[racket] create executable on linux

From: Jon Stenerson (jonstenerson at comcast.net)
Date: Sat Mar 8 12:28:31 EST 2014

If anyone has linux available can you try this out and see if it is an 
actual bug, and not just my installation? I did reinstall Racket 6 to no 
avail. I also checked that this does not happen on Windows. Thanks.

If I enter any program in DrRacket 6.0 on Ubuntu

#lang racket

then do "Create Executable" (standalone) and then, still in the gui, I 
run the above with ctrl+R, I get the error

define-values: assignment disallowed;
  cannot re-define a constant
   constant: lang:read.1
   Module Language: invalid language specification in: racket

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