Firebase-tools: Cannot set property config of #<Object> which has only a getter

@boddy33 huh ok that's extremely strange. Is there absolutely nothing else firebase-debug.log? Or if you run the command with --debug?

Looks like its a bug in emulator runtime.

[debug] [2020-05-28T19:48:29.510Z] ----------------------------------------------------------------------
[debug] [2020-05-28T19:48:29.511Z] Command:       /path/to/node-v12.16.3-darwin-x64/bin/node /path/to/node/bin/firebase functions:shell
[debug] [2020-05-28T19:48:29.511Z] CLI Version:   8.4.0
[debug] [2020-05-28T19:48:29.512Z] Platform:      darwin
[debug] [2020-05-28T19:48:29.512Z] Node Version:  v12.16.3
[debug] [2020-05-28T19:48:29.512Z] Time:          Thu May 28 2020 20:48:29 GMT+0100 (British Summer Time)
[debug] [2020-05-28T19:48:29.512Z] ----------------------------------------------------------------------
[debug] [2020-05-28T19:48:29.512Z] 
[debug] [2020-05-28T19:48:29.518Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"]
[debug] [2020-05-28T19:48:29.519Z] > authorizing via signed-in user
[debug] [2020-05-28T19:48:29.519Z] [iam] checking project firebase-project for permissions ["firebase.projects.get"]
[debug] [2020-05-28T19:48:29.521Z] >>> HTTP REQUEST POST https://cloudresourcemanager.googleapis.com/v1/projects/firebase-project:testIamPermissions  
 {"permissions":["firebase.projects.get"]}
[debug] [2020-05-28T19:48:30.208Z] <<< HTTP RESPONSE 200 {"content-type":"application/json; charset=UTF-8","vary":"X-Origin, Referer, Origin,Accept-Encoding","date":"Thu, 28 May 2020 19:48:30 GMT","server":"ESF","cache-control":"private","x-xss-protection":"0","x-frame-options":"SAMEORIGIN","x-content-type-options":"nosniff","server-timing":"gfet4t7; dur=563","alt-svc":"h3-27=\":443\"; ma=2592000,h3-25=\":443\"; ma=2592000,h3-T050=\":443\"; ma=2592000,h3-Q050=\":443\"; ma=2592000,h3-Q049=\":443\"; ma=2592000,h3-Q048=\":443\"; ma=2592000,h3-Q046=\":443\"; ma=2592000,h3-Q043=\":443\"; ma=2592000,quic=\":443\"; ma=2592000; v=\"46,43\"","accept-ranges":"none","transfer-encoding":"chunked"}
[warn] ⚠  Your requested "node" version "10" doesn't match your global version "12" {"metadata":{"emulator":{"name":"functions"},"message":"Your requested \"node\" version \"10\" doesn't match your global version \"12\""}}
[debug] [2020-05-28T19:48:30.226Z] [functions] Watching "/path/to/app" for Cloud Functions...
[debug] [2020-05-28T19:48:30.233Z] DEBUG: [worker-pool] addWorker(~diagnostic~)
[debug] [2020-05-28T19:48:30.234Z] DEBUG: [worker-pool] Adding worker with key ~diagnostic~, total=1
[debug] [2020-05-28T19:48:30.234Z] DEBUG: [worker-pool] submitWork(triggerId=)
