[Init.TOKEN -> Command]
Starting new command: ls
[Command.TOKEN -> Arguments]
Appending -l to the argument list
[Arguments.PIPE -> Make_Pipe]
Set up pipe
Execute ls with arguments { ls, -l, (null) }
[Make_Pipe.TOKEN -> Command]
Starting new command: head
[Command.TOKEN -> Arguments]
Appending -n to the argument list
[Arguments.TOKEN -> Arguments]
Appending 1 to the argument list
[Arguments.NEWLINE -> Term]
Execute head with arguments { head, -n, 1, (null) }