Sharing.PassthroughRelay memory leak

[denysdanyliukboosters]

Description

I discovered a memory leak issue with the @Shared component. Creating @Shared within a function creates numerous objects that are never deallocated. I have attached a simple code example that reproduces the issue by repeatedly tapping on a view, which creates new instances of @Shared.

Notably, this leak began appearing after version 2.1.1 and appears to be linked to this pull request.

Below is the Xcode memory graph after tapping five times:

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

import SwiftUI
import Sharing

struct ContentView: View {
    var body: some View {
        VStack {
            Image(systemName: "globe")
                .imageScale(.large)
                .foregroundStyle(.tint)
            Text("Hello, world!")
        }
        .padding()
        .onTapGesture {
            @Shared(.foo) var foo
            print("Tapped")
        }
    }
}

#Preview {
    ContentView()
}

extension SharedReaderKey where Self == AppStorageKey<Bool>.Default {
    public static var foo: Self {
        Self[
            .appStorage("foo"),
            default: false
        ]
    }
}

Sharing version information

2.1.1 - 2.3.3

Destination operating system

iOS 18

Xcode version information

16.2

Swift Compiler version information

swift-driver version: 1.115.1 Apple Swift version 6.0.3 (swiftlang-6.0.3.1.10 clang-1600.0.30.1)

[denysdanyliukboosters]

What do you think about this issue? Is it possible to resolve it? If so, could you please provide an estimated timeline for the fix?