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Subject:	Re: bug with grep 3.0.2 in cygwin 3.0.7
To:	cygwin AT cygwin DOT com
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From:	Eliot Moss <moss AT cs DOT umass DOT edu>
Message-ID:	<ce0890bd-f1b1-5a77-4999-9793d9a0df25@cs.umass.edu>
Date:	Wed, 28 Aug 2019 08:44:23 -0400
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On 8/28/2019 3:16 AM, akiki AT free DOT fr wrote:
> Hi,
> I encounter some problem with grep option -E on cygwin 3.0.7
> 
> 
> echo "a^b" | grep "a^b" #answer a^b ie it's OK
> but
> echo "a^b" | grep -E "a^b" #answer nothing " for me it's KO
> 
> 
> I have to backslash ^ to be OK like : grep -E 'a\^b'
> 
> 
> Is-it a bug ?
> I don't know if all versions of cygwin and grep are concerned.

 From my reading of the man page, it's either a program bug or a
documentation bug.  It could well be the latter since -E extended
regular expressions require a number of other metacharacters to
be backslash quoted.  However, the documentation does not mention
the ^ metacharacter.

Regards - EM

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