# File lib/rake.rb, line 270
270:     def clone
271:       sibling = self.class.new
272:       instance_variables.each do |ivar|
273:         value = self.instance_variable_get(ivar)
274:         sibling.instance_variable_set(ivar, value.rake_dup)
275:       end
276:       sibling
277:     end