Windows Phone 8.1 C#应用:严重崩溃(ExecutionEngineException)仅在发布模式下的真实设备上

想象一下以下结构类型:

Imagine the following struct type:

public struct Token : IDictionary<string, Token>
{
    public readonly object Value;
    public Token(string str) { Value = str; }
    public Token(IDictionary<string, Token> dict) { Value = dict; }

    /* IDictionary<string, Token> implementation is here */
}

不要问我任何有关它的作用的信息.实现并不重要，您可以在所有方法/属性中引发NotImplementedException.它放置在单独的可移植类库中.

Don't ask me anything about what it does. Implementation doesn't matter, you can throw NotImplementedException in all methods/properties. It is placed in separate portable class library.

然后想象一下该结构的用法:

Then imagine the usage of this struct:

var token = new Token("111");
var kvp = new KeyValuePair<string, Token>("aaa", token);
var val = kvp.Value.Value;
var t = val.GetType(); // XXX

此代码几乎可以在所有地方完美运行:

This code works perfectly almost everywhere:

• 在桌面应用程序/Windows服务中(未尝试过地铁"应用程序)
• 在任何模式下(发行版，调试版，有无调试器)在WinPhone 8.1模拟器上
• 在调试模式下的实际WinPhone 8.1设备(在Lumia 625上试用)上

但是，当我在RELEASE模式下在真正的WP 8.1设备(Lumia 625，最新更新)上运行此代码时，我在第XXX行收到了ExecutionEngineException异常，消息为An unhandled exception of type 'System.ExecutionEngineException' occurred in Unknown Module.，无法捕获此异常，并且不包含任何详细信息-应用会崩溃.

But when I run this code on real WP 8.1 device (Lumia 625, latest updates) in RELEASE mode, then I get ExecutionEngineException exception at line XXX with message An unhandled exception of type 'System.ExecutionEngineException' occurred in Unknown Module. This exception can't be caught and doesn't contain any details - app just crashes.

这是一个错误吗?还是WinPhone的已知限制?为什么它可以在模拟器上运行?所有这些奇怪的条件"都很重要:

Is this a bug? Or known limitations of WinPhone? Why it works on emulator? And all this strange "conditions" are important:

• Token必须是struct，而不是class
• 它必须实现IDictionary<K,V>，而不是其他任何接口(尝试过IList<Token>，ICollection)
• 必须将其放置在单独的可移植类库中.如果我在WP 8.1项目中将其移动-效果很好
• Token的实例必须放置在KeyValuePair<K,V>内部.如果您只是token.Value.GetType()-效果很好

• Token must be struct, not class
• It must implement IDictionary<K,V>, not any other interface (tried IList<Token>, ICollection)
• It must be placed in separate portable class library. If I move it in WP 8.1 project - it works fine
• Instance of Token must be placed inside KeyValuePair<K,V>. If you do just token.Value.GetType() - it works fine

我创建了VS 2013解决方案来重现这种情况.可以在此处下载>.

I created VS 2013 solution to reproduce this situation. It can be downloaded here.