GNU bug report logs - #6326
23.1.95; `vc-diff' sometimes reports wrong diff status

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Message #11 received at 6326 <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> gnu.org>
To: Dan Nicolaescu <dann <at> gnu.org>
Cc: 6326 <at> debbugs.gnu.org, Markus Triska <markus.triska <at> gmx.at>
Subject: Re: bug#6326: 23.1.95; `vc-diff' sometimes reports wrong diff status
Date: Mon, 29 Oct 2012 19:13:12 +0800

Dan Nicolaescu <dann <at> gnu.org> writes:

>> When I open (in emacs -Q) a file under "git" version control and:
>>
>>    1) view its log with: C-x v l
>>    2) open any previous revision, for example: n n n f
>>    3) save the previous revision under a different name:
>>       C-x C-w difrev.txt RET
>>    4) on difrev.txt, run `vc-diff' with: C-x v =
>>
>> it unexpectedly says: "No changes between working revision and
>> workfile". It SHOULD say that the file is NOT under version control.
>> Also other operations like C-x v l should say this but currently don't
>> (C-x v l instead unexpectedly displays the log of the original file).
>
> This because `vc-parent-file' still points to the original file. 
> Maybe `vc-file-clearprops' (called from `write-file') should also
> reset `vc-parent-file'.

I think you're right.  Done in trunk.

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