FOO=bar cat  < <(echo $FOO:1; echo $FOO:2)
echo after: --${FOO}--

unset FOO
FOO=global

FOO=bar cat  < <(echo $FOO:1; echo $FOO:2)
echo after: --${FOO}--

unset FOO
FOO=bar read x  < <(echo -n $FOO:1; echo $FOO:2)
echo after: --${FOO}--
echo x = $x