Circular references in the values contained in the list cannot be ignored.

[k-maru]

version 17.10.2

A stack overflow occurs when a value in the list is a circular reference. "ReferenceLoopHandling.Ignore" does not work. However, the same data can be serialized directly using JsonConvert.SerializeObject.

I verified this with the following code

public class A
{
   public List<B> Bs { get; set; } = new List<B>();
}

public class B
{
       public A A { get; set; }
}

[UsesVerify]
public class UnitTest1
{
    private A ListReferenceData()
    {
        var act = new A()
        {
            Bs = new List<B>()
        };
        act.Bs.Add(new B()
        {
            A = act
        });
        act.Bs.Add(new B()
        {
            A = act
        });
        return act;
    }
    
    [Fact] // Stack overflow
    public async Task List_IgnoreLoopReference()
    {
        var settings = new VerifySettings();
        settings.AddExtraSettings(jsonSetting =>
        {
            jsonSetting.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
        });
        await Verify(ListReferenceData(), settings);
    }

    [Fact] // OK
    public async Task List_SerializeNewtonJson()
    {
        var jsonString = JsonConvert.SerializeObject(ListReferenceData(), new JsonSerializerSettings()
        {
            ReferenceLoopHandling = ReferenceLoopHandling.Ignore
        });
        await VerifyJson(jsonString);
    }
}

Please see below for a more detailed code.
https://github.com/k-maru/verify_loop_reference

[SimonCropp]

can u try version 18.0.0-beta.3

[k-maru]

@SimonCropp

It worked perfectly! Thank you!

[SimonCropp]

@k-maru thanks for closing the loop :)