next.js

f8b31742 - [dynamicIO] use new heuristic to track whether server render is dynamic (#73751)

[dynamicIO] use new heuristic to track whether server render is dynamic (#73751) Instead of relying on onError just use the timing of the prerender resolution to determine whether the server render completed before aborting. React is going to remove onError and onPostpone calls from `prerender` in flight [31715](https://github.com/facebook/react/pull/31715). This is because semantically the error is going to be hidden from the prerender and on resume it might not error. So rather than relying on whether the error callback is called we simply infer whether we are done by checking if the `prerender` resolved prior to our abort deadline. In our case it is possible we also aborted earlier than the deadline because you can call something like `Math.random()` which requires the `prerender` to halt synchronously so we also check the signal status in our deadline task. We don't expect this to change any semantics so there are no altered tests. This is only currently implemented in the dynamicIO + PPR case because that is the only case using experimental React with `prerender`. When dynamicIO is on by itself we still use `renderToReadableStream` which does not have halt semantics. We will switch to `prerender` when it is available in React's stable channel