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SwiftEvolution

A collection of 2 issues

withTaskCancellationShield: Making Swift's Cleanup Code Actually Run (SE-0504, Swift 6.4)

Ever wrap a token revoke, a lock release, or a rollback in defer, only to have that exact call skip itself the moment the task gets cancelled? It's not a bug in your code — it's how cancellation is supposed to work, and it's exactly

Async defer in Swift 6.4: What SE-0493 Actually Changes

Cleanup code that needs to await something — releasing a pooled connection, closing a socket, flushing a buffer to disk — has never had a clean home in Swift. defer was built exactly for scope-based cleanup, but until now it couldn't do asynchronous work, so that cleanup ended up