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Fixed in Unity 2017.3.0f3



Found in


Issue ID




modifications.empty() error after creating object from prefab which has Aspect ratio fitter attached

Scene Management



Priority: 2Necessary for shipping a final release


Severity: 3Workaround is possible

Steps to reproduce:

1. Make a new project
2. Create a canvas
3. Create an empty child (a) on the canvas
4. Create an empty child (b) on object a
5. Add an 'Aspect Ratio Fitter' component to object b, set the Aspect Mode to 'Fit In Parent'
6. Make object a into a new prefab.
7. Drag this prefab onto the scene view and notice an error

Comments (7)

  1. 66f17332670efadd5d4afcf0bf3adf15?d=mm


    Jul 25, 2018 12:14

    Same in 2018.2.0f2

  2. F4f5bb2d9d4d955a890dab7302769c65?d=mm


    Jul 06, 2018 22:17

    This is still the issue with unity 2018.1.0f2...

    Wow unity, wow.

  3. Fb24485bc0c9e2f9da14f691727f0b3d?d=mm


    May 20, 2018 05:56

    Can second that this is still an issue

  4. C96bbf08b1c98fe3f83198d21298b61b?d=mm


    May 17, 2018 04:25

    This issue is still an issue in Unity 2018. Please unmark it as resolved and look back into the bug.

  5. 9ab01e57c300b19f86779f0d315b4050?d=mm


    May 14, 2018 17:55

    As I mentioned in this thread:

    This issue showed up after I updated my project to 2018.1.0f2 from 2017.3.1. The object in question is a Canvas prefab that has no children. I have posted a screenshot of a new project, new scene, and new Canvas prefab causing the same error, so I doubt it has anything to do with how my project is set up.

  6. 2099578d43f5160cd621955fc5477cc2?d=mm


    Dec 27, 2017 16:43

    Same issue on 5.6.4p4 as of 12-27-17:

  7. 184df6dac3983e9fde787abde05d09c0?d=mm


    Sep 25, 2017 15:34

    I have the same error on Unity 5.5.2f.

    On Unity 2017.2.0f Unity crashes on 7 step

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