lib/concurrent/contract.rb in concurrent-ruby-0.4.0 vs lib/concurrent/contract.rb in concurrent-ruby-0.4.1

@@ -5,9 +5,10 @@
   class Contract
     include Obligation
 
     def initialize(opts = {})
       @state = :pending
+      init_mutex
       set_deref_options(opts)
     end
 
     def complete(value, reason)
       @value = value