GNU bug report logs - #64844
29.1; M-x normal-mode is a better suggestion than M-x revert-buffer on new unsaved buffer

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#64844: closed (29.1; M-x normal-mode is a better suggestion
 than M-x revert-buffer on new unsaved buffer)
Date: Sun, 30 Jul 2023 07:13:02 +0000

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Your message dated Sun, 30 Jul 2023 10:12:33 +0300
with message-id <83pm49lvoe.fsf <at> gnu.org>
and subject line Re: bug#64844: 29.1; M-x normal-mode is a better suggestion than M-x revert-buffer on new unsaved buffer
has caused the debbugs.gnu.org bug report #64844,
regarding 29.1; M-x normal-mode is a better suggestion than M-x revert-buffer on new unsaved buffer
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
64844: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=64844
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Contact help-debbugs <at> gnu.org with problems

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From: Van Ly <van.ly <at> sdf.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.1;
 M-x normal-mode is a better suggestion than M-x revert-buffer on new
 unsaved buffer
Date: Tue, 25 Jul 2023 06:47:56 GMT

[Message part 3 (text/plain, inline)]

A new buffer to a new file path before first save with adjustment to
mode kind and comment start prefix convention triggers the suggestion to

 M-x revert-buffer

for change to take effect, which turns out to be incorrect for a
buffer never before saved to file.

 M-x normal-mode

does the job correctly.

Steps to recreate

 1. run, emacs -Q -nw
 2. load theme womat for readability, dark blue on black is unreadable on input buffer below mode line
 3. open blank buffer to file without saving, /tmp/x
 4. type at top of file, # This comment line is left intentionally blank. -*- prog -*-
 5. add prop line, M-x add-file-local-variable-prop-line
 6. enter, comment-start: , "# "
 7. *Messages* buffer says, For this change to take effect revisit file using M-x revert-buffer
 8. *Messages* says, revert-buffer-insert-file-contents--default-function: Cannot revert nonexistent file /tmp/x
 9. M-x normal-mode ; does the job suggested at 7. above

[x-bug-report.text (application/octet-stream, attachment)]

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From: Eli Zaretskii <eliz <at> gnu.org>
To: van.ly <at> sdf.org
Cc: 64844-done <at> debbugs.gnu.org
Subject: Re: bug#64844: 29.1;
 M-x normal-mode is a better suggestion than M-x revert-buffer on new
 unsaved buffer
Date: Sun, 30 Jul 2023 10:12:33 +0300

> Cc: 64844 <at> debbugs.gnu.org
> Date: Tue, 25 Jul 2023 17:53:19 +0300
> From: Eli Zaretskii <eliz <at> gnu.org>
> 
> > Date: Tue, 25 Jul 2023 06:47:56 GMT
> > From:  Van Ly via "Bug reports for GNU Emacs,
> >  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> > 
> > A new buffer to a new file path before first save with adjustment to
> > mode kind and comment start prefix convention triggers the suggestion to
> > 
> >  M-x revert-buffer
> > 
> > for change to take effect, which turns out to be incorrect for a
> > buffer never before saved to file.
> > 
> >  M-x normal-mode
> > 
> > does the job correctly.
> 
> Thanks, should be fixed now on the master branch.

No further comments, so I assume the problem is indeed solved, and I'm
closing this bug.

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