[wasm][debugger] Crash/assert when stepping out from an async method

[radical]

I changed aspnetcore's StandaloneApp's Counter.razor to:

@code {
    static HttpClient client = new HttpClient();
    int currentCount = 0;

    async Task IncrementCount()
    {
	        currentCount ++;
                await JustWaitAsync("foobar");
    }

    async Task<HttpStatusCode> JustWaitAsync(string some)
    {
        var resp = await client.GetAsync("http://localhost:8080");
        Console.WriteLine($"resp: {resp}"); /// BP at this line

        return resp.StatusCode;
    }
}

I set a breakpoint at CWL after GetAsync. Once that is hit, then I hit step-over twice, to step over the closing brace for JustWaitAsync, and then I get:
: /Users/radical/dev/runtime/src/mono/mono/mini/mini-wasm-debugger.c:248 <disabled>
.. which corresponds to g_error ("set_set_notification_for_wait_completion_flag");

I'm trying this with my https://github.com/radical/runtime/tree/debugger-5.0-rc2 branch.

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[radical]

/cc @lewing @thaystg

[thaystg]

Working on it! :)