[Linux] fall-back to cmd line login broken in v1.0.18-20170206170059+4931777: ERROR Failed to get getpin greeting: EOF

Situation:

• Machine A - headless linux with v1.0.18-20170206170059+4931777
• Machine B - Windows (without running X-server)

This morning I tried to login on one of my linux machines and received the following error:
▶ ERROR Failed to get getpin greeting: EOF

I thought that maybe I needed to update, so I did. This resulted in:
▶ WARNING Restarting after upgrade; service is running v1.0.18-20170201170258+dc90cf4, while v1.0.18-20170206170059+4931777 is available
▶ INFO Restarting service...
▶ INFO Forking background server with pid=15259
▶ ERROR Failed to get getpin greeting: EOF

As it turns out, apparently I can NOT login if I don't have an X-server running with the current version! Using ssh without X-forwarding and running run_keybase I am able to login.

In some previous versions it didn't behave like that. When I had accidentally forgotten to start Xming or VcXrv (on Machine B), keybase would fall-back to the command line.
Giving me:
Please enter the Keybase passphrase for rowena (12+ characters):

I'm not sure at which version it broke as I trust my headless box enough to leave keybase logged in on it.

I cleared the logs before making a clean attempt, I did NOT clear the caches in ~/.config/Keybase/
my log id: b5c5899ec4b2e9dd892dff1c

Reproduce the login attempt on a headless Linux machine without X forwarding, using the reported version and the run_keybase command. Start with the log identified by b5c5899ec4b2e9dd892dff1c and compare the behavior with and without an X server; done means command-line passphrase fallback works instead of failing with the getpin greeting EOF.