es[v].maxima = pool_calloc (examine->pool, examine->calc_extremes, sizeof (*es[v].maxima));
es[v].minima = pool_calloc (examine->pool, examine->calc_extremes, sizeof (*es[v].minima));
es[v].maxima = pool_calloc (examine->pool, examine->calc_extremes, sizeof (*es[v].maxima));
es[v].minima = pool_calloc (examine->pool, examine->calc_extremes, sizeof (*es[v].minima));