1# $FreeBSD: head/tools/regression/bin/sh/expansion/set-u3.0 221463 2011-05-04 22:12:22Z jilles $
2
3set -u
4unset x
5v=$( (eval ': $((x))') 2>&1 >/dev/null)
6[ $? -ne 0 ] && [ -n "$v" ]
7