void xrangeGenericCommand(client *c, int rev) {
    robj *o;
    stream *s;
    streamID startid, endid;
    long long count = 0;
    robj *startarg = rev ? c->argv[3] : c->argv[2];
    robj *endarg = rev ? c->argv[2] : c->argv[3];

    if (streamParseIDOrReply(c,startarg,&startid,0) == C_ERR) return;
    if (streamParseIDOrReply(c,endarg,&endid,UINT64_MAX) == C_ERR) return;

    /* Parse the COUNT option if any. */
    if (c->argc > 4) {
        for (int j = 4; j < c->argc; j++) {
            int additional = c->argc-j-1;
            if (strcasecmp(c->argv[j]->ptr,"COUNT") == 0 && additional >= 1) {
                if (getLongLongFromObjectOrReply(c,c->argv[j+1],&count,NULL)
                    != C_OK) return;
                if (count < 0) count = 0;
                j++; /* Consume additional arg. */
            } else {
                addReply(c,shared.syntaxerr);
                return;
            }
        }
    }

    /* Return the specified range to the user. */
    if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.emptymultibulk)) == NULL
        || checkType(c,o,OBJ_STREAM)) return;
    s = o->ptr;
    streamReplyWithRange(c,s,&startid,&endid,count,rev,NULL,NULL,0,NULL);
}

The product does not correctly convert an object, resource, or structure from one type to a different type.