--inspect-functions not listening on port 9229

### [REQUIRED] Environment info

**firebase-tools:** 13.0.3
**node:** v18.19.0

**Platform:** macOS 14.2.1 (23C71)

### [REQUIRED] Test case

```
firebase emulators:start --only functions --inspect-functions --debug
```

### [REQUIRED] Steps to reproduce

```
firebase emulators:start --only functions --inspect-functions --debug
```

### [REQUIRED] Expected behavior

Firebase emulator should open port 9229 for connections and allow debuggers (like VSCode) to connect.

### [REQUIRED] Actual behavior

```
> firebase emulators:start --only functions --inspect-functions --debug
[2024-01-23T20:17:43.874Z] > 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"]
[2024-01-23T20:17:43.875Z] > authorizing via signed-in user (REDACTED)
i emulators: Starting emulators: functions {"metadata":{"emulator":{"name":"hub"},"message":"Starting emulators: functions"}}
[2024-01-23T20:17:44.763Z] [logging] Logging Emulator only supports listening on one address (127.0.0.1). Not listening on ::1
[2024-01-23T20:17:44.763Z] assigned listening specs for emulators {"user":{"hub":[{"address":"127.0.0.1","family":"IPv4","port":4400},{"address":"::1","family":"IPv6","port":4400}],"ui":[{"address":"127.0.0.1","family":"IPv4","port":4000},{"address":"::1","family":"IPv6","port":4000}],"logging":[{"address":"127.0.0.1","family":"IPv4","port":4500}]},"metadata":{"message":"assigned listening specs for emulators"}}
[2024-01-23T20:17:44.770Z] [hub] writing locator at /var/folders/31/dstnktz109vcsd3y_h0mrncm0000gn/T/REDACTED.json
[2024-01-23T20:17:45.220Z] [eventarc] Eventarc Emulator only supports listening on one address (127.0.0.1). Not listening on ::1
[2024-01-23T20:17:45.220Z] late-assigned ports for functions and eventarc emulators {"user":{"hub":[{"address":"127.0.0.1","family":"IPv4","port":4400},{"address":"::1","family":"IPv6","port":4400}],"ui":[{"address":"127.0.0.1","family":"IPv4","port":4000},{"address":"::1","family":"IPv6","port":4000}],"logging":[{"address":"127.0.0.1","family":"IPv4","port":4500}],"functions":[{"address":"0.0.0.0","family":"IPv4","port":5001}],"eventarc":[{"address":"127.0.0.1","family":"IPv4","port":9299}]},"metadata":{"message":"late-assigned ports for functions and eventarc emulators"}}
⚠ functions: You are running the Functions emulator in debug mode (port=9229). This means that functions will execute in sequence rather than in parallel. {"metadata":{"emulator":{"name":"functions"},"message":"You are running the Functions emulator in debug mode (port=9229). This means that functions will execute in sequence rather than in parallel."}}
⚠ functions: The following emulators are not running, calls to these services from the Functions emulator will affect production: auth, firestore, database, hosting, pubsub, storage {"metadata":{"emulator":{"name":"functions"},"message":"The following emulators are not running, calls to these services from the Functions emulator will affect production: \u001b[1mauth, firestore, database, hosting, pubsub, storage\u001b[22m"}}
[2024-01-23T20:17:45.223Z] defaultcredentials: writing to file /Users/REDACTED/.config/firebase/REDACTED.json
[2024-01-23T20:17:45.225Z] Setting GAC to /Users/REDACTED/.config/firebase/REDACTED.json {"metadata":{"emulator":{"name":"functions"},"message":"Setting GAC to /Users/REDACTED/.config/firebase/REDACTED.json"}}
[2024-01-23T20:17:45.227Z] >>> [apiv2][query] GET https://firebase.googleapis.com/v1beta1/projects/REDACTED/adminSdkConfig [none]
