I have a bunch of students this quarter that are writing code like this:

(- (random 1 9) 1)

Why? because they tried writing

(random 0 8) 

and got a contract error, to wit:

random: contract violation
  expected: (integer-in 1 4294967087)
  given: 0

I’m assuming that this contract was written by someone who imagined that the 
recipient would realize that the first argument could be omitted entirely, but 
my sample suggests that’s not the case.

Would it be all right to just change the contract to allow zero as a first 
argument? I’d be happy to submit a pull request, if so.


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