GNU bug report logs - #64821
30.0.50; write-region errs when overwriting an already open file

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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#64821: closed (30.0.50; write-region errs when overwriting an
 already open file)
Date: Tue, 25 Jul 2023 12:19:02 +0000

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Your message dated Tue, 25 Jul 2023 15:19:13 +0300
with message-id <831qgwqj3y.fsf <at> gnu.org>
and subject line Re: bug#64821: 30.0.50; write-region errs when overwriting an already open file
has caused the debbugs.gnu.org bug report #64821,
regarding 30.0.50; write-region errs when overwriting an already open file
to be marked as done.

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


-- 
64821: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=64821
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Ihor Radchenko <yantar92 <at> posteo.net>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.0.50; write-region errs when overwriting an already open file
Date: Mon, 24 Jul 2023 07:12:00 +0000

Consider the following reproducer:

1. emacs -Q
2. Evaluate the following in scratch buffer

(with-temp-buffer
  (insert "test")
  (write-region nil nil "/tmp/1.txt"))

3. Open /tmp/1.txt
4. Evaluate the above sexp multiple times
5. Observe

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  expand-file-name(nil)
  userlock--check-content-unchanged("/tmp/1.txt")
  userlock--ask-user-about-supersession-threat("/tmp/1.txt")
  write-region(nil nil "/tmp/1.txt")
  (progn (insert "test") (write-region nil nil "/tmp/1.txt"))
  (unwind-protect (progn (insert "test") (write-region nil nil "/tmp/1.txt")) (and (buffer-name temp-buffer) (kill-buffer temp-buffer)))
  (save-current-buffer (set-buffer temp-buffer) (unwind-protect (progn (insert "test") (write-region nil nil "/tmp/1.txt")) (and (buffer-name temp-buffer) (kill-buffer temp-buffer))))
  (let ((temp-buffer (generate-new-buffer " *temp*" t))) (save-current-buffer (set-buffer temp-buffer) (unwind-protect (progn (insert "test") (write-region nil nil "/tmp/1.txt")) (and (buffer-name temp-buffer) (kill-buffer temp-buffer)))))
  (progn (let ((temp-buffer (generate-new-buffer " *temp*" t))) (save-current-buffer (set-buffer temp-buffer) (unwind-protect (progn (insert "test") (write-region nil nil "/tmp/1.txt")) (and (buffer-name temp-buffer) (kill-buffer temp-buffer))))))
  elisp--eval-last-sexp(nil)
  eval-last-sexp(nil)
  funcall-interactively(eval-last-sexp nil)
  command-execute(eval-last-sexp)

Expected: No error is thrown.

In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.38, cairo version 1.17.8) of 2023-07-21 built on localhost
Repository revision: 7f77120683d6f150e61e11b41d75ba16ee5210a4
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101008
System Description: Gentoo Linux


-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>

[Message part 3 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: Ihor Radchenko <yantar92 <at> posteo.net>
Cc: 64821-done <at> debbugs.gnu.org
Subject: Re: bug#64821: 30.0.50; write-region errs when overwriting an
 already open file
Date: Tue, 25 Jul 2023 15:19:13 +0300

> From: Ihor Radchenko <yantar92 <at> posteo.net>
> Cc: 64821 <at> debbugs.gnu.org
> Date: Tue, 25 Jul 2023 08:16:23 +0000
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> >> Expected: No error is thrown.
> >
> > Thanks, should be fixed now on the master branch.
> 
> I confirm the fix. Thanks!

Thanks for testing; closing the bug.

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