bug#4146: 23.1.50; c-file-style in buffer local variables does not work!

Jamie Lokier <[email protected]> writes:

  > Hi,
  > 
  > 
  > In GNU Emacs 23.1.50.1 (i486-pc-linux-gnu, GTK+ Version 2.16.1)
  >  of 2009-07-31 on lansones, modified by Debian
  >  (emacs-snapshot package, version 1:20090730-1~jaunty1)
  >  (= the Ubuntu-PPA Jaunty package at the time of writing)
  > 
  > In theory, if you put this at the top of a file, you'd expect C
  > indentation style to be Linux style instead of the default GNU style
  > (it's just an example):
  > 
  > -*- c-file-style: "linux" -*-
  > 
  > I have just opened a fresh new emacs-23.1.50.1 with "emacs -Q -nw"
  > and then opened a file called foo.c containing that line.
  > 
  > What I found is that the variable c-file-style is set to "linux" and
  > is buffer-local, but it does not have the effect of setting the C
  > indentation style.
  > 
  > This is the output of C-h v c-file-style RET from that buffer:
  > 
  >     c-file-style is a variable defined in `cc-vars.el'.
  >     Its value is "linux"
  >     Local in buffer foo.c; global value is nil
  > 
  >       Automatically becomes buffer-local when set in any fashion.
  >       This variable is a file local variable.
  >       This variable is safe as a file local variable if its value
  >       satisfies the predicate `string-or-null-p'.
  > 
  > The problem is that the variable is set correctly, but the intended
  > effect of setting the C indentation style does not happen.

I can confirm this.
This is a regression, it works as expected in emacs-22.3.

IMO this is the type of bad bug that warrants making a dot release as
soon as it's fixed.