[UWP] InvalidOperationException thrown on serializing a class has static field which is set a value on declaration

[dsuz]

Hello,
Let me report an issue.

ISSUE DESCRIPTION
Serialization fails with InvalidOperationException if:

• The class has static member variables
• Put values to static member variables on declaration
• Platform is UWP (*)

(*) I verified this works on Unity Editor.

ENVIRONMENT
MessagePack for CLI 0.7.0-beta1
Visual Studio 2015 Version 14.0.25123.00 Update 2
Windows 10

REPRO CODE
Put the following code and call Serialize() method.

    public class ClassHasStaticField
    {
        public string m_string;
#if NO_PROBLEM_PATTERN
        static int m_int;
#else
        static int m_int = 1000;
#endif

        public ClassHasStaticField()
        {
            m_string = "dummy";
            m_int = 1000;
        }
    }

    void Serialize()
    {
        ClassHasStaticField chsf = new ClassHasStaticField();
        MsgPack.Serialization.MessagePackSerializer serializer;
        byte[] byteArray;

        using (MemoryStream stream = new MemoryStream())
        {
            try
            {
                serializer = MsgPack.Serialization.MessagePackSerializer.Get(chsf.GetType());
                byteArray = serializer.PackSingleObject(chsf);
            }
            catch (Exception ex)
            {
                Debug.WriteLine("Exception caught: " + ex.ToString());
            }
        }
    }

EXPECTED RESULT
Serialized successfully.

ACTUAL RESULT
The following exception thrown:

Exception thrown: 'System.InvalidOperationException' in System.Linq.dll
Exception caught: System.InvalidOperationException: Sequence contains more than one matching element
   at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at MsgPack.ReflectionAbstractions.GetConstructor(TypeInfo source, Type[] parameteres)
   at MsgPack.ReflectionAbstractions.GetConstructor(Type source, Type[] parameteres)
   at MsgPack.Serialization.SerializationTarget.Prepare(SerializationContext context, Type targetType)
   at MsgPack.Serialization.ReflectionSerializers.ReflectionObjectMessagePackSerializer`1..ctor(SerializationContext context)
   at MsgPack.Serialization.MessagePackSerializer.CreateReflectionInternal[T](SerializationContext context, Type concreteType, PolymorphismSchema schema)
   at MsgPack.Serialization.SerializationContext.GetSerializer[T](Object providerParameter)
   at MsgPack.Serialization.SerializationContext.SerializerGetter`1.Get(SerializationContext context, Object providerParameter)
   at MsgPack.Serialization.SerializationContext.SerializerGetter.Get(SerializationContext context, Type targetType, Object providerParameter)
   at MsgPack.Serialization.SerializationContext.GetSerializer(Type targetType, Object providerParameter)
   at MsgPack.Serialization.MessagePackSerializer.Get(Type targetType, SerializationContext context, Object providerParameter)
   at MsgPack.Serialization.MessagePackSerializer.Get(Type targetType)
   at Serializer_for_UWP.MainPage.Serialize()

[yfakariya]

Sorry, it is a bug. I forgot exclude type initializer (a.k.a. .cctor/static constructor) to get default constructor.