[debug] [2020-05-28T19:48:30.234Z] DEBUG: [worker-~diagnostic~-2336cd45-d0fd-4176-8826-39b0820a42c8]: Assigning socketPath: /var/folders/5v/7080hjcx6vb_d52z1clvxqd80000gn/T/fire_emu_24604.sock
[debug] [2020-05-28T19:48:30.234Z] DEBUG: [worker-~diagnostic~-2336cd45-d0fd-4176-8826-39b0820a42c8]: BUSY
[debug] [2020-05-28T19:48:30.430Z] DEBUG: [runtime-status] [24604] Functions runtime initialized. {"cwd":"/path/to/app","node_version":"12.16.3"}
[debug] [2020-05-28T19:48:30.431Z] DEBUG: [runtime-status] [24604] Disabled runtime features: undefined
[debug] [2020-05-28T19:48:30.434Z] DEBUG: [runtime-status] [24604] Resolved module firebase-admin {"declared":true,"installed":true,"version":"8.12.1","resolution":"/path/to/app/node_modules/firebase-admin/lib/index.js"}
[debug] [2020-05-28T19:48:30.440Z] DEBUG: [runtime-status] [24604] Resolved module firebase-functions {"declared":true,"installed":true,"version":"3.6.2","resolution":"/path/to/app/node_modules/firebase-functions/lib/index.js"}
[debug] [2020-05-28T19:48:30.441Z] DEBUG: [runtime-status] [24604] Outgoing network have been stubbed. [{"name":"http","status":"mocked"},{"name":"http","status":"mocked"},{"name":"https","status":"mocked"},{"name":"https","status":"mocked"},{"name":"net","status":"mocked"}]
[debug] [2020-05-28T19:48:30.499Z] DEBUG: [runtime-status] [24604] Checked functions.config() {"config":{}}
[debug] [2020-05-28T19:48:30.499Z] DEBUG: [runtime-status] [24604] Error in handleMessage: {"frb":{"cwd":"/path/to/app","projectId":"firebase-project","triggerId":"","emulators":{},"socketPath":"/var/folders/5v/7080hjcx6vb_d52z1clvxqd80000gn/T/fire_emu_24604.sock"},"opts":{"nodeBinary":"/path/to/node-v12.16.3-darwin-x64/bin/node"}} => TypeError: Cannot set property config of #<Object> which has only a getter: TypeError: Cannot set property config of #<Object> which has only a getter
    at /path/to/node-v12.16.3-darwin-x64/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:455:19
    at Generator.next (<anonymous>)
    at fulfilled (/path/to/node-v12.16.3-darwin-x64/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:5:58)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
[warn] ⚠  functions: Cannot set property config of #<Object> which has only a getter {"metadata":{"emulator":{"name":"functions"},"message":"Cannot set property config of #<Object> which has only a getter"}}
[warn] ⚠  Your function was killed because it raised an unhandled error. {"metadata":{"emulator":{"name":"functions"},"message":"Your function was killed because it raised an unhandled error."}}
[debug] [2020-05-28T19:48:30.504Z] DEBUG: [worker-~diagnostic~-2336cd45-d0fd-4176-8826-39b0820a42c8]: exited
[debug] [2020-05-28T19:48:30.504Z] DEBUG: [worker-~diagnostic~-2336cd45-d0fd-4176-8826-39b0820a42c8]: FINISHED

