False Positive: ivar in dynamic method definition of Class.new

[SampsonCrowley]

Code:

module QueryExtensions
  def self.ensure_where_not_chain(base)
    base.class_eval do
      const_get(:WhereNotChain)
    rescue NameError
      klass = Class.new {
        def initialize(scope)
          @scope = scope
        end
      }

      const_set(:WhereNotChain, klass)
    end
    base.const_get(:WhereNotChain)
  end
end

Results:

config/hooks/after_gems/03.query_extensions.rb:183:13: C: ThreadSafety/InstanceVariableInClassMethod: Avoid instance variables in class methods.
            @scope = scope
            ^^^^^^

The parser is detecting the method definition in the dynamically created class as having an instance variable in a class method. this is not the case. it is defining a method in the class and the instance variable is for an instance