memo_wise raises error when memoizing a method in a module that's included in a class that overrides `initialize`

[joevandyk]

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I might be using memo_wise incorrectly here.. but seeing some odd behavior when I memoize a method in a module that's included in a class that has an initialize method.

require 'memo_wise'

module ModuleMethods
  prepend MemoWise

  def a_module_method
    self.class.name
  end
  memo_wise :a_module_method
end

# Works to call ClassWithoutInitializer.new.a_module_method
class ClassWithoutInitializer
  include ModuleMethods
end

# Does not work to call ClassWithInitializer.new("thing").a_module_method
class ClassWithInitializer
  include ModuleMethods

  def initialize(name)
    @name = name
  end
end

# Works
puts ClassWithoutInitializer.new.a_module_method

# Does not Work
# memo_wise-1.7.0/lib/memo_wise.rb:183:in `a_module_method': undefined method `fetch' for nil:NilClass (NoMethodError)
puts ClassWithInitializer.new("name").a_module_method

[joevandyk]

https://github.com/panorama-ed/memo_wise/pull/321 seems to fix the issue for us.