From: Yukihiro Matsumoto <matz@...>
Date: 2009-10-30T08:09:02+09:00
Subject: [ruby-core:26420] Re: [Bug #1901] Segfault for Enumerable#count When Aliased to #size

Hi,

In message "Re: [ruby-core:24794] [Bug #1901] Segfault for Enumerable#count When Aliased to #size"
    on Thu, 6 Aug 2009 23:24:18 +0900, Run Paint Run Run <redmine@ruby-lang.org> writes:

|  class E
|    include Enumerable
|    alias :size :count
|    def each
|      yield 1
|    end
|  end
|  
|  p E.new.count
|
|  $ ruby -v /tmp/enum-size.rb 
|  ruby 1.9.2dev (2009-08-05 trunk 24397) [i686-linux]
|  Segmentation fault
|
|1.8.7 gives a SystemStackError. It would be nice if #count recognized #size was an alias and didn't try to invoke it.

I fixed this by r25560, but I still consider the fix is implementation
dependent, so that some implementation might (and can) cause infinite
recursion.

							matz.