p := s.base() + uintptr(special.offset)
					siter.unlinkAndNext()
					freeSpecial(special, unsafe.Pointer(p), size)
				}
			}
		} else {
			// object is still live
			if siter.s.kind == _KindSpecialReachable {
				special := siter.unlinkAndNext()
				(*specialReachable)(unsafe.Pointer(special)).reachable = true
				freeSpecial(special, unsafe.Pointer(p), size)
			} else {
				// keep special record

func (i *specialsIter) unlinkAndNext() *special {
	cur := i.s
	i.s = cur.next
	*i.pprev = i.s
	return cur
}

// freeSpecial performs any cleanup on special s and deallocates it.
// s must already be unlinked from the specials list.
func freeSpecial(s *special, p unsafe.Pointer, size uintptr) {
	switch s.kind {
	case _KindSpecialFinalizer:
		sf := (*specialfinalizer)(unsafe.Pointer(s))