UTY-2647: bad sync point in ecs view manager (#1430)

* fix codege, lookup components from SpatialOSReceiveSystem

* use explicit system

* Update CHANGELOG.md

* Update CHANGELOG.md

* Update CHANGELOG.md

Author: BryanJY-Wong

CHANGELOG.md

@@ -11,6 +11,7 @@
 - Fixed an `IndexOutOfRangeException` that could be thrown when editing your 'Build Configuration' asset. [#1441](https://github.com/spatialos/gdk-for-unity/pull/1441)
 - The 'Build Configuration' Inspector window will no longer report your Android SDK installation as missing if you have a completely fresh Unity installation with the bundled Android SDK. [#1441](https://github.com/spatialos/gdk-for-unity/pull/1441)
 - Fixed a bug where having spaces in the path to your project would cause the 'Local launch' and 'Launch standalone client' menu options to fail on MacOS. [#1442](https://github.com/spatialos/gdk-for-unity/pull/1442)
+- Fixed a faulty sync point caused by using `ComponentDataFromEntity` of the `WorkerSystem`. [#1430](https://github.com/spatialos/gdk-for-unity/pull/1430)
 
 ### Internal
 

workers/unity/Packages/io.improbable.gdk.core/.codegen/Source/Generators/Core/UnityEcsViewManagerGenerator.cs

@@ -33,6 +33,7 @@ public static CodeWriter Generate(UnityComponentDetails componentDetails)
                         {
                             evm.Line($@"
 private WorkerSystem workerSystem;
+private SpatialOSReceiveSystem spatialOSReceiveSystem;
 private EntityManager entityManager;
 
 private readonly ComponentType[] initialComponents = new ComponentType[]
@@ -63,7 +64,7 @@ public void ApplyDiff(ViewDiff diff)
     }
 
     var updates = diffStorage.GetUpdates();
-    var dataFromEntity = workerSystem.GetComponentDataFromEntity<Component>();
+    var dataFromEntity = spatialOSReceiveSystem.GetComponentDataFromEntity<Component>();
     for (int i = 0; i < updates.Count; ++i)
     {
         ApplyUpdate(in updates[i], dataFromEntity);
@@ -92,6 +93,13 @@ public void Init(World world)
     {
         throw new ArgumentException(""World instance is not running a valid SpatialOS worker"");
     }
+
+    spatialOSReceiveSystem = world.GetExistingSystem<SpatialOSReceiveSystem>();
+
+    if (spatialOSReceiveSystem == null)
+    {
+        throw new ArgumentException(""Could not find SpatialOS Receive System in the current world instance"");
+    }
 }
 ");
                             evm.Method("public void Clean()", m =>