From 88cac73b2071e9ccd49f15d0fdf2f867f020b748 Mon Sep 17 00:00:00 2001
From: John Rommel Estropia <rommel.estropia@gmail.com>
Date: Fri, 1 Apr 2016 07:41:23 +0900
Subject: [PATCH] fix assertion error

---
 CoreStore/Internal/NotificationObserver.swift | 4 ++--
 CoreStore/Observing/ListMonitor.swift         | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/CoreStore/Internal/NotificationObserver.swift b/CoreStore/Internal/NotificationObserver.swift
index 33c414a..b1ca9c1 100644
--- a/CoreStore/Internal/NotificationObserver.swift
+++ b/CoreStore/Internal/NotificationObserver.swift
@@ -36,14 +36,14 @@ internal final class NotificationObserver {
     let object: AnyObject?
     let observer: NSObjectProtocol
     
-    init(notificationName: String, object: AnyObject?, closure: (note: NSNotification) -> Void) {
+    init(notificationName: String, object: AnyObject?, queue: NSOperationQueue? = nil, closure: (note: NSNotification) -> Void) {
         
         self.notificationName = notificationName
         self.object = object
         self.observer = NSNotificationCenter.defaultCenter().addObserverForName(
             notificationName,
             object: object,
-            queue: nil,
+            queue: queue,
             usingBlock: closure
         )
     }
diff --git a/CoreStore/Observing/ListMonitor.swift b/CoreStore/Observing/ListMonitor.swift
index 2c6b748..2c020fc 100644
--- a/CoreStore/Observing/ListMonitor.swift
+++ b/CoreStore/Observing/ListMonitor.swift
@@ -1033,6 +1033,7 @@ public final class ListMonitor<T: NSManagedObject> {
         self.observerForWillChangePersistentStore = NotificationObserver(
             notificationName: NSPersistentStoreCoordinatorStoresWillChangeNotification,
             object: coordinator,
+            queue: NSOperationQueue.mainQueue(),
             closure: { [weak self] (note) -> Void in
                 
                 guard let `self` = self else {
@@ -1054,6 +1055,7 @@ public final class ListMonitor<T: NSManagedObject> {
         self.observerForDidChangePersistentStore = NotificationObserver(
             notificationName: NSPersistentStoreCoordinatorStoresDidChangeNotification,
             object: coordinator,
+            queue: NSOperationQueue.mainQueue(),
             closure: { [weak self] (note) -> Void in
                 
                 guard let `self` = self else {