Looks like this is an issue with v8.x.x. Downgrading to v7.16.2 works.

I have a feeling this may be related to today's firebase-functions release:
https://github.com/firebase/firebase-functions/releases/tag/v3.6.2

I should be something very recent. Looking at other issues, v8.x.x emulator was working at some point (and v8.4.0 was released a week ago).

hi,
have the same issue :)

thanks @uditha-atukorala it works :)

when you install package [email protected] then
HTTP requests works for me

Fix is coming in #2302 ... if it's approved and merged we'll try to release ASAP

Running into the exact same issue. macOS

this has had me stumped for the last few hours. I have the same index.js as @boddy33 and it even happens when index.js is empty. Here is my firebase-debug.log:

[debug] [2020-05-28T19:54:42.206Z] [runtime-status] [27226] Checked functions.config() {"config":{}} 
[debug] [2020-05-28T19:54:42.206Z] [runtime-status] [27226] Error in handleMessage: {"frb":{"cwd":"/Users/aprilpolubiec/Documents/my-project/functions","projectId":"my-project","triggerId":"","emulators":{},"socketPath":"/var/folders/sh/fsnv9b8n29713r9d3kj_7w4c0000gn/T/fire_emu_27226.sock"},"opts":{"nodeBinary":"/Users/aprilpolubiec/.nvm/versions/node/v13.7.0/bin/node"}} => TypeError: Cannot set property config of #<Object> which has only a getter: TypeError: Cannot set property config of #<Object> which has only a getter
    at /Users/aprilpolubiec/.nvm/versions/node/v13.7.0/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:457:19
    at Generator.next (<anonymous>)
    at fulfilled (/Users/aprilpolubiec/.nvm/versions/node/v13.7.0/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:5:58)
    at processTicksAndRejections (internal/process/task_queues.js:97:5) 
[warn] ⚠  functions: Cannot set property config of #<Object> which has only a getter
[warn] ⚠  Your function was killed because it raised an unhandled error.

we are waiting curious for approval

The fix was just released in version 8.4.1 of firebase-tools

thank you for that...just in time

validated. Thank you.

Hello
About 2 days ago I was deploying functions and everything went without any problems, unfortunately since yesterday I am not able to do deploy. I had quite old packages:

    "firebase": "^5.9.2",
    "firebase-admin": "~8.9.0",
    "firebase-functions": "^3.3.0",
    "firebase-tools": "^4.0.0",

and I was getting the following:

but was able to run functions locally (--serve).

Today I've updated all of dependencies to newer versions, which in theory should include a hotfix, but unfortunately now I'm getting a new bug, the same as in this issue.

    "firebase": "^7.14.5",
    "firebase-admin": "~8.10.0",
    "firebase-functions": "^3.6.2",
    "firebase-tools": "^8.4.1",

[2020-05-29T09:30:46.002Z] [runtime-status] [42525] Error in handleMessage: {"frb":{"cwd":"/Users/jakub.jodelka/xxxProject/backend","projectId":"xxxProject","triggerId":"","emulators":{},"socketPath":"/var/folders/nj/4g6vwdm90bl4tmktf8hpn__00000gp/T/fire_emu_42525.sock"},"opts":{"nodeBinary":"/usr/local/bin/firebase"}} => TypeError: Cannot set property config of #<Object> which has only a getter: TypeError: Cannot set property config of #<Object> which has only a getter
    at /Users/jakub.jodelka/.cache/firebase/tools/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:455:19
    at Generator.next (<anonymous>)
    at fulfilled (/Users/jakub.jodelka/.cache/firebase/tools/lib/node_modules/firebase-tools/lib/emulator/functionsEmulatorRuntime.js:5:58)
    at processTicksAndRejections (internal/process/task_queues.js:97:5) 
⚠  functions: Cannot set property config of #<Object> which has only a getter
⚠  Your function was killed because it raised an unhandled error.

I'm not able to deploy functions, but I can't even run them locally because of the same problem.

The fix was just released in version 8.4.1 of firebase-tools

Should my functions deploy correctly if I have the latest versions?

@samtstern ^
Not sure if this issue should be closed.

@jakubjodelka can you try clearing your node_modules folder and running npm install again? If this keeps happening for you after that and with firebase --version showing 8.4.1 let me know.

Thanks. Working for me now.

[2020-05-29T14:38:16.042Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"]
[2020-05-29T14:38:16.043Z] > authorizing via signed-in user
[2020-05-29T14:38:16.044Z] [iam] checking project bryn-todoapp-27e80 for permissions ["firebase.projects.get"]
[2020-05-29T14:38:16.047Z] >>> HTTP REQUEST POST https://cloudresourcemanager.googleapis.com/v1/projects/bryn-todoapp-27e80:testIamPermissions
 {"permissions":["firebase.projects.get"]}
[2020-05-29T14:38:16.314Z] <<< HTTP RESPONSE 200 {"content-type":"application/json; charset=UTF-8","vary":"X-Origin, Referer, Origin,Accept-Encoding","date":"Fri, 29 May 2020 14:38:16 GMT","server":"ESF","cache-control":"private","x-xss-protection":"0","x-frame-options":"SAMEORIGIN","x-content-type-options":"nosniff","server-timing":"gfet4t7; dur=117","alt-svc":"h3-27=\":443\"; ma=2592000,h3-25=\":443\"; ma=2592000,h3-T050=\":443\"; ma=2592000,h3-Q050=\":443\"; ma=2592000,h3-Q049=\":443\"; ma=2592000,h3-Q048=\":443\"; ma=2592000,h3-Q046=\":443\"; ma=2592000,h3-Q043=\":443\"; ma=2592000,quic=\":443\"; ma=2592000; v=\"46,43\"","accept-ranges":"none","transfer-encoding":"chunked"}
[2020-05-29T14:38:16.316Z] >>> HTTP REQUEST GET https://firebase.googleapis.com/v1beta1/projects/bryn-todoapp-27e80  

