FaceDetector::CreateAsync DetectFacesAsync 创建异步任务各种异常

Question

create_task创建FaceDetector::CreateAsync()及DetectFacesAsync异步任务会报各种异常，参数错误，或者访问位置异常等，我的写法有什么问题，我该怎么等待并获取结果，c++20的co_wait可以实现，但是我的是uwpc++项目，需要zw编译，vs2022显示c++20和zw冲突

void FrameRenderer::DetectFace(SoftwareBitmap^ input) {
    static const BitmapPixelFormat InputPixelFormat = BitmapPixelFormat::Gray8;
    if (FaceDetector::IsBitmapPixelFormatSupported(InputPixelFormat) && !detectedFace)
    {
        if (input->PixelHeight > 0 && input->PixelWidth > 0)
        {
            try
            {
                std::shared_ptr<SoftwareBitmap^> detectorInput = std::make_shared<SoftwareBitmap^>(SoftwareBitmap::Convert(input, InputPixelFormat));
                if (detectorInput != nullptr && (*detectorInput)->PixelHeight > 0 && (*detectorInput)->PixelWidth > 0)
                {
                    static IAsyncOperation<FaceDetector^>^ createOp = FaceDetector::CreateAsync();
                    create_task(createOp)
                        .then([detectorInput, this](FaceDetector^ faceDetector)
                    {
                        OutputDebugString(L"detectorInput != nullptr");
                        static IAsyncOperation<IVector<DetectedFace^>^>^ op = faceDetector->DetectFacesAsync((*detectorInput));
                        return op;
                    }, task_continuation_context::use_current())
                        .then([this](IVector<DetectedFace^>^ faces)
                    {
                        if (faces != nullptr && faces->Size != 0)
                        {
                            //detectedFace = true;
                        }
                    }, task_continuation_context::use_current())
                        .then([](task<void> previousTask) {
                        try {
                            previousTask.get();
                        }
                        catch (Platform::InvalidArgumentException^ e)
                        {
                            OutputDebugString(e->Message->Data());
                        }
                        catch (Platform::Exception^ e)
                        {
                            OutputDebugString(e->Message->Data());
                        }
                    });
                }
            }
            catch (Platform::InvalidArgumentException^ e)
            {
                OutputDebugString(e->Message->Data());
            }
            catch (Platform::Exception^ e)
            {
                OutputDebugString(e->Message->Data());
            }
        }
    }
}