GNU bug report logs - #6285
a possible bug of "sort -un", it is definitely not caused by language setting

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

From: daimh <daimh <at> umich.edu>
To: bug-coreutils <at> gnu.org
Subject: a possible bug of "sort -un", it is definitely not caused by
	language setting
Date: Thu, 27 May 2010 16:30:11 -0400

Hi,

	
	echo -e "3\n\n0"|sort -un


	0 is missing from output, is this a possible bug?


Best,
Manhong

Message #8 received at 6285 <at> debbugs.gnu.org (full text, mbox):

From: Eric Blake <eblake <at> redhat.com>
To: daimh <daimh <at> umich.edu>
Cc: 6285 <at> debbugs.gnu.org
Subject: Re: bug#6285: a possible bug of "sort -un",	it is definitely not
	caused by language setting
Date: Thu, 27 May 2010 16:52:19 -0600

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

On 05/27/2010 02:30 PM, daimh wrote:
> Hi,
> 
> 	
> 	echo -e "3\n\n0"|sort -un

'echo -e' is inherently non-portable; you should get in the habit of
using printf(1) instead.

> 
> 
> 	0 is missing from output, is this a possible bug?

Thanks for the report.  However, I don't think it is a bug.  The empty
line, when forced to take on a numeric value, is equivalent to 0.  And
since you specified unique entries only, sort only printed the empty
line (the first of the two matching lines that it encountered).

-- 
Eric Blake   eblake <at> redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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Message #11 received at 6285 <at> debbugs.gnu.org (full text, mbox):

From: daimh <daimh <at> umich.edu>
To: Eric Blake <eblake <at> redhat.com>
Cc: 6285 <at> debbugs.gnu.org
Subject: Re: bug#6285: a possible bug of "sort -un",	it is definitely not
	caused by language setting
Date: Fri, 28 May 2010 09:00:31 -0400

Hi Eric,


	That explained it, thanks a lot for your help!


Best,
Manhong
On Thu, 2010-05-27 at 16:52 -0600, Eric Blake wrote:
> On 05/27/2010 02:30 PM, daimh wrote:
> > Hi,
> > 
> > 	
> > 	echo -e "3\n\n0"|sort -un
> 
> 'echo -e' is inherently non-portable; you should get in the habit of
> using printf(1) instead.
> 
> > 
> > 
> > 	0 is missing from output, is this a possible bug?
> 
> Thanks for the report.  However, I don't think it is a bug.  The empty
> line, when forced to take on a numeric value, is equivalent to 0.  And
> since you specified unique entries only, sort only printed the empty
> line (the first of the two matching lines that it encountered).
> 

Message #16 received at 6285-done <at> debbugs.gnu.org (full text, mbox):

From: Bob Proulx <bob <at> proulx.com>
To: daimh <daimh <at> umich.edu>
Cc: 6285-done <at> debbugs.gnu.org
Subject: Re: bug#6285: a possible bug of "sort -un", it is definitely not
	caused by language setting
Date: Fri, 28 May 2010 13:41:04 -0600

daimh wrote:
> Hi Eric,
> 	That explained it, thanks a lot for your help!
> Best,
> Manhong

Thank you for letting us know.  With that information I am going to
close the bug report with this message.

Bob

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