save              671 src/port.c         ScmWeakVector *save, *ports;
save              675 src/port.c         save = SCM_WEAK_VECTOR(Scm_MakeWeakVector(PORT_VECTOR_SIZE));
save              683 src/port.c                     Scm_WeakVectorSet(save, i, p);
save              700 src/port.c                 p = Scm_WeakVectorRef(save, i, SCM_FALSE);