--- ObjectSpace.add_finalizer(proc)

    proc եʥ饤Ȥꤷޤ

    call_finalizer ǻꤷ֥Ȥ
    Υ֥Ȥ ID(c.f Object#id [Object/id])
    եʥ饤ɾޤ

    proc ֤ޤ

    Υ᥽åɤϡobsolete Ǥ 
    ObjectSpace.define_finalizer ѤƤ

