# File lib/rake.rb, line 738
738:     def invoke_prerequisites(args, invocation_chain)
739:       threads = @prerequisites.collect { |p|
740:         Thread.new(p) { |r| application[r].invoke_with_call_chain(args, invocation_chain) }
741:       }
742:       threads.each { |t| t.join }
743:     end