Swift 6 + CGImage: How Do I Silence This Error?

[bdkjones (Bryan)]

In my app, I use AVFoundation to snap images of certain frames of video files. I cache those images by their frame number. I do this with TaskGroup and concurrency. Here's an extremely simplified example that shows the error I'm fighting:

CGImage explicitly conforms to @unchecked Sendable for macOS 10.9+ and the documentation declares it to be thread-safe. But using it here produces this warning/error and this is the last error stopping me from adopting Swift 6 language mode in this project.

If I replace CGImage with some other Sendable type, the error disappears, of course. But I want CGImage because I take each of these and run them through the Vision framework to find text snippets, and Vision requires CGImage inputs.

I'm running Xcode 16 Beta 2.

[nh7a]

I'm expecting this to be fixed by Beta 3 or 4.

Use `withThrowingTaskGroup` within Actor leads to `Non-sendable type '(inout ThrowingTaskGroup<Void, any Error>) async throws -> ()'` compilation warning

The fix is a combination of very recent changes, I don't expect it to be in beta 2 but we expect this error to go away in subsequent releases. I can't comment on exact release dates though, sorry about that.

[bdkjones (Bryan)]

Let's just say that Beta 3 did not improve the situation. That one error is gone and there are now 15 in its place: