Travis mysql:5.7 runs timing out during build, after "debconf: falling back to frontend: Teletype"

[edmorley]

eg:
https://travis-ci.org/docker-library/mysql/jobs/66373323

...
Setting up mysql-community-server (5.7.7-rc-1debian7) ...
debconf: unable to initialize frontend: Dialog
debconf: (TERM is not set, so the dialog frontend is not usable.)
debconf: falling back to frontend: Readline
debconf: unable to initialize frontend: Readline
debconf: (This frontend requires a controlling tty.)
debconf: falling back to frontend: Teletype

No output has been received in the last ... minutes, this potentially indicates a stalled build or something wrong with the build itself.

The build has been terminated

[tianon]

This is since fixed. 😄 👍