BUG: Filebuf overflow() and underflow() Call filebuf::sync()

RESOLUTION

• Do not define the virtual function sync() in your filebuf-derived class.
  
  -or-
  
  define your own versions of overflow() and underflow() in the derived class.
• Change the filebuf::overflow() and filebuf::underflow() functions to call sync() instead of filebuf::sync(). You can find the source code for filebuf class functions in the following location:

  ...\VC\Src\FileBuf.cpp
  						

  The source code for filebuf::overflow() follows:

        int filebuf::overflow(int c)
        {
            if (allocate()==EOF)
                return EOF;
            if (filebuf::sync()==EOF) // Change to sync() for the workaround.
                return EOF;
  
            if (!unbuffered())
                setp(base(),ebuf());
            if (c!=EOF)
                {
                if ((!unbuffered()) && (pptr() < epptr()))
                    sputc(c);
                else
                    {
                    if (_write(x_fd,&c,1)!=1)
                        return(EOF);
                    }
                }
            return(1);
       }