From: Brian Candler <b.candler@...>
Date: 2008-12-18T02:08:38+09:00
Subject: Re: Ruby 1.9.0 crash on Kubuntu Hardy Heron

Bug Free wrote:
> Hi,
> 
> Ruby 1.9.0 crashes on the following code:
> ======================
> class Foo
>   def Foo.get
>     return true if defined? @@x && @@x <= 0
>   end
> end
> Foo.get
> ======================
> 
> This is the version:
> clay:~/tests/ruby/bugs$ ruby1.9 -v
> ruby 1.9.0 (2007-12-25 revision 14709) [i486-linux]

Your program works fine for me on 1.9.1-preview2, under Ubuntu Hardy.

$ ruby19 crash.rb
$ ruby19 -v
ruby 1.9.1 (2008-12-01 revision 20438) [i686-linux]
$

So maybe you just need to upgrade.
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