4.6.2 Newtonsoft Deserialization Problem

Hello,

We've been testing Unity 4.6.2 and encountered a deserialization bug that we'd like to know if is occurring for anyone else.

It's a simple case of serializing and deserializing a simple class that contains a string. It seems that the deserialized data is always NULL.

Author of the serialization library noted that any issues that he's heard about have been in IL2CPP and have been actively fixing them. Would like to know if anyone else has been having this issue with this simple case.

Thank you!

Jack



Here's the code:

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using Newtonsoft.Json;
public class Test : MonoBehaviour {
public class MyData
{
public string name;
}
// Use this for initialization
void Start () {
MyData[] testData = new MyData[3];
testData[0] = new MyData();
testData[0].name = "aaa";
testData[1] = new MyData();
testData[1].name = "bbb";
testData[2] = new MyData();
testData[2].name = "ccc";
string result = JsonConvert.SerializeObject(testData);
Debug.Log("json:" + result);
MyData[] convertedData = JsonConvert.DeserializeObject<MyData[]>(result);
for (int i = 0 ; i < convertedData.Length ; ++i)
Debug.Log("data(" + i + "):" + convertedData.name);
}

// Update is called once per frame
void Update () {

}
}

And here is the resulting output:

Initialize engine version: 4.6.2f1 (bd99309c2ad7)

Mono Class HideInInspector couldn't be found! This might lead to random crashes later on!


(Filename: Line: 114)


Unable to find type [UnityEngine.dll]UnityEngine.ResourceRequest


(Filename: Line: 34)


json:[{"tracks":null,"name":"aaa"},{"tracks":null,"name":"bbb"},{"tracks":null,"name":"ccc"}]

Replacements.Attribute:CheckParameters(Object, Type)

UnityEngine.Debug:Internal_Log(Int32, String, Object)

UnityEngine.Debug:Log(Object)

Test:Start()

Replacements.Attribute:CheckParameters(Object, Type)


(Filename: /Users/builduser/buildslave/unity/build/artifacts/iPhonePlayer-armv7-il2cppGenerated/UnityEngineDebug.cpp Line: 56)


data(0):

Replacements.Attribute:CheckParameters(Object, Type)

UnityEngine.Debug:Internal_Log(Int32, String, Object)

UnityEngine.Debug:Log(Object)

Test:Start()

Replacements.Attribute:CheckParameters(Object, Type)


(Filename: /Users/builduser/buildslave/unity/build/artifacts/iPhonePlayer-armv7-il2cppGenerated/UnityEngineDebug.cpp Line: 56)


data(1):

Replacements.Attribute:CheckParameters(Object, Type)

UnityEngine.Debug:Internal_Log(Int32, String, Object)

UnityEngine.Debug:Log(Object)

Test:Start()

Replacements.Attribute:CheckParameters(Object, Type)


(Filename: /Users/builduser/buildslave/unity/build/artifacts/iPhonePlayer-armv7-il2cppGenerated/UnityEngineDebug.cpp Line: 56)


data(2):

Replacements.Attribute:CheckParameters(Object, Type)

UnityEngine.Debug:Internal_Log(Int32, String, Object)

UnityEngine.Debug:Log(Object)

Test:Start()

Replacements.Attribute:CheckParameters(Object, Type)


(Filename: /Users/builduser/buildslave/unity/build/artifacts/iPhonePlayer-armv7-il2cppGenerated/UnityEngineDebug.cpp Line: 56)

​

 

Sorry, the log that I attached may not match the sample program, but the results are the same. Trying to access string "name" in class MyData displays an empty string.

Jack

 

Discovered that if we used a List instead of array then it deserialized correctly.

Thanks.

Jack

 

He is using my asset. Collections seem to be a problem for il2cpp still. Arrays and multidimensional arrays fail to deserialize. Also, LinkedList<T> fails on the call to MakeGenericType. These all work fine when targeting mono, even on IOS, but when switching to il2cpp fail. The code in my asset that executes is exactly the same for both when building for IOS.

 

Probably not. I asked him to submit one so ill check but this was just yesterday so less than 24 hours ago. He replaced his linked list with a multidimensional array and had the same result as Jack.

 

Hi folks,

Update -- it is Case 669523

I just submitted a simple test case using the Bug Reporter. It includes Dustin's JSON serialisation asset that we are using.



Let me know if you need any more information. Thanks!

Jack

 

Thanks Tautvydas. If you need me to get you specific repros put together for anything let me know and I'd be happy to put some together.

 

Interesting. I've also got a user having some similar issues (List<List<Class>>). (I use FullSerializer as my backend) - He downgraded to 4.6.1 and the issues disappeared. So it's definitely a Unity thing, and not related to custom serializers.

 

was this ever fixed?

 

Not sure. I should put together some additional tests. There are still some unresolved IL2CPP issues that I need to get bugs submitted for but not sure on this particular one.