runtime: The binary operator Add is not defined for the types 'System.Nullable`1[System.Byte]' and 'System.Nullable`1[System.Byte]'.

    enum MyEnum : byte
    {
        Value_1 = 1,
        Value_2 = 2
    }

    class Program
    {
        static void Main(string[] args)
        {
            dynamic d = MyEnum.Value_1;
            var x = d + null;
        }
    }

fails with following error (works as expected without dynamic)

Unhandled Exception: System.InvalidOperationException: The binary operator Add is not defined for the types 'System.Nullable`1[System.Byte]' and 'System.Nullable`1[System.Byte]'.
   at System.Linq.Expressions.Expression.GetUserDefinedBinaryOperatorOrThrow(ExpressionType binaryType, String name, Expression left, Expression right, Boolean liftToNull)
   at System.Linq.Expressions.Expression.Add(Expression left, Expression right, MethodInfo method)
   at Microsoft.CSharp.RuntimeBinder.ExpressionTreeCallRewriter.GenerateBinaryOperator(EXPRCALL pExpr)
   at Microsoft.CSharp.RuntimeBinder.ExpressionTreeCallRewriter.GetExpression(EXPR pExpr)
   at Microsoft.CSharp.RuntimeBinder.ExpressionTreeCallRewriter.GenerateConvert(EXPRCALL pExpr)
   at Microsoft.CSharp.RuntimeBinder.ExpressionTreeCallRewriter.VisitCALL(EXPRCALL pExpr)
   at Microsoft.CSharp.RuntimeBinder.Semantics.ExprVisitorBase.Dispatch(EXPR pExpr)
   at Microsoft.CSharp.RuntimeBinder.Semantics.ExprVisitorBase.Visit(EXPR pExpr)
   at Microsoft.CSharp.RuntimeBinder.ExpressionTreeCallRewriter.GenerateLambda(EXPRCALL pExpr)
   at Microsoft.CSharp.RuntimeBinder.ExpressionTreeCallRewriter.VisitCALL(EXPRCALL pExpr)
   at Microsoft.CSharp.RuntimeBinder.Semantics.ExprVisitorBase.Dispatch(EXPR pExpr)
   at Microsoft.CSharp.RuntimeBinder.Semantics.ExprVisitorBase.Visit(EXPR pExpr)
   at Microsoft.CSharp.RuntimeBinder.ExpressionTreeCallRewriter.Rewrite(TypeManager typeManager, EXPR pExpr, IEnumerable`1 listOfParameters)
   at Microsoft.CSharp.RuntimeBinder.RuntimeBinder.CreateExpressionTreeFromResult(IEnumerable`1 parameters, ArgumentObject[] arguments, Scope pScope, EXPR pResult)
   at Microsoft.CSharp.RuntimeBinder.RuntimeBinder.BindCore(DynamicMetaObjectBinder payload, IEnumerable`1 parameters, DynamicMetaObject[] args, DynamicMetaObject& deferredBinding)
   at Microsoft.CSharp.RuntimeBinder.RuntimeBinder.Bind(DynamicMetaObjectBinder payload, IEnumerable`1 parameters, DynamicMetaObject[] args, DynamicMetaObject& deferredBinding)
   at Microsoft.CSharp.RuntimeBinder.BinderHelper.Bind(DynamicMetaObjectBinder action, RuntimeBinder binder, IEnumerable`1 args, IEnumerable`1 arginfos, DynamicMetaObject onBindingError)
   at Microsoft.CSharp.RuntimeBinder.CSharpBinaryOperationBinder.FallbackBinaryOperation(DynamicMetaObject target, DynamicMetaObject arg, DynamicMetaObject errorSuggestion)
   at System.Dynamic.DynamicMetaObject.BindBinaryOperation(BinaryOperationBinder binder, DynamicMetaObject arg)
   at System.Dynamic.BinaryOperationBinder.Bind(DynamicMetaObject target, DynamicMetaObject[] args)
   at System.Dynamic.DynamicMetaObjectBinder.Bind(Object[] args, ReadOnlyCollection`1 parameters, LabelTarget returnLabel)
   at System.Runtime.CompilerServices.CallSiteBinder.BindCore[T](CallSite`1 site, Object[] args)
   at System.Dynamic.UpdateDelegates.UpdateAndExecute2[T0,T1,TRet](CallSite site, T0 arg0, T1 arg1)