Is this a bug?

[itaiferber]

This might be the thread you're thinking of:

@MainActor behaves different on Windows and macOS

Using 6.0 toolchain on Windows and Xcode 16.0 RC1 on macOS this program gives different output: @main struct EntryPoint: AsyncParsableCommand { @MainActor mutating func run() async throws { print("Thread is main: \(Thread.isMainThread)") await withCheckedContinuation { con in DispatchQueue.main.async { print("Thread is main (queue): \(Thread.isMainThread)") con.resume() } } } } On macOS compiler complai…