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c++ - Optimization bug in exception handling

#include <stdio.h>

struct A
{ };

int main()
{
  int *i = 0;
  try
  {
    i = new int(0);
    throw A();
  }
  catch (const A &a)
  {
    printf("%d\n", *i);
  }
}


Compiled with optimizations enabled (-o+all), the compiler assumes that i is
still NULL when the exception is caught:

                [...]
                xor     ECX,ECX
                push    dword ptr [ECX]
                push    offset FLAT:_DATA
                call    near ptr _printf
                [...]


Extracted from omniORB (it only occurs when an omniORB application exits
and omniORB tries to clean up...)


bye, Christof

-- 
http://cmeerw.org                                 JID: cmeerw jabber.at
mailto cmeerw at web.de

...and what have you contributed to the Net?
Dec 31 2002