OpenStruct#respond_to? when true fails with NameError

[msxavi]

Hello,

I have a case where I overrode respond_to? on a subclass of OpenStruct because I this class to work as fake object.

class Dep
  def a
    "Hello from Dep"
  end
end
class FakeDep < OpenStruct
  def respond_to?(*args)
    super || Dep.new.respond_to?(*args)
  end  
end

FakeDep.new(a: [])  #=> NameError: undefined method `a' for class `FakeDep'

      owner = method!(name).owner
              ^^^^^^^
from /usr/local/lib/ruby/3.1.0/ostruct.rb:245:in `method'

I didn't fully understand https://github.com/ruby/ruby/commit/f48edc28dda3df962f289fd373c06a8dfeda3dc0 and what happens with owner = method!(name).owner. Is the error above a valid case?

TIA