mail-fetch-field and gnus-treat-hide-boring-headers problem

[Klaus Zeitler]

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In GNU Emacs 21.2.1 (sparc-sun-solaris2.8, Motif Version 2.1.0)
 of 2002-06-24 on sfsw81
configured using `configure  --with-gcc 
--prefix=/vol/freeware/SunOS-5.8/emacs/21.2 
--sharedstatedir=/vol/freeware/SunOS-5.8/emacs/21.2/share 
--with-x-toolkit=motif --x-includes=/usr/openwin/include:/usr/local/gnu/include 
--x-libraries=/usr/openwin/lib:/usr/local/gnu/lib --with-pop'
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: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

when headers like e.g. reply-to are hidden in gnus
(with gnus-treat-hide-boring-headers set to 'head),
mail-fetch-field returns a garbage mail address.

e.g. here's the start of the Gnus article buffer of an email
with the header line 'Reply-to: rms@gnu.org' being hidden i.e. invisible

--- snip ---
From: Richard Stallman <rms@gnu.org>
Subject: Re: my Emacs is broken
To: kzeitler@lucent.com
Date: Wed, 06 Nov 2002 23:48:56 -0500
Reply-to: rms@gnu.org

        Richard> That is peculiar.  If SIGIO works, then x_sync ought to
--- snip ---


for this email calling (mail-fetch-field "reply-to") returns
(if mail is not narrowed to the header):
"       Richard> That is peculiar.  If SIGIO works, ..."

and it returns (with mail narrowed to header):
"Reply-to: rms@gnu.org
"

instead of the expected: "rms@gnu.org"

I know the doc string says:
"The buffer is expected to be narrowed to just the header of the message."
but it normally works also without narrowing. And with a hidden header it
doesn't work properly in either case.


mail-fetch-field uses re-search-forward and then
buffer-substring-no-properties to extract the addresses.
Don't know how this is supposed to work for invisible text.

Maybe the problem is caused by the way gnus makes text invisible
or this is a bug in mail-fetch-field.


Klaus



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