Additional error handling/logging during contact sync (#1395)

FREEBIE

js/background.js

@@ -193,7 +193,8 @@
             return;
         }
 
-        return ConversationController.findOrCreateById(id, 'private').then(function(conversation) {
+        return ConversationController.findOrCreateById(id, 'private')
+            .then(function(conversation) {
                 return new Promise(function(resolve, reject) {
                     conversation.save({
                         name: details.name,
@@ -202,7 +203,14 @@
                         active_at: conversation.get('active_at') || Date.now(),
                     }).then(resolve, reject);
                 });
-        }).then(ev.confirm);
+            })
+            .then(ev.confirm)
+            .catch(function(error) {
+                console.log(
+                    'onContactReceived error:',
+                    error && error.stack ? error.stack : error
+                );
+            });
     }
 
     function onGroupReceived(ev) {

js/conversation_controller.js

@@ -104,7 +104,14 @@
                 conversation.fetch().then(function() {
                     resolve(conversation);
                 }, function() {
-                    conversation.save().then(function() {
+                    var deferred = conversation.save();
+
+                    if (!deferred) {
+                        console.log('Conversation save failed! ', id, type);
+                        return reject(new Error('findOrCreateById: Conversation save failed'));
+                    }
+
+                    deferred.then(function() {
                         resolve(conversation);
                     }, reject);
                 });