1221463Sjilles# $FreeBSD: releng/11.0/bin/sh/tests/expansion/set-u3.0 221463 2011-05-04 22:12:22Z jilles $ 2221463Sjilles 3221463Sjillesset -u 4221463Sjillesunset x 5221463Sjillesv=$( (eval ': $((x))') 2>&1 >/dev/null) 6221463Sjilles[ $? -ne 0 ] && [ -n "$v" ] 7