Металлический addCompletedHandler вызывает сбой в Swift 6 (iOS) ⇐ IOS

[Anonymous]

Следующий код работает нормально при компиляции с помощью Swift 5, но дает сбой при компиляции с помощью Swift 6 (трассировка стека ниже). В методе draw закомментирование строки addCompletedHandler решает проблему. Я тестирую iOS 18.0 и вижу одинаковое поведение как в симуляторе, так и на устройстве. Что здесь происходит?
import Metal
import MetalKit
import UIKit

class ViewController: UIViewController {
@IBOutlet var metalView: MTKView!

private var commandQueue: MTLCommandQueue?

override func viewDidLoad() {
super.viewDidLoad()

guard let device = MTLCreateSystemDefaultDevice() else {
fatalError("expected a Metal device")
}
self.commandQueue = device.makeCommandQueue()

metalView.device = device
metalView.enableSetNeedsDisplay = true
metalView.isPaused = true
metalView.delegate = self
}
}

extension ViewController: MTKViewDelegate {
func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {}

func draw(in view: MTKView) {
guard let commandQueue,
let commandBuffer = commandQueue.makeCommandBuffer()
else { return }

commandBuffer.addCompletedHandler { _ in } // works with Swift 5, crashes with Swift 6

commandBuffer.commit()
}
}

Вот трассировка стека:
Thread 10 Queue : connection Queue (serial)
#0 0x000000010581c3f8 in _dispatch_assert_queue_fail ()
#1 0x000000010581c384 in dispatch_assert_queue ()
#2 0x00000002444c63e0 in swift_task_isCurrentExecutorImpl ()
#3 0x0000000104d71ec4 in closure #1 in ViewController.draw(in:) ()
#4 0x0000000104d71f58 in thunk for @escaping @callee_guaranteed (@guaranteed MTLCommandBuffer) -> () ()
#5 0x0000000105ef1950 in __47-[CaptureMTLCommandBuffer _preCommitWithIndex:]_block_invoke_2 ()
#6 0x00000001c50b35b0 in -[MTLToolsCommandBuffer invokeCompletedHandlers] ()
#7 0x000000019e94d444 in MTLDispatchListApply ()
#8 0x000000019e94f558 in -[_MTLCommandBuffer didCompleteWithStartTime:endTime:error:] ()
#9 0x000000019e95352c in -[_MTLCommandQueue commandBufferDidComplete:startTime:completionTime:error:] ()
#10 0x0000000226ef50b0 in handleMainConnectionReplies ()
#11 0x00000001800c9690 in _xpc_connection_call_event_handler ()
#12 0x00000001800cad90 in _xpc_connection_mach_event ()
#13 0x000000010581a86c in _dispatch_client_callout4 ()
#14 0x0000000105837950 in _dispatch_mach_msg_invoke ()
#15 0x0000000105822870 in _dispatch_lane_serial_drain ()
#16 0x0000000105838c10 in _dispatch_mach_invoke ()
#17 0x0000000105822870 in _dispatch_lane_serial_drain ()
#18 0x00000001058237b0 in _dispatch_lane_invoke ()
#19 0x00000001058301f0 in _dispatch_root_queue_drain_deferred_wlh ()
#20 0x000000010582f75c in _dispatch_workloop_worker_thread ()
#21 0x00000001050abb74 in _pthread_wqthread ()


Подробнее здесь: https://stackoverflow.com/questions/789 ... wift-6-ios