swift

c34795ee - [Concurrency] Diagnose captures of `self` in a task created in deinit.

[Concurrency] Diagnose captures of `self` in a task created in deinit. This is done by diagnosing captures of `self` in escaping `sending` or `@Sendable` closures inside a deinit, which almost certainly means `self` will outlive deinit at runtime, which is a fatal error. This is a common mistake to make when creating isolated tasks inside nonisolated deinits to workaround the lack of synchrnous isolated deinits in Swift 6. (cherry picked from commit 18b747c1815f5c82026b6c6e3a84a4b103fb74c5)