Support for the Ruby 2.1 series ended on March 31 2017. See here for details.
LinkedList
InvocationChain tracks the chain of task invocations to detect circular dependencies.
Append an invocation to the chain of invocations. It is an error if the invocation already listed.
# File rake/invocation_chain.rb, line 15 def append(invocation) if member?(invocation) fail RuntimeError, "Circular dependency detected: #{to_s} => #{invocation}" end conj(invocation) end