Re: [Emacs-diffs] /srv/bzr/emacs/trunk r108836: Cleanup basic buffer management.

[Juanma Barranquero]

Before 108836, this worked:

(setq-default major-mode (lambda () ...))
(find-file ...)

Now it fails; major-mode gets assigned some bogus value.

This is what I was using, BTW:

  (setq-default major-mode
                (lambda ()
                  (if buffer-file-name
                      (fundamental-mode)
                    (let ((buffer-file-name (buffer-name)))
                      (set-auto-mode)))))

but just

  (setq-default major-mode (lambda () (fundamental-mode)))

is enough to show the problem.

Setting major-mode to a lambda expression is undocumented, and the
workaround for my problem is just adding a defun, so this is not
exactly a bug report. But perhaps you'll want to check whether the
change has other subtle implications.

  Juanma