gistfile1.diff

diff --git a/actionview/lib/action_view/digestor.rb b/actionview/lib/action_view/digestor.rb
index 1f10378..c864571 100644
--- a/actionview/lib/action_view/digestor.rb
+++ b/actionview/lib/action_view/digestor.rb
@@ -73,11 +73,15 @@ module ActionView
       [] # File doesn't exist, so no dependencies
     end
 
-    def nested_dependencies
-      dependencies.collect do |dependency|
-        dependencies = PartialDigestor.new(name: dependency, finder: finder).nested_dependencies
-        dependencies.any? ? { dependency => dependencies } : dependency
-      end
+    def nested_dependencies(processed = Set.new)
+      dependencies.collect { |dependency|
+        unless processed.include?(dependency)
+          digestor = PartialDigestor.new(name: dependency, finder: finder)
+          nested   = digestor.nested_dependencies(processed + [dependency])
+
+          nested.any? ? { dependency => nested } : dependency
+        end
+      }.compact
     end
 
     private