Getting this error when cider-connecting in cider 0.9.1, emacs 24.4.1.

nREPL: Establishing direct connection to localhost:52489 ...
nREPL: Direct connection established
cider-repl--emit-interactive-output: Wrong type argument: integer-or-marker-p, nil

Would like to submit a bug about this, but I'm not sure what the first steps are in logging or diagnosing this.

see the troubleshooting section in the README and CONTRIBUTING.md

in your case it will probably be nice to step through the problematic function to see the exact point of failure there