Michael Albinus writes: > Stefan Monnier writes: >>> - The function command-completion-default-include-p checks whether >>> completion-predicate is functionp. >> I think this is *also* needed, tho a better option is >> `with-demoted-errors` since no matter what error is signal'd we don't >> want it to prevent `M-x` from doing its job. > Yes. Like so? Or do we want the safety net higher up, e.g. in read-extended-command or its callers?