Commits on Nov 18, 2015

1. Reset globally cached klass methods in Module#prepend_features …

   Consider this example:
   
       class Parent
         def bar
         end
       end
   
       class Child < Parent
         def bar
           super
         end
   
         def foo
         end
       end
   
       Child.new.foo
       Child.new.bar
       # foo and bar are cached in the global cache
   
       prepended_module = Module.new do
         def foo
         end
       end
       Child.prepend(prepended_module)
       # foo is cleared from the global cache, but bar is not
       # Child hierarchy is now Child < IncludedModule(prepended_module) < IncludedModule(Child) < Parent
   
       Child.new.bar
       # When bar is looked up here, being still cached globally, Child#bar is the
       # result of the lookup (normally, it should be IncludedModule(Child)#bar).
       # Now when Child#bar is looking for its super, it goes to the first included
       # module, then the second included module, which has the same method table
       # as Child, returning Child#bar, causing non-ending recursive calls.

   

   ahmadsherif committed Nov 18, 2015
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2. Add a spec for the latest change in Module#prepend_features

   

   ahmadsherif committed Nov 18, 2015
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