Merge pull request #652 from jccazeaux/fix-for-#644

Fix callback calls. See #650. Regression since #546

spec/rivets/binders.js

@@ -217,6 +217,24 @@ describe("Rivets.binders", function() {
 
       Should(nestedEl.innerHTML).be.exactly("42");
     });
+
+    it("does not throw when root scope is reset", function () {
+      el.setAttribute('rv-if', 'scope.error.errors');
+      el.innerHTML = '<div>{scope.error.errors.email}</div>';
+      model = {
+        scope: {
+          error: {
+            errors: {
+              email: 'not a valid address'
+            }
+          }
+        }
+      };
+      var view = rivets.bind(el, model);
+      (function(){
+        model.scope.error = {};
+      }).should.not.throw();
+    })
   });
 
   describe("Custom binder with no attribute value", function() {

src/adapter.coffee

@@ -77,7 +77,7 @@ Rivets.public.adapters['.'] =
                 callbacks = map.callbacks
 
                 if callbacks[keypath]
-                  cb() for cb in callbacks[keypath]
+                  cb() for cb in callbacks[keypath].slice() when cb in callbacks[keypath]
                 @observeMutations newValue, obj[@id], keypath
 
     unless callback in callbacks[keypath]