PARENT: Going to transfer line -- 1 --
CHILD: Received line -- 1 --
PARENT: Going to transfer line -- 2 --
CHILD: Received line -- 2 --
PARENT: Going to transfer line -- 3 --
CHILD: Received line -- 3 --
PARENT: Going to transfer line -- 4 --
CHILD: Received line -- 4 --
PARENT: Going to transfer line -- 5 --
CHILD: Received line -- 5 --
PARENT: closed writer, waiting for child to exit
CHILD: exiting
PARENT: exiting