lineno2.0 revision 262951 
1# $FreeBSD: stable/10/bin/sh/tests/builtins/lineno2.0 262951 2014-03-09 17:04:31Z jmmv $
2
3f() {
4	: ${LINENO+${x?}}
5}
6
7unset -v x
8command eval f 2>/dev/null && exit 3
9x=1
10f
11