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bug#26832: bug on grep 3.0

From: 川崎 正貴
Subject: bug#26832: bug on grep 3.0
Date: Mon, 8 May 2017 16:56:31 +0900
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 
I found a bug on grep 3.0 on 64bit cygwin.
It seems that '\/' before '$' causes probrems.

grep 2.25(correct)
>echo rr/| grep '^.*\/$'
rr/
>echo rr/| gawk '/^.*\/$/'
rr/
>echo rr/| sed -ne '/^.*\/$/p'
rr/

grep 3.0(incorrect)
>echo rr/| grep '^.*\/$'
>echo rr/| gawk '/^.*\/$/'
>echo rr/| sed -ne '/^.*\/$/p'

thanks.
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