Opening new alchemist-refcard: Wrong type argument: listp, t

[jmitchell]

When I'm in alchemist-mode (Alchemist version: 1.9.0snapshot (package: 20161122.2304)) and create a new alchemist-refcard buffer using C-c a h r the buffer opens but I get the error Wrong type argument: listp, t.

If I press the same key chord while the buffer is still open I don't get the same error any more. To reproduce it I have to explicitly kill the buffer first (pressing q in the buffer isn't enough; that just quits the window) or restart Emacs.

Emacs says the error occurs in tabulated-list-print, which is the last function called by alchemist-refcard-mode. I'm not sure, but I suspect it has something to do with this last entry.