xref: /freebsd/bin/sh/tests/expansion/set-u3.0 (revision f0865ec9906d5a18fa2a3b61381f22ce16e606ad) 
1
2set -u
3unset x
4v=$( (eval ': $((x))') 2>&1 >/dev/null)
5[ $? -ne 0 ] && [ -n "$v" ]
6