> In Racket 8.9 you get: > abc: undefined; cannot reference an identifier before its definition > (no 'error' of any kind!) But that is an error. If y

> In Racket 8.9 you get: > abc: undefined; cannot reference an identifier before its definition > (no 'error' of any kind!) But that is an error. If you try this in the terminal, you will see that the message is colored red to show it is an error. If you try it in DrRacket, you will see the message written in red text with icons leading to the stack trace. If you try it in Emacs, you will see the message in red indicating it is an error.