rancid hangs due to expect, ssh, or cisco?

[Zhang, Anchi]

My repeated tests show that the problem is related to the length of the
config.  The Rancid collection that I mailed you privately was successful
because I did

UU-Cisco-gw(config)# no ntp server 158.81.250.130

before I ran rancid -d <hostname>.  In fact, shortening the config by just one
line, any line, would render Rancid successful.

Anchi