[racket] REPL @ Runtime Contract Modification?

From: Sean Kanaley (skanaley at gmail.com)
Date: Thu Jun 27 00:35:41 EDT 2013

Hello,

I'm debugging a heavily stateful GUI app that has reached a very 
specific state but has come across a contract error.  Is there some way 
to modify the contract and proceed or I must I reevaluate and run the 
gui and attempt to duplicate the state?

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