From owner-freebsd-fs@FreeBSD.ORG  Mon Dec 15 20:48:47 2014
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Date: Mon, 15 Dec 2014 14:48:34 -0600
From: Larry Rosenman <ler@lerctr.org>
To: freebsd-fs@freebsd.org
Subject: zfs diff without allow as user gets coredump?
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Should we get a better message if you try to do a zfs diff as a normal
user, and diff hasn't been allowed?

You currently get:
borg.lerctr.org /home/ler $ zfs diff zroot/home/ler@zfs-auto-snap_hourly-2014-12-15-12h00
internal error: Invalid argument
Abort trap (core dumped)
borg.lerctr.org /home/ler $

Just curious.
-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 214-642-9640                 E-Mail: ler@lerctr.org
US Mail: 108 Turvey Cove, Hutto, TX 78634-5688