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failures=
failure() {
echo "Error at line $1" >&2
failures=x$failures
}
exit 4 & p4=$!
exit 8 & p8=$!
wait $p4
[ $? = 4 ] || failure $LINENO
wait $p8
[ $? = 8 ] || failure $LINENO
exit 3 & p3=$!
exit 7 & p7=$!
wait $p7
[ $? = 7 ] || failure $LINENO
wait $p3
[ $? = 3 ] || failure $LINENO
test -z "$failures"
|
