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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3) Gecko/20030312

Description of problem:
Stock RHAS2.1,

binutils-2.11.90.0.8-12
cpp-2.96-116.7.2
gcc-2.96-116.7.2
gcc-c++-2.96-116.7.2
glibc-2.2.4-31.7
glibc-devel-2.2.4-31.7
libstdc++-2.96-116.7.2
libstdc++-devel-2.96-116.7.2

When this code:

// Uncomment any ONE of the ofstream declarations.
// Then compile and run.  With -O it SEGVs, but
// with no -O it runs fine.

#include <fstream>
int main(int argc, char **argv)
{
  std::ofstream xo("bug.out");
  //std::ofstream xo("/dev/stdout");
  //std::ofstream xo("/dev/fd/1");
  //std::ofstream xo(1);
  //std::ofstream xo; xo.attach(1);
  xo << "Hello world." << std::endl;
  return 0;
}

is compiled with -O, the created executable produces Segmentation fault. 
Without -O, the excutable functions normally. 

BTW, it works on a 7.3 system with gcc-2.96-112

Version-Release number of selected component (if applicable):
gcc-2.96-116

How reproducible:
Always

Steps to Reproduce:
1.compile with/without -O
2.run
    

Actual Results:  without -O it works, with it dumps

Expected Results:  should always work

Additional info:

This is critical. We have RHAS support contract, and i am persuing that avenue
as well, but i am not sure where it will lead me.