shopt -s lastpipe

unset foo bar
echo a b c | read foo
echo after 1: foo = $foo

unset tot
declare -i tot
printf "%d\n" 1 2 3 | while read foo; do tot+=$foo; done
echo after 2: tot = $tot

unset bar
echo g h i | bar=7
echo after: $bar

unset foo last
printf "%s\n" a b c | while read foo; do last=$foo; done
echo last = $last

exit 142 | false
echo $? -- ${PIPESTATUS[@]}

true | false | /usr/bin/true
echo $? -- ${PIPESTATUS[@]}

true | /usr/bin/true | false
echo $? -- ${PIPESTATUS[@]}

set -o pipefail
true | /usr/bin/true | false
echo $? -- ${PIPESTATUS[@]}

true | /usr/bin/false | true
echo $? -- ${PIPESTATUS[@]}
set +o pipefail

${THIS_SH} ./lastpipe1.sub
echo lastpipe1.sub returns $?