Nested waitUntil not awaited

[hansottowirtz]

When calling waitUntil inside another waitUntil, the nested waitUntil should also be awaited. This does not happen in Miniflare v2.

Minimal repro:

import { Miniflare } from "miniflare";

const mf = new Miniflare({
  script: `
  const delay = (n) => new Promise((res) => setTimeout(res, n))

  export default {
    async fetch(req, env, ctx) {
      const fn = async () => {
        await delay(2000);

        ctx.waitUntil(delay(2000).then(()=>{
          console.log("nested waitUntil promise resolved")
        }))

        console.log("fn resolved")
      };

      ctx.waitUntil(fn())

      return new Response("ok", { status: 200 })
    }
  }`,
  modules: true,
  compatibilityDate: "2023-03-30"
});


const res = await mf.dispatchFetch("https://test", { method: "GET" });
console.log("received response")
await res.waitUntil()
console.log("wait until done")

nested waitUntil promise resolved is never logged.