set-u3.0 revision 221463
1203576Sjilles# $FreeBSD: head/tools/regression/bin/sh/expansion/set-u3.0 221463 2011-05-04 22:12:22Z jilles $ 2203576Sjilles 3203576Sjillesset -u 4203576Sjillesunset x 5203576Sjillesv=$( (eval ': $((x))') 2>&1 >/dev/null) 6203576Sjilles[ $? -ne 0 ] && [ -n "$v" ] 7203576Sjilles