From: brian ford <brixen@...>
Date: 2011-09-14T08:51:58+09:00
Subject: [ruby-core:39532] Re: [Ruby 1.8 - Backport #5319][Open] Problem backporting [ruby-dev:38672] to 1.8.7p334

On Tue, Sep 13, 2011 at 2:02 PM, Brian Ford <brixen@gmail.com> wrote:
>
> Issue #5319 has been reported by Brian Ford.
>
> ----------------------------------------
> Backport #5319: Problem backporting [ruby-dev:38672] to 1.8.7p334
> http://redmine.ruby-lang.org/issues/5319
>
> Author: Brian Ford
> Status: Open
> Priority: Normal
> Assignee:
> Category:
> Target version: Ruby 1.8.7
>
>
> It appears that the change in [ruby-dev:38672] was not backported correctly to 1.8.7p334

This is also not corrected in p352.

Brian

>
> # comparison.rb
> inf = 1.0/0.0
> b = Float::MAX.to_i * 2
>
> p(inf <=> b) # => should be 1
> p(b <=> inf) # => should be -1
>
> p(inf <=> (-b)) # => should be 1
> p((-b) <=> inf) # => should be -1
>
> p((-inf) <=> b) # should be -1
> p(b <=> (-inf)) # should be 1
>
> p((-inf) <=> (-b)) # should be -1
> p((-b) <=> (-inf)) # should be 1
>
> $ ruby1.9.2 -v comparison.rb
> ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin10.8.0]
> 1
> -1
> 1
> -1
> -1
> 1
> -1
> 1
>
> $ ruby1.8.7 -v comparison.rb
> ruby 1.8.7 (2011-02-18 patchlevel 334) [i686-darwin10.8.0]
> comparison.rb:4: warning: Bignum out of Float range
> 0
> comparison.rb:5: warning: Bignum out of Float range
> 0
> comparison.rb:7: warning: Bignum out of Float range
> 0
> comparison.rb:8: warning: Bignum out of Float range
> 0
> comparison.rb:10: warning: Bignum out of Float range
> -1
> comparison.rb:11: warning: Bignum out of Float range
> 1
> comparison.rb:13: warning: Bignum out of Float range
> -1
> comparison.rb:14: warning: Bignum out of Float range
> 1
>
> Thanks,
> Brian
>
>
> --
> http://redmine.ruby-lang.org
>
>