Search Issue Tracker

Fixed in 2020.2.X



Found in


Issue ID




PrefabUtility.SaveAsPrefabAsset() freezes the editor when called from OnValidate() method



To reproduce:
1. Open any project
2. Import the script attached "CreatePrefab.cs" (or make your own: call PrefabUtility.SaveAsPrefabAsset() from method OnValidate())
3. Assign the script to a game object and pick a game object for the script's public field (ex.: freshly created 3d object)

Result: editor freezes on trying to validate script after changes have been made

Reproduced in: 2018.3.7f1, 2019.1.0b5, 2019.2.0a6

Note1: OnValidate() can also be checked by commenting out PrefabUtility.SaveAsPrefabAsset(), adding GameObject to script's public field and decommenting. OnValidate
will once again freeze the editor.
Note2: PrefabUtility not available on LTS

  1. Resolution Note (fix version 2020.2):

    Saving a prefab during OnValidate, physics trigger/contact, animation event callbacks, rendering callbacks is not allowed and is now handled and an error message is logged in the console.

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.