Cloud Functions deployment fails: "Function failed on loading user code. Error message: Code in file lib/index.js can't be loaded."
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.
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Doug Stevenson
I am available as a consultant specializing in Firebase and can help you on an hourly, paid basis with Firebase products. I dig Firebase, Android, Nodejs, Google Cloud, TypeScript, Kotlin.
Updated on June 25, 2022Comments
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Doug Stevenson about 2 years
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?
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ToraCode about 5 yearsIncrease
ecmaVersion
to 8 will be helpful -
Nikhil Maheshwari over 4 yearsClear explanation and perfect solution. Thanks
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Ndivhuwo over 3 yearsUsing a higher node engine helped. Thanks