Travis with Firebase deploy TypeError: this.stream.clearLine is not a function

Question

I am trying to build & deploy a NodeJs + Python app with Travis.

This is approximately the folder structure (everything belongs to the same repo)

Answer 1

Just had the same issue, it seems that some progress bar is making some issues. Try to disable it in non interactive mode:

after_success:
  - firebase deploy --token $FIREBASE_TOKEN --non-interactive

It solved my issue, hope it helps.