Perception warnings on iOS 17+

[ddanilyuk]

Description

After updating to TCA 1.21.0 (with Perception 2.0), our iOS 17+ project began producing runtime Perception warnings.

Checklist

• I have determined whether this bug is also reproducible in a vanilla SwiftUI project.
• If possible, I've reproduced the issue using the main branch of this package.
• This issue hasn't been addressed in an existing GitHub issue or discussion.

Expected behavior

No response

Actual behavior

No response

Reproducing project

No response

The Composable Architecture version information

1.21.0

Destination operating system

iOS 18.5

Xcode version information

16.4

Swift Compiler version information

[winston-riley-zocdoc]

fwiw, seeing the same thing on a macOS Project targeting macOS 15.

[0xcefaedfe]

I see it too, here's a code snippet that reproduces the issue:

import SwiftUI
import ComposableArchitecture

@Reducer
struct TestReducer {
  @ObservableState
  public struct State: Equatable {
    var value: String = "Some Value"
  }
}

struct TestView: View {
  let store: StoreOf<TestReducer>

  var body: some View {
    Text("\(store.value)")
  }
}

@main
struct TestApp: App {
  let store = Store(initialState: TestReducer.State(), reducer: TestReducer.init)
    
  var body: some Scene {
    WindowGroup {
      TestView(store: store)
    }
  }
}

There's also this logged in the console:
<decode: bad range for [%@] got [offs:426 len:808 within:0]>

[mbrandonw]

Thank you everyone for the reports! I think a few things slipped by in our perception 2.0 release. We've got a PR up here to address: pointfreeco/swift-perception#143

Could y'all pin to that branch and see if it fixes your problems?

[mbrandonw]

You will need to also pin to this branch of TCA: #3740

[0xcefaedfe]

I still see the issue with the above snippet, although only once, while before it was displayed twice.

[mbrandonw]

Hi @0xcefaedfe, can you give me more details about the snippet? Which Xcode, deployment target and test simulator are you using? That way I can try reproducing locally.

[0xcefaedfe]

Xcode 16.4, deployment target 18.5, iPhone 16 Pro simulator with 18.5.

[mbrandonw]

Thank you! Should have this fixed shortly.

[mbrandonw]

Ok, think we have the final fix ready for everyone to test. Please point TCA and Perception to perception-2-fixes and let us know if everything works. Thanks for helping us out!

[roanutil]

perception-2-fixes works fine for me. No more warnings.

[0xcefaedfe]

Can confirm too, it works as expected. Thank you!

[stephencelis]

This has been fixed in Perception 2.0.1! Thanks all for testing 😄