ios Issue on deserialization of System.Nullable<long>[]

[baldodavi]

Source/destination types

public class NullableTest {
    private System.Nullable<long>[] idsField;
    public System.Nullable<long>[] ids
    {
        get
        {
            return this.idsField;
        }
        set
        {
            this.idsField = value;
        }
    }
}

Source/destination JSON

{"ids":[15968,15962,15963,15964,15965,15966,15967]}

### Expected behavior

Deserialize in all available platform

### Actual behavior

on ios platform (with mscorlib cpp usage), android platform works perfectly

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ExecutionEngineException: Attempting to call method 'System.Collections.Generic.List`1[[System.Nullable`1[[System.Int64, mscorlib, Version=2.0.0.0, Culture=, PublicKeyToken=b77a5c561934e089]], mscorlib, Version=2.0.0.0, Culture=, PublicKeyToken=b77a5c561934e089]]::.ctor' for which no ahead of time (AOT) code was generated.
  at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
  at System.Reflection.MonoCMethod.Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
  at System.Reflection.ConstructorInfo.Invoke (System.Object[] parameters) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Utilities.LateBoundReflectionDelegateFactory+<>c__DisplayClass5_0`1[T].<CreateDefaultConstructor>b__1 () [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonArrayContract.CreateTemporaryCollection () [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateNewList (Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonArrayContract contract, Boolean& createdFromNonDefaultCreator) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateList (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.Object existingValue, System.String id) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue (Newtonsoft.Json.Serialization.JsonProperty property, Newtonsoft.Json.JsonConverter propertyConverter, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.JsonReader reader, System.Object target) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject (System.Object newObject, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.String id) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateList (IList list, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonArrayContract contract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, System.String id) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateList (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.Object existingValue, System.String id) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue (Newtonsoft.Json.Serialization.JsonProperty property, Newtonsoft.Json.JsonConverter propertyConverter, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.JsonReader reader, System.Object target) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject (System.Object newObject, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, System.String id) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Populate (Newtonsoft.Json.JsonReader reader, System.Object target) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.JsonSerializer.PopulateInternal (Newtonsoft.Json.JsonReader reader, System.Object target) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.JsonConvert.PopulateObject (System.String value, System.Object target, Newtonsoft.Json.JsonSerializerSettings settings) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.JsonConvert.PopulateObject (System.String value, System.Object target) [0x00000] in <filename unknown>:0 

Steps to reproduce

JsonConvert.Deserialize<T>(jsonText);
or
JsonConvert.PopulateObject(jsonText,new NullableText());

used on a c# ios Unity project using always il2cpp

[SugoiDev]

You can probably workaround that by using having a reference to a System.Collections.Generic.List< System.Nullable<long>> in your code. This will generate the proper missing class for you. Just create one such list in a method, or inherit a dummy class from it, and the proper code will be generated.

That happened because you only use an array of System.Nullable<long> but the serializer internally works with List< System.Nullable<long>>.

I'm also pasting a previous comment of mine below. I think that JSON.NET implementation has some workarounds for AOT, so it might be useful.

---

There's a supported JSON.NET package on the asset store. It used to be paid, but the developer made it free after a deal.

The developer from SaladLab (of this integration) has been missing for a long time now, so I don't recommend using it for new projects and, if possible, use the json solution from the asset store.

PARENTELEMENT, LLC JSON .NET For Unity

[baldodavi]

Really Thanks!