Cloud Functions deployment fails: "Function failed on loading user code. Error message: Code in file lib/index.js can't be loaded."

Question

I upgraded my firebase-functions module to 3.0.1. Now, when I deploy Cloud Functions, I get the warning message:

⚠ functions: Deploying functions to Node 6 runtime, which is deprecated. Node 8 is available and is the recommended runtime.

Then, deployment fails with this:

Function failed on loading user code. Error message: Code in file lib/index.js can't be loaded.
Is there a syntax error in your code?
Detailed stack trace: /user_code/node_modules/firebase-functions/lib/providers/https.js:282
    const func = async (req, res) => {
                       ^

SyntaxError: Unexpected token (
    at createScript (vm.js:56:10)
    at Object.runInThisContext (vm.js:97:10)
    at Module._compile (module.js:549:28)
    at Object.Module._extensions..js (module.js:586:10)
    at Module.load (module.js:494:32)
    at tryModuleLoad (module.js:453:12)
    at Function.Module._load (module.js:445:3)
    at Module.require (module.js:504:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/user_code/node_modules/firebase-functions/lib/index.js:39:15)

How can I fix this?

Doug Stevenson · Accepted Answer · 2019-06-12 23:40:09Z

16

In the past, node 6 was the default target runtime. Now, node 6 has expired LTS (Long Term Support). With CLI version 6.8.0, node 6 was deprecated, and you were encouraged to target node 8 for deployment instead. Now, starting with [email protected], node 6 support is fully removed, and you must explicitly target node 8 in your package.json:

{
  // other configurations here…
  "dependencies": {
  },
  // Add an “engines” child to choose a node version, here it’s node 8.
  "engines": {
    "node": "8"
  }
}

Another related change in this version is a dependency on firebase-admin 8.x, which also drops support for node 6.

The error message itself is indicating that the keyword async isn't recognized, which is not supported by node 6.

edited Jun 12, 2019 at 23:40

answered Jun 12, 2019 at 23:13

Doug Stevenson

321k37 gold badges458 silver badges474 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

ToraCode Over a year ago

Increase ecmaVersion to 8 will be helpful

Collectives™ on Stack Overflow

Cloud Functions deployment fails: "Function failed on loading user code. Error message: Code in file lib/index.js can't be loaded."

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related