# $FreeBSD: src/tools/regression/bin/sh/expansion/set-u3.0,v 1.1 2011/05/04 22:12:22 jilles Exp $

set -u
unset x
v=$( (eval ': $((x))') 2>&1 >/dev/null)
[ $? -ne 0 ] && [ -n "$v" ]