[2024-01-23T20:17:45.699Z] <<< [apiv2][status] GET https://firebase.googleapis.com/v1beta1/projects/REDACTED/adminSdkConfig 200
[2024-01-23T20:17:45.700Z] <<< [apiv2][body] GET https://firebase.googleapis.com/v1beta1/projects/REDACTED/adminSdkConfig {"projectId":"REDACTED","storageBucket":"REDACTED.appspot.com","locationId":"us-central"}
[2024-01-23T20:17:45.738Z] Ignoring unsupported arg: auto_download {"metadata":{"emulator":{"name":"ui"},"message":"Ignoring unsupported arg: auto_download"}}
[2024-01-23T20:17:45.738Z] Ignoring unsupported arg: port {"metadata":{"emulator":{"name":"ui"},"message":"Ignoring unsupported arg: port"}}
[2024-01-23T20:17:45.738Z] Starting Emulator UI with command {"binary":"node","args":["/Users/REDACTED/.cache/firebase/emulators/ui-v1.11.7/server/server.js"],"optionalArgs":[],"joinArgs":false} {"metadata":{"emulator":{"name":"ui"},"message":"Starting Emulator UI with command {\"binary\":\"node\",\"args\":[\"/Users/REDACTED/.cache/firebase/emulators/ui-v1.11.7/server/server.js\"],\"optionalArgs\":[],\"joinArgs\":false}"}}
i ui: Emulator UI logging to ui-debug.log {"metadata":{"emulator":{"name":"ui"},"message":"Emulator UI logging to \u001b[1mui-debug.log\u001b[22m"}}
[2024-01-23T20:17:45.965Z] Web / API server started at 127.0.0.1:4000
{"metadata":{"emulator":{"name":"ui"},"message":"Web / API server started at 127.0.0.1:4000\n"}}
[2024-01-23T20:17:45.966Z] Web / API server started at ::1:4000
{"metadata":{"emulator":{"name":"ui"},"message":"Web / API server started at ::1:4000\n"}}
i functions: Watching "/Users/REDACTED/functions" for Cloud Functions... {"metadata":{"emulator":{"name":"functions"},"message":"Watching \"REDACTED/dist/apps/functions\" for Cloud Functions..."}}
[2024-01-23T20:17:46.015Z] Validating nodejs source
[2024-01-23T20:17:46.619Z] > [functions] package.json contents: {
"name": "functions",
"description": "Firebase Functions package, auto generated by @simondotm/nx-firebase",
"scripts": {
"lint": "nx lint functions",
"build": "nx build functions",
"deploy": "firebase deploy --only functions --config firebase.json",
"logs": "firebase functions:log"
},
"engines": {
"node": "18"
},
"dependencies": {
"firebase": "9.19.1",
"firebase-admin": "11.11.1",
"firebase-functions": "4.6.0"
},
"devDependencies": {},
"private": true,
"main": "./src/index.js",
"type": "commonjs"
}
[2024-01-23T20:17:46.620Z] Building nodejs source
[2024-01-23T20:17:46.621Z] Failed to find version of module node: reached end of search path /Users/REDACTED/dist/apps/functions/node_modules
✔ functions: Using node@18 from host.
[2024-01-23T20:17:46.623Z] Could not find functions.yaml. Must use http discovery
[2024-01-23T20:17:46.632Z] Found firebase-functions binary at '/Users/REDACTED/node_modules/.bin/firebase-functions'
Serving at port 8322

[2024-01-23T20:17:47.433Z] Got response from /__/functions.yaml {"endpoints":{"temp":{"platform":"gcfv1","availableMemoryMb":null,"timeoutSeconds":null,"minInstances":null,"maxInstances":null,"ingressSettings":null,"serviceAccountEmail":null,"vpc":null,"secretEnvironmentVariables":[],"httpsTrigger":{},"entryPoint":"temp"}},"specVersion":"v1alpha1","requiredAPIs":[{"api":"cloudscheduler.googleapis.com","reason":"Needed for scheduled functions."}]}
✔ functions: Loaded functions definitions from source: test. {"metadata":{"emulator":{"name":"functions"},"message":"Loaded functions definitions from source: test."}}
✔ functions[us-central1-test]: http function initialized (http://127.0.0.1:5001/REDACTED/us-central1/test). {"metadata":{"emulator":{"name":"functions"},"message":"\u001b[1mhttp\u001b[22m function initialized (http://127.0.0.1:5001/REDACTED/us-central1/test)."}}
