Yukihiro Matsumoto schrieb:
> In message "Re: [ruby-core:24116] [Bug #1715] Numeric#arg for NaN is Inconsistent Across Versions"
>     on Fri, 3 Jul 2009 00:26:44 +0900, Run Paint Run Run <redmine / ruby-lang.org> writes:
> 
> |Numeric#arg gives 0 for NaN on 1.9; Pi for NaN on 1.8:
> 
> Both versions should return NaN for NaN.

If we want to be precise in the Unknown, maybe both versions should give 
NaN for 0.arg and 0.0.arg (and Complex zero) as well?

 Matthias