> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/pointfreeco/swift-composable-architecture/llms.txt
> Use this file to discover all available pages before exploring further.

# Migrating to 1.18

> Stores now automatically cancel their in-flight effects when they deallocate. And another UIKit navigation helper has been introduced

## An effect lifecycle change

In previous versions of the Composable Architecture, a root store's effects continued to run even after the store's lifetime. In 1.18, this leak has been fixed, and a root store's effects will be cancelled when the store deallocates.

<Warning>
  **Breaking Change:** A root store's effects will now be cancelled when the store deallocates. This fixes a memory leak but may affect code that depended on the previous behavior.
</Warning>

If you depend on a store's fire-and-forget effect to outlive the store, for example if you want to ensure an analytics or persistence effect proceeds without cancellation, perform this work in an unstructured task, instead:

```diff theme={null}
 return .run { _ in
-  await analytics.track(/* ... */)
+  Task {
+    await analytics.track(/* ... */)
+  }
 }
```

## A UIKit navigation helper

Our [Swift Navigation](https://github.com/pointfreeco/swift-navigation) library ships with many UIKit tools, and the Composable Architecture integrates with many of them, but up till now it has lacked support for trait-based navigation by pushing an element of `StackState`.

This has been fixed with a new endpoint on the `push` trait that takes a `state` parameter:

```swift theme={null}
traitCollection.push(state: Path.State.detail(/* ... */))
```