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Re: [bug-patch] Using wrong filename when adding new file

From: Andreas Gruenbacher
Subject: Re: [bug-patch] Using wrong filename when adding new file
Date: Tue, 22 Dec 2009 15:50:05 +0100
User-agent: KMail/1.12.2 (Linux/; KDE/4.3.1; i686; ; )

On Tuesday 22 December 2009 12:18:01 Tim Waugh wrote:
> I reported this at savannah.gnu.org but I'm not sure if that's the
> correct place.

Yes, this list or the bug tracker are both fine.

> With patch-2.6, this sequence of commands give the wrong output:
> rm -rf a b 
> mkdir a b 
> touch a/file 
> echo content > b/file.new 
> diff -u a/file b/file.new > test.patch 
> mkdir c 
> cd c 
> patch -p1 -i ../test.patch 
> ls
> Basically, when a unified context diff looks like:
> --- a/file
> +++ b/file.new
> @@ -0,0 +1 @@
> +content
> and the patch is applied in an empty directory, the filename from the
> '+++' line is used when it should be the filename from the '---' line
> instead.  "a/file" is a "better" name than "b/file.new", going by the
> POSIX algorithm.
> This behaviour is new in patch-2.6.

I can reproduce, and this indeed looks like a bug introduced in 2.6.

Thanks for debugging and reporting!


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