⚠ To enable function inspection, please run "npm i node@18.0.0 --save-dev" in your functions directory {"metadata":{"emulator":{"name":"functions"},"message":"To enable function inspection, please run \"npm i node@18.0.0 --save-dev\" in your functions directory"}}
[2024-01-23T20:17:47.500Z] [worker-pool] addWorker(~shared~) {"metadata":{"emulator":{"name":"functions"},"message":"[worker-pool] addWorker(~shared~)"}}
[2024-01-23T20:17:47.501Z] [worker-pool] Adding worker with key ~free~, total=1 {"metadata":{"emulator":{"name":"functions"},"message":"[worker-pool] Adding worker with key ~free~, total=1"}}
[2024-01-23T20:17:48.174Z] [runtime-status] [61149] Resolved module firebase-admin {"declared":true,"installed":true,"version":"11.11.1","resolution":"/Users/REDACTED/node_modules/firebase-admin/lib/index.js"} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [61149] Resolved module firebase-admin {\"declared\":true,\"installed\":true,\"version\":\"11.11.1\",\"resolution\":\"/Users/REDACTED/node_modules/firebase-admin/lib/index.js\"}"}}
[2024-01-23T20:17:48.175Z] [runtime-status] [61149] Resolved module firebase-functions {"declared":true,"installed":true,"version":"4.6.0","resolution":"/Users/REDACTED/node_modules/firebase-functions/lib/v1/index.js"} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [61149] Resolved module firebase-functions {\"declared\":true,\"installed\":true,\"version\":\"4.6.0\",\"resolution\":\"/Users/REDACTED/node_modules/firebase-functions/lib/v1/index.js\"}"}}
[2024-01-23T20:17:48.175Z] [runtime-status] [61149] 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] [61149] 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\"}]"}}
[2024-01-23T20:17:48.176Z] [runtime-status] [61149] Resolved module firebase-functions {"declared":true,"installed":true,"version":"4.6.0","resolution":"/Users/REDACTED/node_modules/firebase-functions/lib/v1/index.js"} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [61149] Resolved module firebase-functions {\"declared\":true,\"installed\":true,\"version\":\"4.6.0\",\"resolution\":\"/Users/REDACTED/node_modules/firebase-functions/lib/v1/index.js\"}"}}
[2024-01-23T20:17:48.297Z] [runtime-status] [61149] Checked functions.config() {"config":{}} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [61149] Checked functions.config() {\"config\":{}}"}}
[2024-01-23T20:17:48.297Z] [runtime-status] [61149] firebase-functions has been stubbed. {"functionsResolution":{"declared":true,"installed":true,"version":"4.6.0","resolution":"/Users/REDACTED/node_modules/firebase-functions/lib/v1/index.js"}} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [61149] firebase-functions has been stubbed. {\"functionsResolution\":{\"declared\":true,\"installed\":true,\"version\":\"4.6.0\",\"resolution\":\"/Users/REDACTED/node_modules/firebase-functions/lib/v1/index.js\"}}"}}
[2024-01-23T20:17:48.297Z] [runtime-status] [61149] Resolved module firebase-functions {"declared":true,"installed":true,"version":"4.6.0","resolution":"/Users/REDACTED/node_modules/firebase-functions/lib/v1/index.js"} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [61149] Resolved module firebase-functions {\"declared\":true,\"installed\":true,\"version\":\"4.6.0\",\"resolution\":\"/Users/REDACTED/node_modules/firebase-functions/lib/v1/index.js\"}"}}
