用的NullReferenceException Owin [英] NullReferenceException with Owin

问题描述

我刚刚克隆一个项目，一个新的机器，我得到一个难以调试的NullReferenceException 在一个MVC站点OWIN：

I've just cloned a project to a new machine and I'm getting a hard-to-debug NullReferenceException on a MVC site with OWIN:

[NullReferenceException: Object reference not set to an instance of an object.]
   Microsoft.Owin.Security.Cookies.<AuthenticateCoreAsync>d__0.MoveNext() +664
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
   System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() +24
   Microsoft.Owin.Security.Infrastructure.<BaseInitializeAsync>d__2.MoveNext() +860
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
   System.Runtime.CompilerServices.TaskAwaiter.GetResult() +21
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +427
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +22
   Microsoft.Owin.Host.SystemWeb.Infrastructure.ErrorState.Rethrow() +33
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End(IAsyncResult ar) +150
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.EndFinalWork(IAsyncResult ar) +42
   System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +415
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

之后

[assembly: OwinStartupAttribute(typeof(Website.Startup))]
namespace Website
{
    public partial class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            ConfigureAuth(app);
        }
    }
}

不过这就像我可以为F10ing分辨这引发异常后 - 它从来没有到达第一个控制器的构造

but that's as much as I can discern as F10ing after this throws the exception - it never reaches the constructor of the first controller.

有没有人经历过这种前和/或可以点我在什么可能是错误的原因的方向是什么？

Has anyone experienced this before and/or can point me in the direction of what could be the cause of the error?

推荐答案

从V2至V3似乎解决这​​个问题更新OWIN。

Updating OWIN from v2 to v3 seems to fix this issue.

这是值得注意的是，所有相关的OWIN包也应该被更新。

It's worth noting that all OWIN related packages should be updated too.

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