[Bug libstdc++/29286] [4.0/4.1/4.2 Regression] placement new does not change the dynamic type as it should

["pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #13 from pinskia at gcc dot gnu dot org  2006-09-29 16:58 -------
And here is a testcase that fails also for 4.0.0 and self contained also:
#include <new>
int foo(int n, int *f, long *f1)
{
  long t = 0;
  *f = 1;
  long *fp = new(f) long;
  *fp = 1;
  for (int i=0; i<n; ++i)
    {
      t += *fp;
      int *b = new (f) int;
      *b = i + *f1;
      fp = new (f) long;
      *fp = t*t;
    }
  t+=*fp;
  return t+*f1;
}

extern "C" void abort ();

int main(void)
{
  if (sizeof(int) != sizeof(long)
    return 0;
  int *a = new int;
  long *b = new long;
  if (foo(2, a, b) != 6)
    abort ();
  return 0;
}


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |4.0.0 4.1.0 4.2.0
      Known to work|4.1.1                       |3.4.0
            Summary|[4.2 Regression] placement  |[4.0/4.1/4.2 Regression]
                   |new does not change the     |placement new does not
                   |dynamic type as it should   |change the dynamic type as
                   |                            |it should


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29286