Search Unity

  1. Unity 2018.3 is now released.
    Dismiss Notice
  2. The Unity Pro & Visual Studio Professional Bundle gives you the tools you need to develop faster & collaborate more efficiently. Learn more.
    Dismiss Notice
  3. We've updated our Terms of Service. Please read our blog post from Unity CTO and Co-Founder Joachim Ante here
    Dismiss Notice
  4. Want to provide direct feedback to the Unity team? Join the Unity Advisory Panel.
    Dismiss Notice
  5. Improve your Unity skills with a certified instructor in a private, interactive classroom. Watch the overview now.
    Dismiss Notice

(Case 1108041) AddComponent to Prefab in AssetPostprocessor causes assertion

Discussion in 'Prefabs' started by Peter77, Dec 9, 2018.

  1. Peter77

    Peter77

    Joined:
    Jun 12, 2013
    Posts:
    3,046
    Adding a Component to a Prefab in an AssetPostprocessor, causes the editor to trigger an assertion. This used to work in Unity prior 2018.3.

    Reproduce
    1) Open attached user project
    2) Click "GameObject > 3D Object > Cube"
    3) Drag&drop "Cube" from Hierarchy to Project to create a prefab of it

    Actual
    The editor outputs Assertion failed on expression: '!go.TestHideFlag(Object::kNotEditable)'

    Expected
    No error.