[2020-05-29T14:38:16.590Z] <<< HTTP RESPONSE 200 {"content-type":"application/json; charset=UTF-8","vary":"X-Origin, Referer, Origin,Accept-Encoding","date":"Fri, 29 May 2020 14:38:16 GMT","server":"ESF","cache-control":"private","x-xss-protection":"0","x-frame-options":"SAMEORIGIN","x-content-type-options":"nosniff","alt-svc":"h3-27=\":443\"; ma=2592000,h3-25=\":443\"; ma=2592000,h3-T050=\":443\"; ma=2592000,h3-Q050=\":443\"; ma=2592000,h3-Q049=\":443\"; ma=2592000,h3-Q048=\":443\"; ma=2592000,h3-Q046=\":443\"; ma=2592000,h3-Q043=\":443\"; ma=2592000,quic=\":443\"; ma=2592000; v=\"46,43\"","accept-ranges":"none","transfer-encoding":"chunked"}

=== Serving from 'C:\Users\Bryn\Desktop\bryn-todoapp'...

+  functions: Using node@10 from host. {"metadata":{"emulator":{"name":"functions"},"message":"Using node@10 from host."}}
i  functions: Watching "C:\Users\Bryn\Desktop\bryn-todoapp\functions" for Cloud Functions... {"metadata":{"emulator":{"name":"functions"},"message":"Watching \"C:\\Users\\Bryn\\Desktop\\bryn-todoapp\\functions\" for Cloud Functions..."}}
[2020-05-29T14:38:18.632Z] [worker-pool] addWorker(~diagnostic~) {"metadata":{"emulator":{"name":"functions"},"message":"[worker-pool] addWorker(~diagnostic~)"}}
[2020-05-29T14:38:18.638Z] [worker-pool] Adding worker with key ~diagnostic~, total=1 {"metadata":{"emulator":{"name":"functions"},"message":"[worker-pool] Adding worker with key ~diagnostic~, total=1"}}     
[2020-05-29T14:38:18.638Z] [worker-pool] submitWork(triggerId=) {"metadata":{"emulator":{"name":"functions"},"message":"[worker-pool] submitWork(triggerId=)"}}
[2020-05-29T14:38:18.639Z] [worker-~diagnostic~-8db31d96-b4d5-4fa2-9230-e536f082a401]: Assigning socketPath: \\?\pipe\C:\Users\Bryn\Desktop\bryn-todoapp\functions\14372 {"metadata":{"emulator":{"name":"functions"},"message":"[worker-~diagnostic~-8db31d96-b4d5-4fa2-9230-e536f082a401]: Assigning socketPath: \\\\?\\pipe\\C:\\Users\\Bryn\\Desktop\\bryn-todoapp\\functions\\14372"}}
[2020-05-29T14:38:18.640Z] [worker-~diagnostic~-8db31d96-b4d5-4fa2-9230-e536f082a401]: BUSY {"metadata":{"emulator":{"name":"functions"},"message":"[worker-~diagnostic~-8db31d96-b4d5-4fa2-9230-e536f082a401]: 
BUSY"}}
[2020-05-29T14:38:18.955Z] [runtime-status] [14372] Functions runtime initialized. {"cwd":"C:\\Users\\Bryn\\Desktop\\bryn-todoapp\\functions","node_version":"10.10.0"} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [14372] Functions runtime initialized. {\"cwd\":\"C:\\\\Users\\\\Bryn\\\\Desktop\\\\bryn-todoapp\\\\functions\",\"node_version\":\"10.10.0\"}"}}
[2020-05-29T14:38:18.957Z] [runtime-status] [14372] Disabled runtime features: undefined {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [14372] Disabled runtime features: undefined"}}
[2020-05-29T14:38:18.960Z] [runtime-status] [14372] Resolved module firebase-admin {"declared":true,"installed":true,"version":"8.12.1","resolution":"C:\\Users\\Bryn\\Desktop\\bryn-todoapp\\functions\\node_modules\\firebase-admin\\lib\\index.js"} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [14372] Resolved module firebase-admin {\"declared\":true,\"installed\":true,\"version\":\"8.12.1\",\"resolution\":\"C:\\\\Users\\\\Bryn\\\\Desktop\\\\bryn-todoapp\\\\functions\\\\node_modules\\\\firebase-admin\\\\lib\\\\index.js\"}"}}
[2020-05-29T14:38:18.961Z] [runtime-status] [14372] Resolved module firebase-functions {"declared":true,"installed":true,"version":"3.6.2","resolution":"C:\\Users\\Bryn\\Desktop\\bryn-todoapp\\functions\\node_modules\\firebase-functions\\lib\\index.js"} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [14372] Resolved module firebase-functions {\"declared\":true,\"installed\":true,\"version\":\"3.6.2\",\"resolution\":\"C:\\\\Users\\\\Bryn\\\\Desktop\\\\bryn-todoapp\\\\functions\\\\node_modules\\\\firebase-functions\\\\lib\\\\index.js\"}"}}
