src/share/vm/utilities/taskqueue.hpp

*** 329,339 ****
      index = decrement_index(index);
      // tty->print_cr("  doing entry %d," INTPTR_T " -> " INTPTR_T,
      //            index, &_elems[index], _elems[index]);
      E* t = (E*)&_elems[index];      // cast away volatility
      oop* p = (oop*)t;
!     assert((*t)->is_oop_or_null(), "Not an oop or null");
      f->do_oop(p);
    }
    // tty->print_cr("END OopTaskQueue::oops_do");
  }
  
--- 329,339 ----
      index = decrement_index(index);
      // tty->print_cr("  doing entry %d," INTPTR_T " -> " INTPTR_T,
      //            index, &_elems[index], _elems[index]);
      E* t = (E*)&_elems[index];      // cast away volatility
      oop* p = (oop*)t;
!     assert((*t)->is_oop_or_null(), err_msg("Not an oop or null: " PTR_FORMAT, p2i(*t)));
      f->do_oop(p);
    }
    // tty->print_cr("END OopTaskQueue::oops_do");
  }