From 8f783be105ed6b39e00ee67fdd23e2cf5671f885 Mon Sep 17 00:00:00 2001
From: Petr Chalupa <git@pitr.ch>
Date: Sun, 16 Oct 2016 12:43:56 +0200
Subject: [PATCH] Initialize instance variables to nil, fix #566

---
 lib/concurrent/concern/obligation.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/concurrent/concern/obligation.rb b/lib/concurrent/concern/obligation.rb
index 17c035dbc..2c9ac1200 100644
--- a/lib/concurrent/concern/obligation.rb
+++ b/lib/concurrent/concern/obligation.rb
@@ -138,6 +138,7 @@ def get_arguments_from(opts = {})
       # @!visibility private
       def init_obligation
         @event = Event.new
+        @value = @reason = nil
       end
 
       # @!visibility private