listParam isn't loaded successfully in the emulator

[tzappia]

Related issues

https://github.com/firebase/firebase-functions/issues/1523

[REQUIRED] Version info

node:

v22.8.0

firebase-functions:

5.1.1

firebase-tools:

13.16.0

firebase-admin:

12.4.0

[REQUIRED] Test case

import { beforeUserCreated } from "firebase-functions/v2/identity";
import { myList } from './params.js';

export const beforecreated = beforeUserCreated((event) => {
  console.log('My list', myList.value());
});

In params.js

export const myList = defineList('MY_LIST', { default: [] });

In env.local

MY_LIST=something,somethingElse

[REQUIRED] Steps to reproduce

Run a function that uses a listParam, in this case I try to create a user so the beforeUserCreated blocking function is invoked.

[REQUIRED] Expected behavior

console log shows "My list [something, somethingElse]"

[REQUIRED] Actual behavior

>  {"severity":"ERROR","message":"Unhandled error SyntaxError: Unexpected token 's', \"something,somethingElse\" is not valid JSON\n    at JSON.parse (<anonymous>)\n    at ListParam.runtimeValue (/Users/tzappia/workspace/hrvst/functions/node_modules/firebase-functions/lib/params/types.js:378:26)\n    at ListParam.value (/Users/tzappia/workspace/hrvst/functions/node_modules/firebase-functions/lib/params/types.js:39:21)\n    at file:///Users/tzappia/workspace/hrvst/functions/lib/triggers/users.js:50:49\n    at wrappedHandler (/Users/tzappia/workspace/hrvst/functions/node_modules/firebase-functions/lib/v2/providers/identity.js:58:39)\n    at /Users/tzappia/workspace/hrvst/functions/node_modules/firebase-functions/lib/common/providers/identity.js:458:28\n    at /Users/tzappia/workspace/hrvst/functions/node_modules/firebase-functions/lib/common/onInit.js:33:16\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async runFunction (/Users/tzappia/.nvm/versions/node/v22.8.0/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:506:9)\n    at async runHTTPS (/Users/tzappia/.nvm/versions/node/v22.8.0/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:531:5)"}

Were you able to successfully deploy your functions?

I was able to successfully deploy and the listParam seems to work fine in a production environment. Is the emulator parsing the .env file differently in the emulator vs. production? Seems to be a similar behaviour in the linked bug report that was closed.