0. $ racket -i top.scm
1. Welcome to Racket v6.1.1.
2. > (value-of-program '(+ 2 2))
3. value-of-program: undefined;
4.  cannot reference undefined identifier
5.   context...:
6.    /usr/local/Cellar/plt-racket/6.1.1/share/racket/collects/racket/private/misc.rkt:87:7
7. > ^D

=>

$: undefined;

cannot reference an identifier before its definition

in module: 'm

racket: undefined;

cannot reference an identifier before its definition

in module: 'm

0-1i

top.scm: undefined;

cannot reference an identifier before its definition

in module: 'm

Welcome: undefined;

cannot reference an identifier before its definition

in module: 'm

to: undefined;

cannot reference an identifier before its definition

in module: 'm

Racket: undefined;

cannot reference an identifier before its definition

in module: 'm

v6.1.1.: undefined;

cannot reference an identifier before its definition

in module: 'm

#<procedure:>>

value-of-program: undefined;

cannot reference an identifier before its definition

in module: 'm

value-of-program:: undefined;

cannot reference an identifier before its definition

in module: 'm

undefined: undefined;

cannot reference an identifier before its definition

in module: 'm

cannot: undefined;

cannot reference an identifier before its definition

in module: 'm

reference: undefined;

cannot reference an identifier before its definition

in module: 'm

undefined: undefined;

cannot reference an identifier before its definition

in module: 'm

identifier: undefined;

cannot reference an identifier before its definition

in module: 'm

context...:: undefined;

cannot reference an identifier before its definition

in module: 'm

/usr/local/Cellar/plt-racket/6.1.1/share/racket/collects/rac

ket/private/misc.rkt:87:7: undefined;

cannot reference an identifier before its definition

in module: 'm

#<procedure:>>

^D: undefined;

cannot reference an identifier before its definition

in module: 'm