I was finishing a #Clojure TDD session with one of my employees and got an obscure Cyclical Keys error. Googled and found it exactly -- issue closed! Wait... yesterday?! https://github.com/clojure-emacs/cider/issues/3195
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"restart your REPL" is my new "restart your computer" for troubleshooting, apparently.
@worldsendless It's thankfully a bit less disruptive.