    Code (CSharp):
    1. Assertion failed on expression: '!go.TestHideFlag(Object::kNotEditable)'
    2.  
    3. UnityEngine.GameObject:Internal_AddComponentWithType()
    4. UnityEngine.GameObject:AddComponent(Type) (at C:\buildslave\unity\build\Runtime\Export\GameObject.bindings.cs:221)
    5. UnityEngine.GameObject:AddComponent() (at C:\buildslave\unity\build\Runtime\Export\GameObject.bindings.cs:226)
    6. PrefabReferenceProcessor:OnPostprocessInternal(String) (at Assets\Editor\PrefabReferenceProcessor.cs:48)
    7. PrefabReferenceProcessor:OnPostprocessAllAssets(String[], String[], String[], String[]) (at Assets\Editor\PrefabReferenceProcessor.cs:33)
    8. System.Reflection.MonoMethod:InternalInvoke()
    9. System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
    10. System.Reflection.MethodBase:Invoke(Object, Object[])
    11. UnityEditor.AssetPostprocessingInternal:PostprocessAllAssets(String[], String[], String[], String[], String[]) (at C:\buildslave\unity\build\Editor\Mono\AssetPostprocessor.cs:141)
    12. UnityEditorInternal.InternalEditorUtility:ProjectWindowDrag()
    13. UnityEditor.LocalGroup:DoDrag(Int32, Boolean) (at C:\buildslave\unity\build\Editor\Mono\ObjectListLocalGroup.cs:1247)
    14. UnityEditor.LocalGroup:HandleUnusedDragEvents(Single) (at C:\buildslave\unity\build\Editor\Mono\ObjectListLocalGroup.cs:270)
    15. UnityEditor.Group:Draw(Single, Vector2, Int32&) (at C:\buildslave\unity\build\Editor\Mono\ObjectListGroup.cs:161)
    16. UnityEditor.ObjectListArea:HandleListArea() (at C:\buildslave\unity\build\Editor\Mono\ObjectListArea.cs:1330)
    17. UnityEditor.ObjectListArea:OnGUI(Rect, Int32) (at C:\buildslave\unity\build\Editor\Mono\ObjectListArea.cs:541)
    18. UnityEditor.ProjectBrowser:OnGUI() (at C:\buildslave\unity\build\Editor\Mono\ProjectBrowser.cs:1965)
    19. System.Reflection.MonoMethod:InternalInvoke()
    20. System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
    21. System.Reflection.MethodBase:Invoke(Object, Object[])
    22. UnityEditor.HostView:Invoke(String, Object) (at C:\buildslave\unity\build\Editor\Mono\HostView.cs:342)
    23. UnityEditor.HostView:Invoke(String) (at C:\buildslave\unity\build\Editor\Mono\HostView.cs:336)
    24. UnityEditor.HostView:InvokeOnGUI(Rect, Rect) (at C:\buildslave\unity\build\Editor\Mono\HostView.cs:302)
    25. UnityEditor.DockArea:DrawView(Rect, Rect, Boolean, Boolean, Boolean) (at C:\buildslave\unity\build\Editor\Mono\GUI\DockArea.cs:363)
    26. UnityEditor.DockArea:OldOnGUI() (at C:\buildslave\unity\build\Editor\Mono\GUI\DockArea.cs:322)
    27. UnityEngine.Experimental.UIElements.IMGUIContainer:DoOnGUI(Event, Matrix4x4, Rect, Boolean) (at C:\buildslave\unity\build\Modules\UIElements\IMGUIContainer.cs:244)
    28. UnityEngine.Experimental.UIElements.IMGUIContainer:HandleIMGUIEvent(Event, Matrix4x4, Rect) (at C:\buildslave\unity\build\Modules\UIElements\IMGUIContainer.cs:438)
    29. UnityEngine.Experimental.UIElements.IMGUIContainer:HandleIMGUIEvent(Event) (at C:\buildslave\unity\build\Modules\UIElements\IMGUIContainer.cs:421)
    30. UnityEngine.Experimental.UIElements.IMGUIContainer:HandleEvent(EventBase) (at C:\buildslave\unity\build\Modules\UIElements\IMGUIContainer.cs:401)
    31. UnityEngine.Experimental.UIElements.EventDispatcher:PropagateEvent(EventBase) (at C:\buildslave\unity\build\Modules\UIElements\EventDispatcher.cs:754)
    32. UnityEngine.Experimental.UIElements.EventDispatcher:ProcessEvent(EventBase, IPanel) (at C:\buildslave\unity\build\Modules\UIElements\EventDispatcher.cs:599)
    33. UnityEngine.Experimental.UIElements.EventDispatcher:Dispatch(EventBase, IPanel, DispatchMode) (at C:\buildslave\unity\build\Modules\UIElements\EventDispatcher.cs:307)
    34. UnityEngine.Experimental.UIElements.BaseVisualElementPanel:SendEvent(EventBase, DispatchMode) (at C:\buildslave\unity\build\Modules\UIElements\Panel.cs:176)
    35. UnityEngine.Experimental.UIElements.UIElementsUtility:DoDispatch(BaseVisualElementPanel) (at C:\buildslave\unity\build\Modules\UIElements\UIElementsUtility.cs:245)
    36. UnityEngine.Experimental.UIElements.UIElementsUtility:ProcessEvent(Int32, IntPtr) (at C:\buildslave\unity\build\Modules\UIElements\UIElementsUtility.cs:68)
    37. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr) (at C:\buildslave\unity\build\Modules\IMGUI\GUIUtility.cs:179)
     
    LeonhardP likes this.
  2. quitebuttery

    quitebuttery

    Joined:
    Mar 12, 2011
    Posts:
    279
    I get this same error--in this case playmaker is causing it somehow.

    Code (CSharp):
    1. Assertion failed on expression: '!go.TestHideFlag(Object::kNotEditable)'
    2. UnityEngine.GameObject:AddComponent()
    3. PlayMakerFSM:GetEventHandlerComponent(GameObject) (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/PlayMakerFSM.cs:469)
    4. PlayMakerFSM:AddEventHandlerComponent() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/PlayMakerFSM.cs:447)
    5. PlayMakerFSM:AddEventHandlerComponents() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/PlayMakerFSM.cs:385)
    6. PlayMakerFSM:Preprocess() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/PlayMakerFSM.cs:225)
    7. HutongGames.PlayMakerEditor.PlayMakerBuildCallbacks:OnPostprocessScene() (at C:/Projects/Playmaker_1.9.0/Projects/Playmaker.source.unity/Assets/PlayMaker/Editor/PlayMakerBuildCallbacks.cs:34)
    8. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)