bug#37957: closed (BibTeX dialect not set if local variables disabled)

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Your message dated Wed, 2 Dec 2020 13:54:00 -0600
with message-id <61656.7703.604711.24519@gargle.gargle.HOWL>
and subject line Re: bug#37957: BibTeX dialect not set if local variables 
disabled
has caused the debbugs.gnu.org bug report #37957,
regarding BibTeX dialect not set if local variables disabled
to be marked as done.

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37957: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=37957
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--- Begin Message --- Subject: BibTeX dialect not set if local variables disabled Date: Mon, 28 Oct 2019 09:44:15 +0000

From "emacs -Q",
* Set the variable 'enable-local-variables' to nil.
* Visit a BibTeX (*.bib) file.
* Wait one minute or eval (bibtex-parse-buffers-stealthily).

Lisp error: (wrong-type-argument number-or-marker-p nil)
Backtrace:
  1+(nil)
  (buffer-substring-no-properties (1+ (match-beginning bibtex-type-in-head)) (match-end bibtex-type-in-head))
  bibtex-type-in-head()
  (assoc-string (bibtex-type-in-head) bibtex-entry-alist t)
  [...]
  bibtex-parse-keys(t)
  bibtex-parse-buffers-stealthily()
  [...]

On visiting a BibTeX file, if enable-local-variables is nil, 'bibtex-set-dialect' doesn't get called. This causes errors later on. For example, when 'bibtex-parse-buffers-stealthily' is called, we get the above error, because 'bibtex-entry-head' has not been set. Glancing at the history of  'bibtex-major-mode', this commit seems a likely candidate:

ace88aa20f32b298e7f2e8e6115b5661504f8724
Author: Roland Winkler <winkler@gnu.org>
AuthorDate: Sat Jan 28 12:06:10 2012 -0600

lisp/textmodes/bibtex.el: allow bibtex-dialect as file-local variable (Bug#10254)

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> Subject: 
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> Re: bug#37957: BibTeX dialect not set if local variables disabled
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> Date: 
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> Wed, 2 Dec 2020 13:54:00 -0600
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> Fixed with commit 40f42945ed1ee76c16ee4c58c7f37a412a3aa407.
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