From: Ken Bloom <kbloom@...>
Date: 2006-12-05T23:40:09+09:00
Subject: Re: Integer#to_s(2) works on x86, fails on x86_64

On Tue, 05 Dec 2006 23:24:57 +0900, Mihai Vlad wrote:

> Kalman Noel wrote:
>> Suraj Kurapati:
>>   
>>> $ ruby -v
>>> ruby 1.8.4 (2005-12-24) [x86_64-linux]
>>>
>>> $ irb
>>>     
>>>>> 2956350890592680056.to_s(2)
>>>>>         
>>> RangeError: integer 2956350890592680056 too big to convert to `int'
>>>     
>>
>> irb> "#{RUBY_VERSION} #{RUBY_PLATFORM} #{RUBY_RELEASE_DATE}"
>>   => "1.9.0 x86_64-linux 2006-10-16"
>> irb> 2956350890592680056.to_s(2)
>>   => "10100100000111000100010111100010111001001011111011100001111000"
>>
>> irb> "#{RUBY_VERSION} #{RUBY_PLATFORM} #{RUBY_RELEASE_DATE}"
>>   => "1.8.4 x86_64-linux 2005-12-24"
>> irb> 2956350890592680056.to_s(2)
>> RangeError: integer 2956350890592680056 too big to convert to `int'
>>         from (irb):2:in `to_s'
>>         from (irb):2
>>
>> Kalman
>>
>>   
> 
> Seems on 1.8.5 is ok aswell, so the problem is < 1.8.4
> 
> irb(main):001:0> "#{RUBY_VERSION} #{RUBY_PLATFORM} #{RUBY_RELEASE_DATE}"
> => "1.8.5 x86_64-linux 2006-12-04"
> irb(main):002:0> 2956350890592680056.to_s(2)
> => "10100100000111000100010111100010111001001011111011100001111000"

Yep. Here are the relevant changelog entries.

Fri Aug 25 17:15:17 2006  Yukihiro Matsumoto  <matz@ruby-lang.org>

        * stable version 1.8.5 released.

Sun Feb  5 21:05:34 2006  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>

        * numeric.c (fix_to_s): removed workaround for radix 2. Historically,
          rb_fix2str could only handle radix 8, 10, 16. (Rev1.37) But for now,
          it can handle radix 2..36. [ruby-Bugs#3438] [ruby-core:7300]
Sat Feb  4 15:56:37 2006  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>

        * numeric.c (fix_to_s): (2**32).to_s(2) fails with exception where
          sizeof(int) == 4 < sizeof(long). [ruby-core:7300]

Sat Dec 24 18:58:14 2005  Yukihiro Matsumoto  <matz@ruby-lang.org>

        * stable version 1.8.4 released.


-- 
Ken Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/