Crash: AWSAppSyncClient.sync about aws-mobile-appsync-sdk-ios

[GNiewoehner]

Some additional findings:

I went back up to version 3.2.0 (testing each version between 3.4.2 and 3.2.0) still getting the same crash no matter which sdk version is used. Looking at the network tab shows that no request is send prior the crash. Maybe a problem with the Swift version?

[GNiewoehner]

To reproduce the crash download the example app:

Appsync-Carthage-Subscriber-Test-App.zip

1. Run carthage update --use-xcframeworks and add the frameworks to the target EventsApp in the general tab.
2. Go to http://console.aws.amazon.com/appsync/home and create a new api "Start from a sample project" -> "Event App" -> Start. When created download the "awsconfiguration.json" for iOS and replace the file in the example app
3. Build and run the app
4. Press the add button

5. Fill out the text fields and press "Add Event"

6. Click on the event in the table view -> the app crashes when creating a subscription

If we remove the frameworks and add the AppSync SDK using Swift Package Manager the app no longer crashes when redoing the same steps.

[royjit]

Can you see if the crash occurs if you add AppSyncRealTimeClient framework as a dependency ?

[GNiewoehner]

Those are the frameworks that i tested with as we use them in our main app. They were all created using Carthage and are added as dependencies to the app => Crash occurs

[GNiewoehner]

Version 3.4.3 fixed the problem.