Program.cs

using HotChocolate.Execution;
using Microsoft.Extensions.DependencyInjection;
using Repro;

const string Query = "{ items { reason { text } } }";

foreach (var itemCount in (int[])[1, 2]) {
    var provider = new ServiceCollection()
        .AddGraphQL()
        .AddReproTypes()
        .Services
        .AddSingleton(new ItemCount(itemCount))
        .BuildServiceProvider();

    var executor = await provider.GetRequiredService<IRequestExecutorProvider>().GetExecutorAsync();

    var sw = System.Diagnostics.Stopwatch.StartNew();
    var run = Task.Run(() => executor.ExecuteAsync(Query));

    Console.WriteLine(await Task.WhenAny(run, Task.Delay(5000)) == run
        ? $"items={itemCount}: finished after {sw.ElapsedMilliseconds} ms"
        : $"items={itemCount}: STUCK. No result after 5s");
}

Environment.Exit(0);