Failure to serialize Array on Async interop

[galvesribeiro]

Hello folks,

While updating the Storage extension to 0.5.0, I've found a potential bug with the async interop.

If I send an an array, lets say WeatherForecast[] from C# -> JS, it works just fine. When JS is sending back an array as return of of a method, the runtime just stops. Nothing happen. No errors, nothing.

To reproduce:

On a TS/JS:

  public GetItem(myArray: any): any {
    return myArray
  };

On C#:
That works:

        public WeatherForecast[] GetItem(WeatherForecast[] myArray)
        {
            return ((IJSInProcessRuntime)JSRuntime.Current).Invoke<WeatherForecast[]>("GetItem", myArray);
        }

That doesn't works:

        public Task<WeatherForecast[]> GetItem(WeatherForecast[] myArray)
        {
            return JSRuntime.Current.InvokeAsync<WeatherForecast[]>("GetItem", myArray);
        }

In other words... If we call it sync it works, but if we call async, it fail.

My first thought was something wrong with the serialization, but that works in the sync mode, so we discarded it.

We are suspecting endInvokeDotNetFromJS isn't being caller or is failing somehow.

I would appreciate any help on that.

Thanks

[galvesribeiro]

As this is a blocker, I'm changing the code to internally send a string with the array JSON-serialized for now while we don't have a solution for it.

[galvesribeiro]

Thanks for the quick fix! 👍

Looking forward for 0.5.1