Observe method leak

[juliensagot]

Description

Hi folks 👋 It appears that the observe method is leaking, even when self is properly weakified inside the trailing closure, unless I'm doing some silly things.

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I've attached a sample macOS project where you can easily repro the issue: TCAPerceptionLeakSampleProject.zip

Checklist

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

Expected behavior

No response

Actual behavior

No response

Steps to reproduce

• launch the sample project
• attach Instruments using the Leaks template
• press the Increment button

The Composable Architecture version information

1.9.2

Destination operating system

14.4 (23E214)

Xcode version information

Version 15.3 (15E204a)

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

[mbrandonw]

Hi @juliensagot, this most likely will be fixed when this PR of swift-perception is merged.

Could you help us verify this by adding an explicit dependency on swift-perception to your project and pinning it to the explicit-animation branch?

[juliensagot]

@mbrandonw Done! Unfortunately, I'm experiencing the same leaks:

[mbrandonw]

Hi @juliensagot, how exactly can I reproduce the problem? I've run the app, increment the counter, and I don't see any leaks:

Also, are you sure you are running the leaks instrument in DEBUG? Because the object that is showing up in your screenshot, LockIsolated, is only used in DEBUG mode:

https://github.com/pointfreeco/swift-perception/blob/db087559dcc50eedebdc7df6a0fb0c1e188e4229/Sources/Perception/PerceptionRegistrar.swift#L18-L21

[juliensagot]

Oh no, you are right, I was somehow profiling the app in debug mode…
There are indeed no leaks! I'll close the issue, sorry 😅