Maintenance of Ruby 2.0.0 ended on February 24, 2016. Read more
InvocationChain tracks the chain of task invocations to detect circular dependencies.
# File rake/invocation_chain.rb, line 16 def append(value) if member?(value) fail RuntimeError, "Circular dependency detected: #{to_s} => #{value}" end self.class.new(value, self) end