EXC_BAD_ACCESS when running on macOS 13 and Xcode 15b about swift-distributed-actors

[yaglo]

After some digging I've found that it's the <Never> that is expected to be a Codable for _ActorRef<Never> and _ResolveContext<Never> is causing the issue.

If you add extension Never: Codable {} anywhere in DistributedCluster, the problem goes away on macOS 13 (13.6.2 in my case).

My guess is that even though SE-0396 was implemented in Swift 5.9, the runtime on macOS 13 doesn't have it, so it leads to undefined behaviour and the program crashing.

[akbashev]

Note that I'm not getting any crashes on Xcode 14 + latest Swift 5.9 dev snapshot.
So could be problem on Swift side and already fixed. 🤔

[ktoso]

Thanks I'll see if I can track that down - we fixed a missing lock around there, maybe I missed something

[akbashev]

Just FYI, checked latest Xcode 15b7 15A5229h and error is still there.

[akbashev]

Hm, not sure how to test it now as all of my devices been updated to macOS 14 🥲
Will keep it for a while and then can be closed I think...

[yaglo]

Getting the same error when running from the command line but not when running from Xcode.