编译器为匿名方法生成了错误的代码[MS BUG FIXED]

Che*_*hen 30 .net c# delegates cil anonymous-methods

请参阅以下代码:

public abstract class Base
{
    public virtual void Foo<T>() where T : class
    {
        Console.WriteLine("base");
    }
}

public class Derived : Base
{
    public override void Foo<T>()
    {
        Console.WriteLine("derived");
    }

    public void Bang()
    {
        Action bang = new Action(delegate { base.Foo<string>(); });
        bang();    //VerificationException is thrown
    }
}
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new Derived().Bang();抛出一个例外.在Bang我生成的方法生成的CIL里面:

call instance void ConsoleApp.Derived::'<>n__FabricatedMethod1'<string>()
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和编译器生成方法的签名:

method private hidebysig 
    instance void '<>n__FabricatedMethod1'<T> () cil managed 
{
    .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
        01 00 00 00
    )       
    .maxstack 8

    IL_0000: ldarg.0
    IL_0001: call instance void ConsoleApp.Base::Foo<!!T>()
    IL_0006: ret
}
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我认为正确的代码应该是'<>n__FabricatedMethod1'<class T>.这是一个错误吗?顺便说一句,没有使用delegate{ }(lambda表达式是相同的),代码可以正常使用语法糖.

Action good = new Action(base.Foo<string>());
good();  //fine
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编辑我在windows8 RTM,.net framework 4.5中使用VS2012 RTMRel

编辑此错误现已修复.

Che*_*hen 3

已确认为错误,现已修复

更新:Connect 文章不再存在。该错误已修复。