heap corruption

would this cause heap corruption?

int main()
{
   char *s = new char[4];
   delete &s[0];
   delete [] s;
   return 0;
}

Now if you did a

int main()
{
   char *s = new char[4];
   memcpy(s,"deadbeef",sizeof(char) * 8);
   delete s;
   return 0;
}

You'd get something a bit more fun (probably a write AV)

int main()
{
   char *s = new char[4];
   char *t = new char[10];
   memcpy(s,"deadbeef",sizeof(char) * 8);
   delete s;
   return 0;
}

This'll probably give you some heap corruption.