From: transfire@...
Date: 2006-05-21T04:10:59+09:00
Subject: I call Ducktype Violation on #to_proc! :)

Trying to be just ducky...

  class X
    def to_proc
      self
    end
    def call
      "x"
    end
  end

  x = X.new

  def y( &b )
    b.call
  end

  y(&x)

TypeError: X#to_proc should return Proc
        from (irb):14

Why isn't it enough that it x responds to #call? 

T.