lib/librarian/manifest_set.rb in librarian-0.0.5 vs lib/librarian/manifest_set.rb in librarian-0.0.6

@@ -76,11 +76,13 @@
     def deep_strip!(names)
       names = Array === names ? names.dup : names.to_a
       until names.empty?
         name = names.shift
         manifest = index.delete(name)
-        manifest.dependencies.each do |dependency|
-          names << dependency.name
+        if manifest
+          manifest.dependencies.each do |dependency|
+            names << dependency.name
+          end
         end
       end
       self
     end