Subject: Re: bug#25180: grep: (standard input): Invalid argument
From: Paul Eggert <[email-masked]>
To: Andreas Schwab <[email-masked]>, [email-masked]
Date: Mon, 12 Dec 2016 08:40:09 -0800
List-Id: <debbugs-submit.debbugs.gnu.org>

Thanks, I didn't know about that lseek glitch with the proc file system. 
I installed the attached patch to the grep master.

The use case seems unusual. Did a user discover this in practice?