Recursive Serialization is not supported error in editor when launching

Snippet from my editor log:

Code (text):

1. ...
2. [Package Manager] Done registering packages in 0.00s seconds
3. Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.)
4. (Filename: C:\buildslave\unity\build\Runtime/Serialize/PersistentManager.cpp Line: 1386)
5.  
6. Refreshing native plugins compatible for Editor in 1848.38 ms, found 0 plugins.
7. Preloading 0 native plugins for Editor in 0.00 ms.
8. IsTimeToCheckForNewEditor: Update time 1570563370 current 1570595333
9. Initialize engine version: 2019.3.0b6 (0612c96692fb)
10. ...

As you can see I got this weird Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.) error message in editor, ONLY at first launch. I could find info about this error type but not in this "short" form. Also there is no stacktrace, or more useful info about what causes this error.
In editor log, this is the only place where the error shows up.



How can I gather more info/stacktrace or anything which helps determine what causes this error.
I suppose it's there somewhere in my C# files, but I don't get any clue where it could be.
Help!

Thanks for advice!

Pex

 

Thanks @LeonhardP! I don't use ScriptedImporter. It started show this error after I added some prefab for UGUI elements. Also I have several ScriptableObject which interacts with editor inspector. But as I said, it shows up only the last couple of days. (I don't remember exactly, maybe after I updated to b6??)
The weird thing is that it's only shows at first launch of editor beta6. After that i never get this message. Also there is no message in standalone build, even at start of the .exe

Also this is very tough that Unity cannot show nay detailed error message or stacktrace. Why is that? I never see such a behavior before.

Our project is quite big, and as it will be a game for sell, I don't know "sharing" our stuff is a good idea, even with Unity dev team, however I can attach all the editor logs and reports, dumps. That's why I asked here. Is there a command parameter for Unity or switch or anything i can get more detailed error report?

Maybe this error is because of package manager? It suspicious that it shows up in quite top of editor log, scene even doesn't load.

Can you help me?

 

Okey... this is nuts and stupid.



If you put ANY type of UI component into Preset Manager, Unity will throw this Recursive Serialization exception.

You should pay me a reward fee for reveal this bug!

Please tell your developer colleagues to take care of this. Have a nice day!

ps.: also note, that user doesn't get any useful information/exception info/stacktrace or whatever about this type of error, please consider to improve your error handling/showing methods!

 

yeap, same with me. Removing item from Preset Manager, fixed error. Thank you @Pimpace

 

Hi Leonard
I am seeing the same trouble in Unity 2020.1.0b4 Beta version.
Attached screenshot.

 

Issue is definitely not fixed yet.
I am seeing the same trouble in Unity 2020.1.0b4 Beta version.
Attached screenshot.

 

The issue is still with the preset manager. This time go to where you project files are located and go to the ProjectSettings folder. Delete the PresetManager.asset file. Once you restart Unity the PresetManger.asset file will be recreated and the error should be gone for now. I'm not promising the error won't come back.
I hope this helps.

 

thanks tunisod, works so far.