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Debugging Async methods not working

See original GitHub issue

I install MrAdvice in my project and I have this code which I have no problem in debugging :

    class Program
    {
        static void Main()
        {
            Async().GetAwaiter().GetResult();
            Non_Async();
        }

        static async Task Async()
        {
            var foo = "bar";
            // can see foo in debug
        }

        static void Non_Async()
        {
            var foo = "bar";
            // can see foo in debug
        }
    }

when I add an Advice class to my code, I can no longer see local variables in async methods in debug mode.

    class Program
    {
        static void Main()
        {
            Async().GetAwaiter().GetResult();
            Non_Async();
        }

        static async Task Async()
        {
            var foo = "bar";
            // can NOT see foo in debug
        }

        static void Non_Async()
        {
            var foo = "bar";
            // can see foo in debug
        }
    }

   class AdviceA : Attribute, IMethodAdvice
    {
        public void Advise(MethodAdviceContext context)
        {
            Console.WriteLine("Entry From Advice A");
            context.Proceed();
            Console.WriteLine("Exit From Advice A");
        }
    }