From: Nobuyoshi Nakada <nobu@...>
Date: 2009-03-20T09:56:22+09:00
Subject: [ruby-core:22962] Re: [Bug #1302] Strange behavior of callcc

Hi,

At Thu, 19 Mar 2009 04:33:40 +0900,
Christophe Calves wrote in [ruby-core:22933]:
> The code runs "[0].map" with a block which uses callcc to
> stop the execution of map and return the continuation. Later
> this continuation is called three times with three different
> values. The expected behavior is that these calls should
> result in three different computations. Each computation
> being the mapping with the corresponing value. Instead, the
> result is very strange.

I don't consider it a bug.

This is caused by the implementation of Enumerable#map, not
callcc.  And the difference between callcctest.rb and
testcallcc.scm would be resulted in because of the difference
between Ruby's Array and Scheme's list.

-- 
Nobu Nakada