GNU bug report logs - #59962
29.0.60; vc commands fail in diff-mode

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Message #8 received at 59962 <at> debbugs.gnu.org (full text, mbox):

From: Daniel Martín <mardani29 <at> yahoo.es>
To: Sven Joachim <svenjoac <at> gmx.de>
Cc: 59962 <at> debbugs.gnu.org
Subject: Re: bug#59962: 29.0.60; vc commands fail in diff-mode
Date: Sun, 11 Dec 2022 17:46:47 +0100

Sven Joachim <svenjoac <at> gmx.de> writes:

> As a distribution maintainer, I find myself working with
> version-controlled patches which Emacs visits in diff-mode.
> Unfortunately, there is a bad interaction between diff-mode and vc,
> which makes all vc commands fail.  This is what I got on C-x v l:
>
> ,----
> | Debugger entered--Lisp error: (wrong-type-argument arrayp nil)
> |   file-truename(nil)
> |   find-buffer-visiting(nil)
> |   vc-buffer-sync-fileset((Git (nil nil nil nil) nil nil patch) t)
> |   vc-diff(nil t)
> |   funcall-interactively(vc-diff nil t)
> |   call-interactively(vc-diff nil nil)
> |   command-execute(vc-diff)
> `----
>

Could you detail the steps to reproduce this issue (preferably from
emacs -Q)?  I've tried C-x v l on a few Git-version-controlled .patch
files (in Diff mode) but I couldn't reproduce the error.  Thanks.

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