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bug#14164: letrec: detect illegal accesses to vars before entering body
From: |
Nikita Karetnikov |
Subject: |
bug#14164: letrec: detect illegal accesses to vars before entering body |
Date: |
Tue, 09 Apr 2013 10:37:38 +0400 |
>> According to the manual [1], this snippet:
>>
>> (letrec ((a 42)
>> (b (+ a 10)))
>> (* a b))
>>
>> should return "Error: unbound variable: a."
> The manual doesn't say anything nearly that specific.
Either you missed it or I misunderstood this sentence. So if you missed
it, it can be found below 'syntax: letrec* bindings body'.
> In general, if the manual says you "may not" do something, or if the
> R5RS says "it is an error", that means that if you do, the results are
> unspecified.
Are you talking about the result of 'letrec' or 'b'? Anyway, why does
it return 2184 if the results are unspecified? Could you elaborate?
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