Guard the rails core extensions against null Redis registry (#357)

* Guard the rails core extensions against null Redis registry
DataDog · Feb 28, 2018 · d6c0375 · d6c0375
1 parent 98ab52f
commit d6c0375
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/ddtrace/contrib/rails/core_extensions.rb b/lib/ddtrace/contrib/rails/core_extensions.rb
@@ -336,7 +336,8 @@ def delete(*args, &block)
     end
 
     def self.reload_cache_store
-      return unless Datadog.registry[:redis].patched?
+      redis = Datadog.registry[:redis]
+      return unless redis && redis.patched?
 
       return unless defined?(::ActiveSupport::Cache::RedisStore) &&
                     defined?(::Rails.cache) &&