xref: /freebsd/bin/sh/tests/expansion/set-u3.0 (revision 7c31cdfa408a4ebce7a3e10d29056a15c28bc092) 
1
2set -u
3unset x
4v=$( (eval ': $((x))') 2>&1 >/dev/null)
5[ $? -ne 0 ] && [ -n "$v" ]
6