False positive: ThreadSafety/InstanceVariableInClassMethod in anonymous classes

[jas14]

Summary

ThreadSafety/InstanceVariableInClassMethod rule fires when assigning an anonymous class's instance variable.

Example file

class Outer
  def self.create_anonymous_class
    Class.new do
      def initialize
        @anonymous_variable = 'hi'
      end
    end
  end
end

Expected

No errors.

Actual

Inspecting 1 file
C

Offenses:

test.rb:7:9: C: ThreadSafety/InstanceVariableInClassMethod: Avoid instance variables in class methods.
        @anonymous_variable = 'hi'
        ^^^^^^^^^^^^^^^^^^^