Unity2018.3.0f2 OnAfterDeserialize

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  • January 2, 2019 at 12:09 pm #16956
    aronze
    Participant

      I’m working migrate on our project to Unity 2018.3.0f2 from 2017 LTS. Today, I just open my prefab on the prefab mode(Nested Prefab feature added 2018.3), and meet a following error:

      That prefab used to link animator but someday, someone delete animator, so index 2 is to be set 0 like this.

      Of course, I can fix to remove index 2 element, but doing before, I want to share this issues and talk about a few things.

      First, in the ISerializationCallbackReceiver.OnAfterDeserialize especially new prefab edit mode, can not use object equals operator. See error log stack. fsUnityObjectConverter line 70, ‘reference == null’ is not allowed.
      Second, this error log is only occurred in new prefab edit mode but runtime is not. Also runtime is not running deserialize right way without any logs.

      Could you give me something advices?

      January 14, 2019 at 7:15 pm #16959
      Gavalakis
      Keymaster

        Hello and sorry for the late reply due to xmas vacation.

        No matter how much I try, I am still unable to somehow reproduce a similar error from coming up. With that said, does replacing reference == null with ReferenceEquals(reference, null) solves the problem on your end? Doing this bypass the custom UnityEngine.Object op_Equality comparer that seems to be the cause here.

        Please let me know.
        Thank you and happy new year.

        January 15, 2019 at 6:59 am #16958
        aronze
        Participant

          Thanks and Happy New Year!

          Sorry, I was blame problematic prefabs and found problems caused our developer refactoring prefabs by code before one years ago. Under normal circumstances, we checked that it was rearranged.

          But, still nested prefab mode in Unity2018.3 also can be trigger next exception log:

          Reproducing steps below:

          1. Create New Prefab and change to prefab mode
          2. Add Blackboard/Animator components to new prefab root
          3. Add Animator Blackboard Variable and link animator
          4. Remove Animator

          Thanks

          January 17, 2019 at 8:43 pm #16957
          Gavalakis
          Keymaster

            Hello again,

            Thanks a lot for the reproduction steps. I was able to identify and solve the problem.

            To fix this, please open up ‘fsUnityObjectConverter’ and in ‘TryDeserialize’ method, ‘replace line of code:
            if ( reference == null || storageType.RTIsAssignableFrom(reference.GetType()) ) {

            with this:
            if ( ReferenceEquals(reference, null) || storageType.RTIsAssignableFrom(reference.GetType()) ) {

            Please let me know if that indeed works for you.
            Thanks.

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