Log when no benchmarks were found

[SupinePandora43]

Right now BenchmarkDotNet produces an empty artifacts with no information what happened.

[adamsitnik]

I thought that we have already added handling for such cases. Could you please provide sample repro with an output?

[SupinePandora43]

I thought that we have already added handling for such cases. Could you please provide sample repro with an output?

public class Program {
    public static void Main(){
        BenchmarkRunner.Run<MyB>();
    }
}

public class MyB {
    public IEnumerable<string> TestArguments(){
        yield return "";
        yield return new string('i', 8192);
    }

    [ArgumentSource(nameof(TestArguments))]
    public void Bench1(string str){ }
}

[YegorStepanov]

PR already exists: #1911