Aidan Kehoe writes: > > > * mule/mule-cmds.el (finish-set-language-environment): > > > Implement error-sequence-coding-system. > > > > Please call this "invalid-character-coding-system" or something like > > that. > > Why do you find that clearer? Several reasons. "Error" is a signal in Lisp, but no error will be signaled here. "Error sequence" could be almost anything unexpected; people encountering these names will not necessarily have the context to realize that they refer to invalid encoding sequences. Even in that context, errors will by definition not be coding systematic, so it's sort of an oxymoron. In fact, my original thought was that e-s-c-s was the coding system that threw the error in the first place.