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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040625

Description of problem:
This simple program compiled by g++ failed to run no matter
/tmp/test.txt exits or not. I always get 'Error opening file'

#include <iostream>
#include <fstream>

using namespace std;

int main () {

  std::ios::sync_with_stdio(false);

  fstream filestr("/tmp/test.txt", ios::in|ios::out|ios::app);

  if (filestr.is_open())
  {
    cout << "File successfully open" << endl;
    filestr << "Help wanted!" << endl;
    filestr.close();
  }
  else
  {
    cerr << "Error opening file" << endl;
  }

  return 0;
}

I tried to use g++33 and g++35. Didn't work either.

But this same program compiled by Intel C++ compile 8.0 works. It also
works in Windows when compiled by Visual.NET compiler.

I also tried the same program on Redhat Linux 9.0, didn't work either.

Version-Release number of selected component (if applicable):
gcc-c++-3.4.1-4

How reproducible:
Always

Steps to Reproduce:
1. Open an editor and type in the program and save it to test.cpp
2. g++ test.cpp
3. ./a.out
    

Actual Results:  I always get 'Error opening file' message. And the
file is either intact or not created. 

Expected Results:  Although I should get 'File successfully open', and
a file should be created if it doesn't exist and a sentence 'Help
Wanted' should be appended to the end of file.

Additional info: