GNU bug report logs - #79319
[PATCH] * lisp/vc/vc-dispatcher.el (vc-buffer-sync): Check buffer-file-name

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Lin Sun <sunlin7 <at> hotmail.com>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>
Subject: [PATCH] * lisp/vc/vc-dispatcher.el (vc-buffer-sync): Check
 buffer-file-name 
Date: Tue, 26 Aug 2025 19:33:58 +0000

[Message part 1 (text/plain, inline)]

Hi,

I got an error when try to revert a buffer:
vc-revert: Wrong type argument: stringp, nil

Here is the backtrace:
Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  vc-buffer-sync(nil)
  vc-revert()
  funcall-interactively(vc-revert)
  command-execute(vc-revert)


It caused by reverting a buffer which has no file name (like create a buffer but not saving it).
 
This patch will check the `` bebuffer-file-name` before call subsequent function.
Please help review the patch, thanks

Best Regards
Lin

[0001-lisp-vc-vc-dispatcher.el-vc-buffer-sync-Check-buffer-file-name.patch (text/x-patch, attachment)]

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