!  functions: Your GOOGLE_APPLICATION_CREDENTIALS environment variable points to /home/user/Downloads/[bryn-todoapp-27e80-firebase-adminsdk-gp1c1-8bc2ce2561].json. Non-emulated services will access production using these credentials. Be careful! {"metadata":{"emulator":{"name":"functions"},"message":"Your GOOGLE_APPLICATION_CREDENTIALS environment variable points to /home/user/Downloads/[bryn-todoapp-27e80-firebase-adminsdk-gp1c1-8bc2ce2561].json. Non-emulated services will access production using these credentials. Be careful!"}}
[2020-05-29T14:38:18.974Z] [runtime-status] [14372] Outgoing network have been stubbed. [{"name":"http","status":"mocked"},{"name":"http","status":"mocked"},{"name":"https","status":"mocked"},{"name":"https","status":"mocked"},{"name":"net","status":"mocked"}] {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [14372] Outgoing network have been stubbed. [{\"name\":\"http\",\"status\":\"mocked\"},{\"name\":\"http\",\"status\":\"mocked\"},{\"name\":\"https\",\"status\":\"mocked\"},{\"name\":\"https\",\"status\":\"mocked\"},{\"name\":\"net\",\"status\":\"mocked\"}]"}}
[2020-05-29T14:38:19.003Z] [runtime-status] [14372] Checked functions.config() {"config":{}} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [14372] Checked functions.config() {\"config\":{}}"}}
[2020-05-29T14:38:19.009Z] [runtime-status] [14372] Error in handleMessage: {"frb":{"cwd":"C:\\Users\\Bryn\\Desktop\\bryn-todoapp\\functions","projectId":"bryn-todoapp-27e80","triggerId":"","emulators":{},"socketPath":"\\\\?\\pipe\\C:\\Users\\Bryn\\Desktop\\bryn-todoapp\\functions\\14372"},"opts":{"nodeBinary":"C:\\Program Files\\nodejs\\node.exe"}} => TypeError: Cannot set property config of #<Object> which has 
only a getter: TypeError: Cannot set property config of #<Object> which has only a getter
    at C:\Users\Bryn\AppData\Roaming\npm\node_modules\firebase-tools\lib\emulator\functionsEmulatorRuntime.js:455:19
    at Generator.next (<anonymous>)
    at fulfilled (C:\Users\Bryn\AppData\Roaming\npm\node_modules\firebase-tools\lib\emulator\functionsEmulatorRuntime.js:5:58)
    at process._tickCallback (internal/process/next_tick.js:68:7) {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [14372] Error in handleMessage: {\"frb\":{\"cwd\":\"C:\\\\Users\\\\Bryn\\\\Desktop\\\\bryn-todoapp\\\\functions\",\"projectId\":\"bryn-todoapp-27e80\",\"triggerId\":\"\",\"emulators\":{},\"socketPath\":\"\\\\\\\\?\\\\pipe\\\\C:\\\\Users\\\\Bryn\\\\Desktop\\\\bryn-todoapp\\\\functions\\\\14372\"},\"opts\":{\"nodeBinary\":\"C:\\\\Program Files\\\\nodejs\\\\node.exe\"}} => TypeError: Cannot set property config of #<Object> which has only a getter: TypeError: Cannot set property config of #<Object> which has only a getter\n    at C:\\Users\\Bryn\\AppData\\Roaming\\npm\\node_modules\\firebase-tools\\lib\\emulator\\functionsEmulatorRuntime.js:455:19\n    at Generator.next (<anonymous>)\n   
 at fulfilled (C:\\Users\\Bryn\\AppData\\Roaming\\npm\\node_modules\\firebase-tools\\lib\\emulator\\functionsEmulatorRuntime.js:5:58)\n    at process._tickCallback (internal/process/next_tick.js:68:7)"}}     
!  functions: Cannot set property config of #<Object> which has only a getter {"metadata":{"emulator":{"name":"functions"},"message":"Cannot set property config of #<Object> which has only a getter"}}        
!  Your function was killed because it raised an unhandled error. {"metadata":{"emulator":{"name":"functions"},"message":"Your function was killed because it raised an unhandled error."}}
[2020-05-29T14:38:19.019Z] [worker-~diagnostic~-8db31d96-b4d5-4fa2-9230-e536f082a401]: exited {"metadata":{"emulator":{"name":"functions"},"message":"[worker-~diagnostic~-8db31d96-b4d5-4fa2-9230-e536f082a401]: exited"}}
[2020-05-29T14:38:19.029Z] [worker-~diagnostic~-8db31d96-b4d5-4fa2-9230-e536f082a401]: FINISHED {"metadata":{"emulator":{"name":"functions"},"message":"[worker-~diagnostic~-8db31d96-b4d5-4fa2-9230-e536f082a401]: FINISHED"}}  `

