Built app with Xcode 15.2 crashes after AppSyncClient subscribe on iOS 16.3.1 version or lower

[CJblaze2022]

Describe the bug

We were working with Xcode 14.3.1 and made all the configurations to integrate appSync in our project, everything works as expected.

Recently we updated Xcode to 15.2 and the app crashes and stop working after AppSyncClient subscribe and shows EXC_BAD_ACCESS, we don't have crashes with iOS 16.6 devices or higher, crash occurs with lower iOS versions like 16.3.1, 16.1.1, 15.5, etc.

We used 3.1.2 Appsync version for our setting up, we tried with 3.6.4 and issue continues.

Currently we went back to Xcode 14.3.1 to deliver builds into TestFlight, now we are facing this apple warning (this is the reason why we switch from Xcode 14.3.1 to 15.2).

To Reproduce

call subscribe method for AppSyncClient.

Expected behavior

Call subscribe method for AppSyncClient without crash for devices with iOS 16.3.1 version or lower.

Screenshots

Environment(please complete the following information):

• AppSync SDK Version: [3.6.4]
• Dependency Manager: [Cocoapods]
• Swift Version : [5.9.2]

Device Information (please complete the following information):

• Device: [iPad 10 generation]
• iOS Version: [16.1.1]

Additional context

There is a related issue for amplify-flutter and it wasn't solved yet aws-amplify/amplify-flutter#4195

[sebaland]

Hi @CJblaze2022, thanks for opening this issue.

From what I found online, this crash happens when attempting to use NWPathMonitor on builds created using Xcode 15 and targeting iOS versions lower than 12, and it only seems to affect CocoaPods.

As a quick fix, you can update both AppSyncRealTimeClient and AWSAppSync targets in your Pods project to use iOS 12.0 as the Minimum Deployment version:

Note that this will be overwritten every time you do a pod install or pod update, so if you wish to avoid that you can instead add a post-install script to your Podfile:

  post_install do |installer|   
    installer.pods_project.targets.each do |target|
      if target.name  == "AWSAppSync" || target.name  == "AppSyncRealTimeClient"
        target.build_configurations.each do |config|
          config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '12.0'
        end
      end
    end
  end

---

We're already working on bumping the minimum deployments for these pods to iOS 12:

• feat: upgrade to min deployment version to iOS 12 #586
• feat: bump min deployment target to 12, include starscream 4.0.6 aws-amplify/aws-appsync-realtime-client-ios#156

Once these are merged and released, you won't need to manually update anything.
We'll post an update here once that's done.

[CJblaze2022]

hi @ruisebas so sorry for the late response, we were testing you solution (it is not easy to find iOS 15 and 16 devices 😅), we changed our minimum deployment from 11.4 to 12.0 and it solved the issue. Many thanks for your support! 🙌🏼

[sebaland]

AppSync SDK 3.7.0 and AppSyncRealTimeClient 3.2.0 have been released bumping the minimum deployment target to iOS 12. Please upgrade your dependencies to the latest versions.
Thanks!

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