[BUGFIX beta] rollbackAttributes() works after multiple failed saves

packages/ember-data/lib/system/model/states.js

@@ -1,7 +1,6 @@
 /**
   @module ember-data
 */
-import EmptyObject from "ember-data/system/empty-object";
 var get = Ember.get;
 /*
   This file encapsulates the various states that a record can transition
@@ -347,10 +346,6 @@ var DirtyState = {
 
     invokeLifecycleCallbacks: function(internalModel) {
       internalModel.triggerLater('becameInvalid', internalModel);
-    },
-
-    exit: function(internalModel) {
-      internalModel._inFlightAttributes = new EmptyObject();
     }
   }
 };

packages/ember-data/tests/unit/model/rollback-attributes-test.js

@@ -244,6 +244,49 @@ test("invalid new record's attributes can be rollbacked", function() {
   });
 });
 
+test("invalid record's attributes can be rollbacked after multiple failed calls - #3677", function() {
+  var person;
+
+  var adapter = DS.RESTAdapter.extend({
+    ajax: function(url, type, hash) {
+      var error = new DS.InvalidError();
+      return Ember.RSVP.reject(error);
+    }
+  });
+
+  env = setupStore({ person: Person, adapter: adapter });
+
+  run(function() {
+    person = env.store.push({
+      data: {
+        type: 'person',
+        id: 1,
+        attributes: {
+          firstName: 'original name'
+        }
+      }
+    });
+
+    person.set('firstName', 'updated name');
+  });
+
+  run(function() {
+    equal(person.get('firstName'), 'updated name', "precondition: firstName is changed");
+
+    person.save().then(null, async(function() {
+      equal(person.get('hasDirtyAttributes'), true, "has dirty attributes");
+      equal(person.get('firstName'), 'updated name', "firstName is still changed");
+
+      return person.save();
+    })).then(null, async(function() {
+      person.rollbackAttributes();
+
+      equal(person.get('hasDirtyAttributes'), false, "has no dirty attributes");
+      equal(person.get('firstName'), 'original name', "after rollbackAttributes() firstName has the original value");
+    }));
+  });
+});
+
 test("deleted record's attributes can be rollbacked", function() {
   var person, people;