I'm still getting it I did all the above, any thoughts?

@COFFEEEADDICT check that firebase --version shows 8.4.1

Hi guys,

I've received this error after an update in the firebase-functions package (3.6.2).

In my case, the solution was to delete /node_modules and downgrade the firebase-functions to the previous version (npm install --save [email protected]).

Hello guys,

The first check which version you've installed mine was 8.1.1
Please update firebase-tools by calling

sudo npm i -g firebase-tools

This will install latest version 8.4.1
And It fixed my issue.
In fact, I have installed the latest firebase function and admin
"firebase-admin": "8.12.1",
"firebase-functions": "3.6.1",

I hope you've fixed the issue.

working thanks @iamsrujal

I'm still getting the issue any help ?

System
Mac OS Catalina : 10.15.4
Node: v10.21.0
Java: openjdk version "14.0.1" 2020-04-14

Package Versions:
"firebase-admin": "^8.12.1",
"firebase-functions": "^3.7.0",
[email protected]

The command I executed:
firebase emulators:start --only functions

Console Output:
i Starting emulators: ["functions"]
✔ functions: Using node@10 from host.
✔ functions: Emulator started at http://localhost:5001
i functions: Watching "/Users/chamika/Projects/Bitsmedia/Muslim-Pro-Firebase/functions" for Cloud Functions...
⚠ TypeError: Cannot set property config of #