lib/pallets/graph.rb in pallets-0.3.0 vs lib/pallets/graph.rb in pallets-0.4.0

@@ -41,8 +41,10 @@
       @nodes.each_key(&block)
     end
 
     def tsort_each_child(node, &block)
       @nodes.fetch(node).each(&block)
+    rescue KeyError
+      raise WorkflowError, "Task #{node} is marked as a dependency but not defined"
     end
   end
 end