Firebase-functions: An accessor cannot be declared in an ambient context.

[eng-dibo]

I recently updated firebase-functions and all fire base related packages, but I got an error : An accessor cannot be declared in an ambient context. when I tried to build my project.

before this update my project run and deployed successfully to firebase, no any other modification made.

error details:

> tsc -p firebase/tsconfig.json 

node_modules/firebase-functions/lib/apps.d.ts(26,13): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/apps.d.ts(33,21): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/function-builder.d.ts(53,9): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/function-builder.d.ts(66,9): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/function-builder.d.ts(100,9): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/function-builder.d.ts(114,9): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/function-builder.d.ts(121,9): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/function-builder.d.ts(128,9): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/function-builder.d.ts(137,9): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/function-builder.d.ts(150,9): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/function-builder.d.ts(159,9): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/function-builder.d.ts(165,9): error TS1086: An accessor cannot be declared in an ambient context.
node_modules/firebase-functions/lib/handler-builder.d.ts(15,9): error TS1086: An accessor cannot be declared in an ambient context.

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[JaquelinaG]

@eng-dibo I have the same problem today, It worked fine yesterday. Have you found a solution?

[eng-dibo]

No, but it seems you have to update your typescript version.
@JaquelinaG

[joehan]

Hey all, thanks for reporting this. What typescript version were you on when you got this error, and what typescript version did you downgrade to when you fixed it?

[eng-dibo]

at the time of this error appeared, I used the same Typescript as before updating firebase-tools.
i.e: I didn't update Typescript.
@joehan

[laurenzlong]

Thanks for reporting! Looks like we needed to update our TS version. Will be addressed in https://github.com/firebase/firebase-functions/pull/668. For now you can resolve by running this in your functions directory:

npm i typescript@latest --save-dev