UnassignedReferenceException when Child objects have components with unassigned Transform

[gw1108]

To recreate this open up Giles and make a .cs script like this:

public class DummyInspector : MonoBehaviour { public Transform DummyTransform; }

Create a prefab that is an empty parent object with a child object. The child object must have the DummyInspector.cs component.

Drag the parent object into Resources/LevelEditorPrefabs to create a prefab. If you try to save a Giles level with this object instantiated it'll throw a UnassignedReferenceException. Full stack trace would be something like this:

UnityEngine.UnassignedReferenceException: The variable theTransform of DummyTransform has not been assigned. You probably need to assign the theTransform variable of the DummyTransform script in the inspector. at (wrapper managed-to-native) UnityEngine.Transform:get_childCount () at UnityEngine.Transform+Enumerator.MoveNext () [0x00007] in C:\buildslave\unity\build\artifacts\generated\common\runtime\TransformBindings.gen.cs:448 at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList (Newtonsoft.Json.JsonWriter writer, IEnumerable values, Newtonsoft.Json.Serialization.JsonArrayContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x00108] in C:\Users\George\Downloads\Json.Net.Unity3D-master\Json.Net.Unity3D-master\src\Newtonsoft.Json\Serialization\JsonSerializerInternalWriter.cs:684 at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000fe] in C:\Users\George\Downloads\Json.Net.Unity3D-master\Json.Net.Unity3D-master\src\Newtonsoft.Json\Serialization\JsonSerializerInternalWriter.cs:179 at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeDictionary (Newtonsoft.Json.JsonWriter writer, IDictionary values, Newtonsoft.Json.Serialization.JsonDictionaryContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x00176] in C:\Users\George\Downloads\Json.Net.Unity3D-master\Json.Net.Unity3D-master\src\Newtonsoft.Json\Serialization\JsonSerializerInternalWriter.cs:1091 UnityEngine.Debug:LogError(Object) GILES.pb_Scene:SaveLevel() (at Assets/Lib Assets/GILES/Code/Scripts/pb_Scene.cs:151) GILES.pb_SaveSceneButton:Save(String) (at Assets/Lib Assets/GILES/Code/Scripts/GUI/Toolbar/pb_SaveSceneButton.cs:61) GILES.pb_SaveSceneButton:OnSave(String) (at Assets/Lib Assets/GILES/Code/Scripts/GUI/Toolbar/pb_SaveSceneButton.cs:35) GILES.Interface.pb_FileDialog:Save() (at Assets/Lib Assets/GILES/Code/Scripts/GUI/pb_FileDialog.cs:266) UnityEngine.EventSystems.EventSystem:Update()

When json is trying to serialize all the components it tries to serialize Transform/GameObject references that might be public in the inspector. Even though the values are null JSON evaluates them as not null.

Also, if you make the Child object a prefab then create a new Parent/Child prefab with the first prefab you won't get this error.

[gw1108]

I found a workaround by excluding the Transform and GameObject types in pb_Reflection.cs. Line 112 add a new condition for typeof(Transform) and typeof(GameObject).