Subject: `documentation' fails with void-function help-split-fundoc, due to advice

From: Glenn Morris <[email-masked]>
Date: Wed, 12 Mar 2014 16:04:45 -0400

Package: emacs
Version: 24.3.50

Current trunk on GNU/Linux.

emacs -Q
(documentation 'rename-buffer)
  ->  void-function help-split-fundoc

The error comes from advice--make-docstring.

nadvice.el could autoload help-split-fundoc. Since nadvice.el is
preloaded, that's equivalent to sticking an autoload cookie on
help-split-fundoc. Which might be a good thing, since several files
autoload it manually.

Or advice--make-docstring could require help-fns.

PS Presumably the lispref statement "Emacs's own source files should not
put advice on functions in Emacs." no longer applies, since nadvice.el
is preloaded and eg simple.el uses it.