字段未找到异常 [英] Field not found exception

问题描述

你好，



我想我发现了一个错误，其中合同代码正在优化我的一个变量。启用代码合同后，我收到此错误：
$


System.MissingFieldException未处理

 消息=未找到字段：'M6.Server.Threading.Worker._shouldStop'。

 来源= SF.Server.Engine

  StackTrace：

      在SF.Server.Engine.Utilities.SaveChangesWorker.DoWork（Object anObject）

       at System.Threading.ExecutionContext.runTryCode（Object userData）

      在System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup（TryCode代码，CleanupCode backoutCode，Object userData）

       at System.Threading.ExecutionContext.Run（ExecutionContext executionContext，ContextCallback callback，Object state，Boolean ignoreSyncCtx）

      在System.Threading.ExecutionContext.Run（ExecutionContext executionContext，ContextCallback回调，对象状态）

      在System.Threading.ThreadHelper.ThreadStart（Object obj）

  InnerException：
$


关闭运行时检查可以解决问题。我在Windows 7 x64下运行版本1.2.30312.0，.Net 4，VS2010。



添加[ContractVerification（false）]不会改变行为。



这里是代码：

Hello,

I think I have discovered a bug in which the contract code is optimizing away one of my variables. With code contracts enabled, I get this error:

System.MissingFieldException was unhandled
  Message=Field not found: 'M6.Server.Threading.Worker._shouldStop'.
  Source=SF.Server.Engine
  StackTrace:
       at SF.Server.Engine.Utilities.SaveChangesWorker.DoWork(Object anObject)
       at System.Threading.ExecutionContext.runTryCode(Object userData)
       at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart(Object obj)
  InnerException:

Turning off runtime checking fixes the problem. I am running version 1.2.30312.0, .Net 4, VS2010 under Windows 7 x64.

Adding [ContractVerification(false)] does not change the behavior.

Here’s the code:

  public interface IWorker
  {
    void DoWork(object anObject);
  }

  public enum WorkerState
  {
    Starting = 0,
    Started,
    Stopping,
    Stopped,
    Faulted
  }

  public class Worker : IWorker
  {
    public WorkerState State { get; set; }

    public virtual void DoWork(object anObject)
    {
      while (!_shouldStop)
      {
        // Do some work
      }

      // thread is stopping
      // Do some final work
    }

    public void RequestStop()
    {
      State = WorkerState.Stopping;
      _shouldStop = true;
    }

    protected volatile bool _shouldStop;
  }

public class SaveChangesWorker : Worker
{
    public override void DoWork(object anObject)
    {
      while (!_shouldStop)
      {

      } // while

    }
}

我不知道如何解决这个问题，除了停止使用我不想做的代码合同。



谢谢，b


Rick

I have no clue how to fix this other than stop using code contracts which I’d rather not do.

Thank you,

Rick

推荐答案

嗨瑞克，

你做过干净吗？重建？

我经常得到Exception'System.MissingFieldException'，当我只更改IDE中的一些代码并重新启动时，没有干净&重建。

I often get the Exception 'System.MissingFieldException', when I only change some code in the IDE and restart, without clean & rebuild.

 

此外，您的示例似乎不完整，主要在哪里？

Also your example doesn't seems to be complete, where is the main?

我确实尝试过，添加：

    static void Main(string[] args)

    {

      (new SaveChangesWorker()).DoWork(null);



    }

但是我没有得到例外。

这是什么项目类型？

but I don't get the Exception.

What Project type is this?

还需要测试其他什么吗？

Anything else needed to test?

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