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From: "Daniel Einspanjer" <deinspanjer AT gmail DOT com>
Subject:  Problem with grep -Fwf (version 2.5.1a-1 and 2.5.1a-2)
Date:  Fri, 28 Jul 2006 13:53:32 -0400
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Using the following files both of which had dos2unix run on them to be sure 
there were no line-ending issues:

===== data.txt =======
abc
defghi
======================

===== filter.txt =====
abc
deghi
======================

These commands work as expected:
$ fgrep -f filter.txt data.txt
$ tail -1 data.txt | fgrep -wf filter.txt

But this command fails to return ghi:
$ fgrep -wf filter.txt data.txt
So it seems that after a match is discarded because it is not a full word 
(due to the -w flag), subsequent full word matches are also discarded.

I've tested this with the grep 2.5.1 installed on a recent Gentoo GNU/Linux 
machine and it behaves properly so I am guessing it might be a problem 
specific to the cygwin port.  I have not worked with Cygwin source yet, so 
I'm reporting the problem, and if I finish with the work tasks that surfaced 
the problem, I'll be happy to dig into the source and attempt to create a 
patch, but I'm hoping there might be someone out there that can quickly 
determine the problem and solution. :)
-- 
Daniel Einspanjer 



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