Where can I find firebase-debug.log to understand why emulators did not cleanly shut down?

Question

I am using firebase emulators:start to start firebase emulators. When shutting it down, through Ctrl+C, it tells me it didn't shut down correctly and that I need to consult firebase-debug.log which is nowhere to be found. I suspect it should be in functions/ folder where everything else related to cloud functions live, but it's not there.

i  emulators: Shutting down emulators.
i  hub: Stopping emulator hub
i  ui: Stopping Emulator UI
⚠  Emulator UI has exited upon receiving signal: SIGINT
i  logging: Stopping Logging Emulator
i  functions: Stopping Functions Emulator
i  firestore: Stopping Firestore Emulator
i  database: Stopping Database Emulator
⚠  emulators: emulators failed to shut down cleanly, see firebase-debug.log for details.

The problem is there is no firebase-debug.log to be found. Where can I find this debug file? See below contents of functions folder:

Answer 1

firebase-debug.log is created in the root directory, one level up from the functions directory, beside the firebase.json file.

You can also launch the firebase with --debug flag firebase --debug emulators:start, in this case all debug messages will be printed into the console output.