hush_test/hush-vars/var_preserved.tests

export a=b

# external program
a=c /bin/true
env | grep ^a=

# builtin
a=d true
env | grep ^a=

# exec with redirection only
# in bash, this leaks!
a=e exec 1>&1
env | grep ^a=

echo OK
1	export a=b
2
3	# external program
4	a=c /bin/true
5	env \| grep ^a=
6
7	# builtin
8	a=d true
9	env \| grep ^a=
10
11	# exec with redirection only
12	# in bash, this leaks!
13	a=e exec 1>&1
14	env \| grep ^a=
15
16	echo OK