Runtime warnings

[arnauddorgans]

Description

This code snippet produces 3 runtime warnings on appear about Perceptible state was accessed but is not being tracked. Track changes to state by wrapping your view in a 'WithPerceptionTracking' view.

@Perceptible
class FeatureModel {
    var text = ""
}

struct ContentView: View {
    @Perception.Bindable var model: FeatureModel

    var body: some View {
        WithPerceptionTracking {
            TextField("", text: $model.text)
                .background(GeometryReader { proxy in
                    Color.clear
                        .randomModifier(of: proxy.safeAreaInsets)
                })
        }
    }
}

Checklist

• I have determined that this bug is not reproducible using Swift's observation tools. If the bug is reproducible using the @Observable macro or another tool from the Observation framework, please file it directly with Apple.
• 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 runtime warning

Actual behavior

Runtime warning

Steps to reproduce

Full app code

@Perceptible
class FeatureModel {
    var text = ""
}

struct ContentView: View {
    @Perception.Bindable var model: FeatureModel

    var body: some View {
        WithPerceptionTracking {
            TextField("", text: $model.text)
                .background(GeometryReader { proxy in
                    Color.clear
                        .randomModifier(of: proxy.safeAreaInsets)
                })
        }
    }
}

extension View {
    @ViewBuilder
    func randomModifier<T>(of value: T) -> some View where T: Equatable {
        if #available(iOS 17.0, *) {
            self
        } else {
            fatalError() // We don't care here
        }
    }
}

@main
struct TCABugApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView(model: .init())
        }
    }
}

Perception version information

1.1.2

Destination operating system

iOS 14.0

Xcode version information

Xcode 15.3

Swift Compiler version information

swift-driver version: 1.90.11.1 Apple Swift version 5.10 (swiftlang-5.10.0.13 clang-1500.3.9.4)
Target: arm64-apple-macosx14.0

[stephencelis]

@arnauddorgans I can't seem to reproduce this on 1.1.3 / main. Can you confirm that it's been fixed and close this out, or can you please submit a failing test case?

[stephencelis]

Ah never mind, I couldn't reproduce it in our unit test suite but I was able to reproduce it in an app. Very strange! Will look into it!