/* Mark this node's free space & check for overlaps w/other sections */
        overlap = 0;
        for(u = start; u < end; u++) {
            if(udata->marker[u])
                overlap++;
            udata->marker[u] = 1;
        } /* end for */
        /* Flag overlaps */
        if (overlap)
            fprintf(udata->stream, "***THAT FREE BLOCK OVERLAPPED A PREVIOUS ONE!\n");
            HDfprintf(udata->stream, "***THAT FREE BLOCK OVERLAPPED A PREVIOUS ONE!\n");
        else
            udata->amount_free += len;
    } /* end if */
    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5HF_dblock_debug_cb() */
/*-------------------------------------------------------------------------
 * Function:    H5HF_dblock_debug