From: noreply@...
Date: 2006-02-15T09:44:58+09:00
Subject: [ ruby-Bugs-3565 ] Method object used as Object#instance_eval block doesn't work (as expected)

Bugs item #3565, was opened at 2006-02-15 02:32
You can respond by visiting: 
http://rubyforge.org/tracker/?func=detail&atid=1698&aid=3565&group_id=426

Category: Core
Group: None
Status: Open
Resolution: None
Priority: 3
Submitted By: Ozgur Murat Homurlu (omh)
Assigned to: Nobody (None)
Summary: Method object used as Object#instance_eval block doesn't work (as expected)

Initial Comment:
I'm pasting an irb session which demonstrates the situation:

-------------
irb(main):001:0> class W
irb(main):002:1>     def foo
irb(main):003:2>         p self
irb(main):004:2>       end
irb(main):005:1>   end
=> nil
irb(main):006:0> class A
irb(main):007:1>     def bar
irb(main):008:2>         w = W.new
irb(main):009:2>         m  = w.method(:foo)
irb(main):010:2>         instance_eval &m
irb(main):011:2>       end
irb(main):012:1>   end
=> nil
irb(main):013:0> a = A.new
=> #<A:0xb7eea270>
irb(main):014:0> a.bar
ArgumentError: wrong number of arguments (1 for 0)
        from (irb):5:in `foo'
        from (irb):5:in `to_proc'
        from (irb):10:in `bar'
        from (irb):14
        from :0
irb(main):015:0> # Hmm, there's an extra argument is passed to W#foo,
irb(main):016:0*   # Let's see what it is:
irb(main):017:0*   class W
irb(main):018:1>     def foo(x)
irb(main):019:2>         p x
irb(main):020:2>         p self
irb(main):021:2>       end
irb(main):022:1>   end
=> nil
irb(main):023:0> a.bar
#<A:0xb7eea270>
#<W:0xb7f43b84>
=> nil
---------------

It seems like, unexpectedly introduced argument is the object "a".
Also, "a.instance_eval" doesn't work, self is still instance of "W".

The ruby version used is:
$ ruby --version
ruby 1.8.4 (2005-12-24) [i386-linux]


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You can respond by visiting: 
http://rubyforge.org/tracker/?func=detail&atid=1698&aid=3565&group_id=426