Ole Begemann • 10/12/2022

Xcode 14.0 generates wrong concurrency code for macOS targets

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A technical article explaining a critical bug in Xcode 14.0 and 14.0.1 where the Swift 5.7 compiler, when targeting the older macOS 12.3 SDK, generates incorrect concurrency code. This breaks actor isolation and data safety guarantees. The post details the root cause (a missing @_unsafeInheritExecutor attribute) and advises developers to use Xcode 13.4.1 until Xcode 14.1 with the macOS 13 SDK is released.

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#concurrency #Swift #Xcode
Xcode 14.0 generates wrong concurrency code for macOS targets

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