[2024-01-23T20:17:48.298Z] [runtime-status] [61149] Resolved module firebase-admin {"declared":true,"installed":true,"version":"11.11.1","resolution":"/Users/REDACTED/node_modules/firebase-admin/lib/index.js"} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [61149] Resolved module firebase-admin {\"declared\":true,\"installed\":true,\"version\":\"11.11.1\",\"resolution\":\"/Users/REDACTED/node_modules/firebase-admin/lib/index.js\"}"}}
[2024-01-23T20:17:48.299Z] [runtime-status] [61149] Resolved module firebase-functions {"declared":true,"installed":true,"version":"4.6.0","resolution":"/Users/REDACTED/node_modules/firebase-functions/lib/v1/index.js"} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [61149] Resolved module firebase-functions {\"declared\":true,\"installed\":true,\"version\":\"4.6.0\",\"resolution\":\"/Users/REDACTED/node_modules/firebase-functions/lib/v1/index.js\"}"}}
[2024-01-23T20:17:48.299Z] [runtime-status] [61149] firebase-admin has been stubbed. {"adminResolution":{"declared":true,"installed":true,"version":"11.11.1","resolution":"/Users/REDACTED/node_modules/firebase-admin/lib/index.js"}} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [61149] firebase-admin has been stubbed. {\"adminResolution\":{\"declared\":true,\"installed\":true,\"version\":\"11.11.1\",\"resolution\":\"/Users/REDACTED/node_modules/firebase-admin/lib/index.js\"}}"}}
[2024-01-23T20:17:48.542Z] [runtime-status] [61149] Functions runtime initialized. {"cwd":"/Users/REDACTED/dist/apps/functions","node_version":"18.5.0"} {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [61149] Functions runtime initialized. {\"cwd\":\"/Users/REDACTED/dist/apps/functions\",\"node_version\":\"18.5.0\"}"}}
[2024-01-23T20:17:48.542Z] [runtime-status] [61149] Listening to port: /var/folders/31/dstnktz109vcsd3y_h0mrncm0000gn/T/fire_emu_09eccfd4af2f208e.sock {"metadata":{"emulator":{"name":"functions"},"message":"[runtime-status] [61149] Listening to port: /var/folders/31/dstnktz109vcsd3y_h0mrncm0000gn/T/fire_emu_09eccfd4af2f208e.sock"}}
[2024-01-23T20:17:48.623Z] [worker-~free~-12d0cb13-d8d5-4088-a6fe-1b3742975a9a]: IDLE {"metadata":{"emulator":{"name":"functions"},"message":"[worker-~free~-12d0cb13-d8d5-4088-a6fe-1b3742975a9a]: IDLE"}}

┌─────────────────────────────────────────────────────────────┐
│ ✔ All emulators ready! It is now safe to connect your app. │
│ i View Emulator UI at http://127.0.0.1:4000/ │
└─────────────────────────────────────────────────────────────┘

┌───────────┬──────────────┬─────────────────────────────────┐
│ Emulator │ Host:Port │ View in Emulator UI │
├───────────┼──────────────┼─────────────────────────────────┤
│ Functions │ 0.0.0.0:5001 │ http://127.0.0.1:4000/functions │
└───────────┴──────────────┴─────────────────────────────────┘
Emulator Hub running at 127.0.0.1:4400
Other reserved ports: 4500

Issues? Report them at https://github.com/firebase/firebase-tools/issues and attach the *-debug.log files.
```

Connecting via VSCode with the following launch.json configuration fails. The "connecting" panel shows for a few seconds then disappears without any error message.
```
{
"name": "ATTACH functions:start",
"type": "node",
"request": "attach",
"cwd": "${workspaceRoot}",
"port": 9229,
"resolveSourceMapLocations": [
"${workspaceFolder}/**",
"!**/node_modules/**",
"!node:internal/**"
]
}
```

Telnet to port 9229 fails:
```
> telnet localhost 9229
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host
```

lsof (on macOS) shows no open sockets on port 9229:
```
> lsof -ti tcp:9229
# no output
> lsof -ti udp:9229
# no output
# To verify lsof is working, here's what I get for another server on port 3000:
> lsof -ti tcp:3000
5061
```