# Strong ownership cycle without a valid termination

Rule ID: lifetime.ownership-cycle@1.0.0. Availability below refers to source-scan at product 524fa07e.

## V-LIFE-06 — Strong ownership cycle without a valid termination

Strong ownership cycle without a valid termination. It examines ownership, resource state, and lifetime obligations across program paths.

### Availability

Not available in source-scan. There is no source-scan flag to activate this condition.

A separate [experimental source preview](https://docs.swift-analyzer.com/guides/experimental/) recognizes a limited local pattern for this condition:

```text
"$ANALYZER" experimental-scan <path> --rule lifetime.stored-closure-self-cycle --format json
```

Use the terminal from [Installation](https://docs.swift-analyzer.com/get-started/installation/), with ANALYZER set, and replace `<path>` with a Swift file or directory. This preview is not compiler-backed source-scan coverage.

### Example and action

Illustrative pattern only. This is not a complete runnable package or a reproduced source-scan result. Helper APIs and omitted context must be supplied by the application.

```swift
self.callback = { self.refresh() }
```

Review the owner, transfer points and every exit path. Keep cleanup obligations and the valid lifetime explicit; avoid introducing a second cleanup or extending an invalid borrow.

```swift
self.callback = { [weak self] in self?.refresh() }
```

### Intended analysis

Intended reasoning: Track the resource identity, ownership or valid extent through creation, transfer, use and cleanup events. The intended decision requires evidence that those events refer to the same object and that the relevant paths are covered. Required evidence: ownership, lifetime, allocation, and resource-state facts

### Assumptions and unknown

The relevant facts must be admitted for the selected immutable build world. Unknown aliases, external effects, unsupported source forms or incomplete consumers can prevent a conclusion. Availability in this workflow is stated above; the illustration does not expand that availability.

### Evidence and interpretation

The target catalog describes the intended condition. It is not evidence of an active source-scan diagnostic.

Historical evidence at 4558458d: recovery-required (historical qualification is incomplete and needs further evidence). That evidence has not been requalified for this product revision.

[How we validate checks](https://docs.swift-analyzer.com/concepts/validation/) explains the evidence boundary. [Foundations](https://docs.swift-analyzer.com/concepts/foundations/) separates method assumptions from implementation claims.


---

Language: en
Canonical: https://docs.swift-analyzer.com/catalog/lifetime.ownership-cycle/
Product revision: 524fa07e0ae4153c84ac12ae9eb6559df89ec2be
Catalog revision: 4558458d
Documentation digest: 1f17ba58ab08627e0de898f1442067b09e960b48cd5605d6529e9275f8930d68
Channel: pre-prod; maturity: experimental; access: owner-provided checkout.