SyncError on macOS

[teawithfruit]

I'm trying to implement an app with sync between iOS and macOS.
Now I'm at the pint where a notofication from CloudKit should trigger the sync. On iOS everything works fine, but not on macOS. If I start the sync process with synchronizer?.synchronize(completion: ((Error?) -> ()) I got a "CloudKitSynchronizer >> Initiating synchronization" print on the console and a following SyncError without any further information.

I think this error raises because of an empty zoneID in line 35 of the following code.

SyncKit/SyncKit/Classes/QSSynchronizer/Operations/FetchDatabaseChangesOperation.swift

Lines 28 to 55 in 1a1c040

	override func start() {
	super.start()
	let databaseChangesOperation = CKFetchDatabaseChangesOperation(previousServerChangeToken: databaseToken)
	databaseChangesOperation.fetchAllChanges = true
	databaseChangesOperation.recordZoneWithIDChangedBlock = { zoneID in
	self.changedZoneIDs.append(zoneID)
	}
	databaseChangesOperation.recordZoneWithIDWasDeletedBlock = { zoneID in
	self.deletedZoneIDs.append(zoneID)
	}
	databaseChangesOperation.fetchDatabaseChangesCompletionBlock = { serverChangeToken, moreComing, operationError in
	if !moreComing {
	if operationError == nil {
	self.completion(serverChangeToken, self.changedZoneIDs, self.deletedZoneIDs)
	}
	self.finish(error: operationError)
	}
	}
	internalOperation = databaseChangesOperation
	database.add(databaseChangesOperation)
	}

@mentrena it would be really cool if you could have a look at this.

[mentrena]

SyncError is an Int enum, do you know which case you're getting?

For reference:

@objc public enum SyncError: Int, Error {
        /**
         *  Received when synchronize is called while there was an ongoing synchronization.
         */
        case alreadySyncing = 0
        /**
         *  A synchronizer with a higer `compatibilityVersion` value uploaded changes to CloudKit, so those changes won't be imported here.
         *  This error can be detected to prompt the user to update the app to a newer version.
         */
        case higherModelVersionFound = 1
        /**
         *  A record fot the provided object was not found, so the object cannot be shared on CloudKit.
         */
        case recordNotFound = 2
        /**
         *  Synchronization was manually cancelled.
         */
        case cancelled = 3
    }