Swift Concurrency: Feedback Wanted!

[ktoso (Konrad 'ktoso' Malawski 🐟🏴‍☠️)]

In Swift 5.5 we’re not fully enforcing the Sendable checks, we will enable these in Swift 6 — see here for a detailed writeup:

Concurrency in Swift 5 and 6

Hey all, Swift has always been designed to be safe-by-default. This informs runtime features like bounds checking, integer overflow checking, and automatic reference counting, and type system features like optionals. But this safety has never extended to data races, which are easily created in practice and hard to completely eliminate. An explicit goal of the concurrency effort for Swift 6 is to make safe-by-default also extend to data races. The type system and language model work together, t…