When `unload-feature' looks in hooks for functions that it's going to
unload, it doesn't seem to look in buffer-local values, other than for
the current buffer.
Evalling the code in try-foo.el below loads then unloads foo.el. It
gets an error
void-function foo-message
where I hoped unload-feature might have purged that `foo-message' from
`after-change-functions'.
I suppose looking in all buffers is more work for unload-feature, but
would be a good protection against bad things happening later. I expect
some of the standard hooks like `after-change-functions' are used
buffer-local most of the time.
If instead it's an intentional omission (to save work) then the elisp
manual and the docstring could note it so that modes or packages using
buffer-local hook settings can take steps to undo.
foo.el
Description: application/emacs-lisp
try-foo.el
Description: application/emacs-lisp
In GNU Emacs 23.1.1 (i486-pc-linux-gnu, GTK+ Version 2.16.5) of 2009-09-14 on raven, modified by Debian configured using `configure '--build=i486-linux-gnu' '--host=i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs23:/etc/emacs:/usr/local/share/emacs/23.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.1/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.1/leim' '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2' 'LDFLAGS=-g' 'CPPFLAGS='' Important settings: value of $LC_ALL: nil value of $LC_COLLATE: nil value of $LC_CTYPE: nil value of $LC_MESSAGES: nil value of $LC_MONETARY: nil value of $LC_NUMERIC: nil value of $LC_TIME: nil value of $LANG: en_AU value of $XMODIFIERS: nil locale-coding-system: iso-latin-1-unix default-enable-multibyte-characters: t
--- End Message ---