: Martin Sebor
 Assigned to: Martin Sebor 
     Fix For: 4.2


The program below dumps core:

$ cat t.cpp && nice gmake t && ./t
#include <cassert>
#include <fstream>

struct MyBuf: std::filebuf {
    int_type oflow () {
         return overflow (traits_type::eof ());
    }
};

int main ()
{
    MyBuf f;

    assert (0 != f.open ("test.file", std::ios::out | std::ios::trunc));
    assert (0 != f.pubsetbuf (0, 0));

    assert (MyBuf::traits_type::eof () != f.oflow ());

    assert (0 == f.pubseekoff (0, std::ios::end, std::ios::out));
}
aCC -c -I/amd/devco/sebor/dev/stdlib/include/ansi -I/usr/include  -D_RWSTDDEBUG   -mt -D_RWSTD_USE_CONFIG
-I/amd/devco/sebor/dev/stdlib/include -I/build/sebor/aCC-3.63-15S/include -I/amd/devco/sebor/dev/stdlib/../rwtest
-I/amd/devco/sebor/dev/stdlib/../rwtest/include -I/amd/devco/sebor/dev/stdlib/tests/include
 -Aa +nostl  -g +d  +DD64 +w +W392 +W655 +W684 +W818 +W819 +W849  t.cpp
aCC t.o -o t -L/build/sebor/aCC-3.63-15S/rwtest -lrwtest15S -Aa +nostl -Wl,+s -Wl,+vnocompatwarnings
-L/build/sebor/aCC-3.63-15S/lib   -mt +DD64 -L/build/sebor/aCC-3.63-15S/lib -lstd15S   -lm
Assertion failed: 0 == f.pubseekoff (0, std::ios::end, std::ios::out), file t.cpp, line 19
ABORT instruction (core dumped)


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