/*
     * If the page is deleted and the deletion is globally visible, don't bother reading and
     * explicitly instantiating the existing page. Get a fresh page and pretend we got it by reading
     * the on-disk page. Note that it's important to set the instantiated flag on the page so that
     * reconciling the parent internal page knows it was previously deleted. Otherwise it's possible
     * to write out a reference to the original page without the deletion, which will cause it to
     * come back to life unexpectedly.
     *
     * Setting the instantiated flag requires a modify structure. We don't need to mark it dirty; if
     * it gets discarded before something else modifies it, eviction will see the instantiated flag
     * and set the ref state back to WT_REF_DELETED.
     *
     * Skip this optimization in cases that need the obsolete values. To minimize the number of
     * special cases, use the same test as for skipping instantiation below.
     */
    if (previous_state == WT_REF_DELETED && !F_ISSET(btree, WT_BTREE_SALVAGE | WT_BTREE_VERIFY)) {
        /*
         * If the deletion has not yet been found to be globally visible (page_del isn't NULL),
         * check if it is now, in case we can in fact avoid reading the page. Hide prepared deletes
         * from this check; if the deletion is prepared we still need to load the page, because the
         * reader might be reading at a timestamp early enough to not conflict with the prepare.
         * Update oldest before checking; we're about to read from disk so it's worth doing some
         * work to avoid that.
         */
        WT_ERR(__wt_txn_update_oldest(session, WT_TXN_OLDEST_STRICT | WT_TXN_OLDEST_WAIT));
        if (ref->page_del != NULL && __wt_page_del_visible_all(session, ref->page_del, true))
            __wt_overwrite_and_free(session, ref->page_del);

        if (ref->page_del == NULL) {
            WT_ERR(__wti_btree_new_leaf_page(session, ref));
            WT_ERR(__wt_page_modify_init(session, ref->page));
            ref->page->modify->instantiated = true;
            goto skip_read;
        }
    }