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File: //usr/local/rvm/rubies/default/lib/ruby/gems/3.0.0/gems/typeprof-0.12.0/smoke/struct.rb
# tentative: Currently, the hidden instance variable belongs to Foo, not Anonymous Struct.
# Thus, it outputs "untyped"
class Foo < Struct.new(:a)
end
Foo.new.a = 1
__END__
# Classes
class AnonymousStruct_generated_1 < Struct[untyped]
  attr_accessor a(): untyped
end

class Foo < AnonymousStruct_generated_1
end