recursive_pop    4609 thread.c       	    if (!recursive_pop(p.list, p.objid, p.pairid)) goto invalid;
recursive_pop    4610 thread.c       	    if (!recursive_pop(p.list, ID2SYM(recursive_key), 0)) goto invalid;
recursive_pop    4624 thread.c       	    if (!recursive_pop(p.list, p.objid, p.pairid)) {