waitUntil illigal invocation

I was planning to use waitUntil, but as soon it runs the worker die with this error:

[mf:err] TypeError: Illegal invocation
    at Object.fetch (/path/src/index.js:59:5)
    at __facade_modules_fetch__ (/tmp/tmp-778150-oye4YPdtwnN2/middleware-loader.entry.ts:46:16)
    at __facade_invokeChain__ (/path/node_modules/wrangler/templates/middleware/common.ts:53:9)
    at Object.next (/path/node_modules/wrangler/templates/middleware/common.ts:50:11)
    at jsonError (/path/node_modules/wrangler/templates/middleware/middleware-miniflare3-json-error.ts:22:30)
    at __facade_invokeChain__ (/path/node_modules/wrangler/templates/middleware/common.ts:53:9)
    at __facade_invoke__ (/path/node_modules/wrangler/templates/middleware/common.ts:63:9)
    at Object.fetch (/tmp/tmp-778150-oye4YPdtwnN2/middleware-loader.entry.ts:114:11)

[mf:err] TypeError: Illegal invocation
    at Object.fetch (/path/src/index.js:59:5)
    at __facade_modules_fetch__ (/tmp/tmp-778150-oye4YPdtwnN2/middleware-loader.entry.ts:46:16)
    at __facade_invokeChain__ (/path/node_modules/wrangler/templates/middleware/common.ts:53:9)
    at Object.next (/path/node_modules/wrangler/templates/middleware/common.ts:50:11)
    at jsonError (/path/node_modules/wrangler/templates/middleware/middleware-miniflare3-json-error.ts:22:30)
    at __facade_invokeChain__ (/path/node_modules/wrangler/templates/middleware/common.ts:53:9)
    at __facade_invoke__ (/path/node_modules/wrangler/templates/middleware/common.ts:63:9)
    at Object.fetch (/tmp/tmp-778150-oye4YPdtwnN2/middleware-loader.entry.ts:114:11)

wrangler version 3.2.0 and 3.3.0. In this example I'm just running a resolve, running anything else the promise will run but the worker will die anyway

export default {
  fetch: async (request, env, { waitUntil }) => {
    waitUntil(Promise.resolve())
    return new Response('hello')
  }
}

export default {
  fetch: async (request, env, { waitUntil }) => {
    waitUntil(Promise.resolve())
    return new Response('hello')
  }
}

am I doing something wrong?

2 Replies

o0th•16mo ago

Ok I don't know if I'm missing something, but this works

export default {
  fetch: async (request, env, ctx) => {
    ctx.waitUntil(Promise.resolve())
    return new Response('hello')
  }
}

export default {
  fetch: async (request, env, ctx) => {
    ctx.waitUntil(Promise.resolve())
    return new Response('hello')
  }
}

sexnine•10mo ago

for anyone else stumbling upon this issue in the future (like me :3), i had a similar issue using trpc in sveltekit where i was adding the function to the trpc context and it was failing with Illegal invocation: assigning a function that calls waitUntil instead solved this issue for me:

export async function createContext(event: RequestEvent) {
  return {
    event,
-   waitUntil: event.platform.context.waitUntil,
+   waitUntil: (promise: Promise<any>) => {
+     event.platform.context.waitUntil(promise);
+   },
  };
}

export async function createContext(event: RequestEvent) {
  return {
    event,
-   waitUntil: event.platform.context.waitUntil,
+   waitUntil: (promise: Promise<any>) => {
+     event.platform.context.waitUntil(promise);
+   },
  };
}

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waitUntil illigal invocation