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Won't Fix

Votes

2

Found in

2018.2.0a8

Issue ID

1024441

Regression

No

NullReferenceException after undoing creation of InputField in Play mode while it is focused

uGUI

-

Steps to reproduce:
1. Create a new project or new scene in Unity
2. Create UI -> Input Field in Hierarchy
3. Enter Play mode
4. Click on Input Field in Game view to focus it (caret appears)
5. Press Ctrl+Z or Cmd+Z a few times until the created Input Field is removed

Expected results:
No NullReferenceException is thrown
Actual results:
NullReferenceException is thrown

Reproduced on:
2018.2.0a8, 2018.1.0f1, 2017.4.1f1, 2017.2.2p3

Error:
NullReferenceException: Object reference not set to an instance of an object
UnityEngine.UI.InputField.GenerateCaret (UnityEngine.UI.VertexHelper vbo, Vector2 roundingOffset) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/InputField.cs:1981)
UnityEngine.UI.InputField.OnFillVBO (UnityEngine.Mesh vbo) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/InputField.cs:1911)
UnityEngine.UI.InputField.UpdateGeometry () (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/InputField.cs:1872)
UnityEngine.UI.InputField.Rebuild (CanvasUpdate update) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/InputField.cs:1830)
UnityEngine.UI.CanvasUpdateRegistry.PerformUpdate () (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/CanvasUpdateRegistry.cs:149)
UnityEditor.Undo:Internal_CallWillFlushUndoRecord()

  1. Resolution Note:

    low priority defect, unlikely to be resolved in the near future. Closing for now.

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Comments (3)

  1. a436t4ataf

    Sep 04, 2019 10:32

    Could this be a side-effect of the bug(s) around VertexHelper not being serialized correctly? e.g. on recompile, VH references often get nuked for no apparent reason.

    If so ... the WONTFIX here is particularly unhelpful (fixing the bug would have also prevented/fixed other bugs, instead of ignoring a problem that you knew was in your codebase)

  2. mxoconnell

    Feb 17, 2019 10:44

    same thing on 2017.4.15f1

  3. Satscape

    Dec 12, 2018 14:50

    I think I'm having the same issue, 100s of these while in play mode:

    NullReferenceException: Object reference not set to an instance of an object
    UnityEngine.UI.InputField.GenerateCaret (UnityEngine.UI.VertexHelper vbo, Vector2 roundingOffset) (at /home/builduser/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/InputField.cs:2030)
    UnityEngine.UI.InputField.OnFillVBO (UnityEngine.Mesh vbo) (at /home/builduser/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/InputField.cs:1960)
    UnityEngine.UI.InputField.UpdateGeometry () (at /home/builduser/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/InputField.cs:1921)
    UnityEngine.UI.InputField.Rebuild (CanvasUpdate update) (at /home/builduser/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/InputField.cs:1879)
    UnityEngine.UI.CanvasUpdateRegistry.PerformUpdate () (at /home/builduser/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/CanvasUpdateRegistry.cs:150)
    UnityEngine.Canvas:SendWillRenderCanvases()

    Unity version 2018.2.18f1
    Any way to suppress it until fixed, as it's hard to track my own exceptions when the log is full of this.

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