String inspect warnings for bare Celluloid objects

lib/celluloid.rb

@@ -6,7 +6,11 @@
 module Celluloid
   extend self # expose all instance methods as singleton methods
 
-  SHUTDOWN_TIMEOUT = 120 # How long actors have to terminate
+  # How long actors have to terminate
+  SHUTDOWN_TIMEOUT = 120
+
+  # Warning message added to Celluloid objects accessed outside their actors
+  BARE_OBJECT_WARNING_MESSAGE = "WARNING: BARE CELLULOID OBJECT "
 
   class << self
     attr_accessor :logger     # Thread-safe logger class
@@ -202,7 +206,7 @@ module InstanceMethods
     def wrapped_object; self; end
 
     def inspect
-      str = "#<Celluloid::Actor(#{self.class}:0x#{object_id.to_s(16)})"
+      str = "#<#{Celluloid::BARE_OBJECT_WARNING_MESSAGE}(#{self.class}:0x#{object_id.to_s(16)})"
       ivars = instance_variables.map do |ivar|
         "#{ivar}=#{instance_variable_get(ivar).inspect}"
       end

lib/celluloid/proxies/actor_proxy.rb

@@ -20,7 +20,7 @@ def _send_(meth, *args, &block)
     end
 
     def inspect
-      Actor.call @mailbox, :inspect
+      Actor.call(@mailbox, :inspect).sub(::Celluloid::BARE_OBJECT_WARNING_MESSAGE, "Celluloid::Actor")
     rescue DeadActorError
       "#<Celluloid::Actor(#{@klass}) dead>"
     end

spec/support/actor_examples.rb

@@ -207,6 +207,13 @@ def to_s
     actor.wrapped_object.should be_a actor_class
   end
 
+  it "warns about leaked wrapped objects via #inspect" do
+    actor = actor_class.new "Troy McClure"
+
+    actor.inspect.should_not include Celluloid::BARE_OBJECT_WARNING_MESSAGE
+    actor.wrapped_object.inspect.should include Celluloid::BARE_OBJECT_WARNING_MESSAGE
+  end
+
   describe 'mocking methods' do
     let(:actor) { actor_class.new "Troy McClure" }