From: Caleb Clausen <vikkous@...>
Date: 2010-07-19T23:31:50+09:00
Subject: Re: Instance eval in 1.8 and 1.9

On 7/19/10, Brian Candler <b.candler@pobox.com> wrote:
> Caleb Clausen wrote:
>> On 7/17/10, Gavin Sinclair <gsinclair@gmail.com> wrote:
>>>>
>>>> Your code runs without errors for me with ruby 1.9.1-p376.
>>>>
>>>> Stefano
>>>
>>> Thanks for testing it.  I should have specified my version, of course:
>>>
>>>   ruby 1.9.2dev (2010-07-02 revision 28524) [i386-cygwin]
>>
>> It seems like this could be a regression.
>
> Seconded. The program works OK for me with ruby 1.9.2dev (2009-07-18
> trunk 24186) [i686-linux]

Nobu says this is not a bug, and his explanation makes perfect sense
to me, now that I understand it. instance_eval passes self as a
parameter to the block in 1.8 and 1.9.2 but didn't in 1.9.1. Also,
lambda panics if it doesn't receive the expected number of params,
whereas proc does not.

See ruby-core:31336