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Bug #11283

Updated by nepalez (Andrew Kozin) over 9 years ago

That is how it works: 

     module Test 
       def self.build(&block) 
         klass = Class.new(Object) 
         klass.__send__(:define_method, :foo) 
         klass.__send__(:define_method, :bar) 
         klass 
       end 
     end 

     Tested = Test.build { :foo } 
     # warning: tried to create Proc object without a block 
     # => Tested 
     Tested.new.foo 
     # => :foo 
     Tested.new.bar 
     # => :foo 

 The block is assigned to all on calls to `:define_method` via `Object#__send__` implicitly, while it wasn't asked to. 

 The behaviour is tested under MRI 1.9.3, 2.0, 2.1, 2.2, ruby-head. It doesn't occur under rbx-2 Exceptions are raised by Rbx and jruby (1.7, 9.0.0.0). Jruby interpreters. 

 For the context look at this thread https://github.com/mbj/mutant/issues/356

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