[racket] R5.3 and #lang web-server compilation

On Aug 20, 2012, at 12:52 PM, Matthias Felleisen wrote:

> A compiler must know the free variables of an expression because 
> without the value of a free variable it cannot create code that 
> determines the value of an expression. 

That should have been 'without the means to retrieve the value of a free variable ...'

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