NSTableViewDiffableDataSource causes a strong retain cycle
Originator: | AlexanderMomchilov | ||
Number: | rdar://FB8959397 | Date Originated: | 2021 Jan 2 |
Status: | Open | Resolved: | |
Product: | AppKit | Product Version: | macOS 11.1 (20C69) |
Classification: | Reproducible: | Yes |
This minimal code causes a retain cycle, even when the `tableView` and `dataSource` variables go out of scope ```swift let tableView = NSTableView() let dataSource = NSTableViewDiffableDataSource<String, String>( tableView: tableView) { (tableView, column, i, model) -> NSView in fatalError(“Stub for compilation, this closure will never be called”) } ``` It appears that `NSTableViewDiffableDataSource` captures its `wrapper` field (of type NSTableViewDiffableDataSourceWrapper) strongly, which in turn captures its `dataSource` field strongly. See the attached project for a simple demo.
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"Potential fix identified - For a future OS update"