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bug#9214: `fundamental-mode-hook' not run when setting up `fundamental-m

From: Štěpán Němec
Subject: bug#9214: `fundamental-mode-hook' not run when setting up `fundamental-mode' under certain circumstances; Info documentation incorrect
Date: Mon, 01 Aug 2011 12:22:09 +0200


"GNU Emacs (i686-pc-linux-gnu) of 2011-01-15 on headley"

Steps to reproduce:
emacs -Q

(defvar f-m-hook-run 0)

(add-hook 'fundamental-mode-hook
          (lambda () (setq f-m-hook-run (1+ f-m-hook-run))))

(with-current-buffer (get-buffer-create "f-m-test-buf")
;=> fundamental-mode

;=> 0

(with-current-buffer (get-buffer-create "f-m-test-buf")
;=> fundamental-mode

;=> 1

A related problem: (info "(elisp)Auto Major Mode") states:

 -- Command: fundamental-mode
     Fundamental mode is a major mode that is not specialized for
     anything in particular.  Other major modes are defined in effect
     by comparison with this one--their definitions say what to change,
     starting from Fundamental mode.  The `fundamental-mode' function
     does _not_ run any mode hooks; you're not supposed to customize
     it.  (If you want Emacs to behave differently in Fundamental mode,
     change the _global_ state of Emacs.)

Which is incorrect, as the recipe above shows (the hook _is_ run when
`fundamental-mode' is called explicitly).


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