SSH to Bitbucket.org succeeds authentication but immediately closes connection

[gmerendino]

I'm trying to test my SSH connection to Bitbucket, but the session closes right after authentication.

Here's the relevant output:

text

Authenticated to bitbucket.org ([185.166.143.49]:22) using "publickey".
debug1: channel 0: free: client-session, nchannels 1
Connection to bitbucket.org closed by remote host.
debug1: Exit status -1

The key is accepted, no explicit error is shown, but the connection is terminated by the remote host.
This happens even with ssh -Tv git@bitbucket.org.

Any idea what could cause this?
Thanks.