[#28015] RCR: RUBY_VERSION_INT — Roger Pack <rogerdpack2@...>

Situation:

14 messages 2010/02/02

[#28113] [Bug #2723] $: length affects re-require time of already loaded files — Greg Hazel <redmine@...>

Bug #2723: $: length affects re-require time of already loaded files

16 messages 2010/02/08

[#28151] [Bug #2739] ruby 1.8.7 built with pthreads hangs under some circumstances — Joel Ebel <redmine@...>

Bug #2739: ruby 1.8.7 built with pthreads hangs under some circumstances

31 messages 2010/02/11

[#28188] [Bug #2750] build fails on win32/MinGW: "executable host ruby is required." even when --with-baseruby is used — Christian Bodt <redmine@...>

Bug #2750: build fails on win32/MinGW: "executable host ruby is required." even when --with-baseruby is used

9 messages 2010/02/16

[#28206] Is Math module a wrapper of libm? — Yusuke ENDOH <mame@...>

Hi matz --

23 messages 2010/02/18
[#28212] Re: Is Math module a wrapper of libm? — Yukihiro Matsumoto <matz@...> 2010/02/18

Hi,

[#28219] Re: Is Math module a wrapper of libm? — Yusuke ENDOH <mame@...> 2010/02/18

Hi,

[#28225] Re: Is Math module a wrapper of libm? — Marc-Andre Lafortune <ruby-core-mailing-list@...> 2010/02/18

Hi,

[#28233] Re: Is Math module a wrapper of libm? — Kenta Murata <muraken@...> 2010/02/18

Hi,

[#28265] Re: Is Math module a wrapper of libm? — Marc-Andre Lafortune <ruby-core-mailing-list@...> 2010/02/20

Hi,

[#28286] Re: Is Math module a wrapper of libm? — Kenta Murata <muraken@...> 2010/02/21

Hi

[#28291] Re: Is Math module a wrapper of libm? — Marc-Andre Lafortune <ruby-core-mailing-list@...> 2010/02/22

Hi!

[#28235] [Feature #2759] Regexp /g and /G options — Michael Fellinger <redmine@...>

Feature #2759: Regexp /g and /G options

35 messages 2010/02/18

[#28329] [ANN] Ruby 1.9.2dev has passed RubySpec! — Yusuke ENDOH <mame@...>

Hi,

12 messages 2010/02/24

[#28355] [ANN] Toward rich diversity of Ruby development. — Urabe Shyouhei <shyouhei@...>

A short announcement: thanks to some helps of GitHub people, I now have

12 messages 2010/02/27

[#28365] Indentifying key MRI-on-Windows issues — Jon <jon.forums@...>

In an effort to begin summarizing key MRI-on-Windows open issues I'm starting this thread in hopes that those interested will respond with details on the key MRI issues they feel need resolution for Windows users.

11 messages 2010/02/27
[#28690] Re: Indentifying key MRI-on-Windows issues — Roger Pack <rogerdpack2@...> 2010/03/16

> My key concern is http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-=

[ruby-core:28201] [Bug #2754] Inconsistent behavior of Math methods on 1.8 when requiring Complex library

From: Brian Ford <redmine@...>
Date: 2010-02-17 18:33:38 UTC
List: ruby-core #28201
Bug #2754: Inconsistent behavior of Math methods on 1.8 when requiring Complex library
http://redmine.ruby-lang.org/issues/show/2754

Author: Brian Ford
Status: Open, Priority: Normal
ruby -v: ruby 1.8.7 (2009-12-24 patchlevel 248) [i686-darwin9.8.0]

On 1.8, requiring lib/complex.rb changes the behavior of Math methods to be Complex-aware. However, the new methods do not behave consistently with the methods they are replacing on various aspects not involving Complex numbers.

Here is an example with Math.atanh:

# The original method coerces an argument
$ ruby1.8.7 -v -e 'o = Object.new; def o.to_f; 0.5; end; p Math.atanh(o)'
ruby 1.8.7 (2009-12-24 patchlevel 248) [i686-darwin9.8.0]
0.549306144334055

# The new method does not
$ ruby1.8.7 -v -rcomplex -e 'o = Object.new; def o.to_f; 0.5; end; p Math.atanh(o)'
ruby 1.8.7 (2009-12-24 patchlevel 248) [i686-darwin9.8.0]
/Users/brian/devel/ruby187/install/lib/ruby/1.8/complex.rb:614:in `+': Object can't be coerced into Float (TypeError)
        from /Users/brian/devel/ruby187/install/lib/ruby/1.8/complex.rb:614:in `atanh'
        from -e:1

# The original method raises an ArgumentError
$ ruby1.8.7 -v -e 'p Math.atanh("str")'ruby 1.8.7 (2009-12-24 patchlevel 248) [i686-darwin9.8.0]
-e:1:in `atanh': invalid value for Float(): "str" (ArgumentError)
        from -e:1

# The new method raises a TypeError
$ ruby1.8.7 -v -rcomplex -e 'p Math.atanh("str")'
ruby 1.8.7 (2009-12-24 patchlevel 248) [i686-darwin9.8.0]
/Users/brian/devel/ruby187/install/lib/ruby/1.8/complex.rb:614:in `+': String can't be coerced into Float (TypeError)
        from /Users/brian/devel/ruby187/install/lib/ruby/1.8/complex.rb:614:in `atanh'
        from -e:1

These methods should behave consistently on all inputs that are not Complex.

There are numerous tickets related to Complex and Math interaction. I was unable to find one that states a satisfactory explanation to this issue. If there is one, please direct me to it and I apologize for the noise.

Thanks,
Brian


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