“IndexOutOfRangeException: Index was outside the bounds of the array.” error is thrown when large Text (TMP) GameObject Overflow field is set to Ellipsis

Unity: Text (TextMeshPro)

Open

6.6.X

6.5.X

6.3.X

6.0.X

Fixed

6.7.X

6000.7.0a2

Won't Fix

6.4.X

Unity 6000.4 has reached its end of life and will not receive further updates. If you need additional fixes, please upgrade to a newer Unity version.

Reproduction steps:
1. Create a new project
2. Create Text - TextMeshPro GameObject (GameObject > UI (Canvas) > Text - TextMeshPro)
3. Enter long text into Text field in the Inspector
4. Change Font Size value to 1
5. Change Overflow to Ellipsis

Actual result: “IndexOutOfRangeException: Index was outside the bounds of the array” error is thrown
Expected result: No warnings or errors are thrown

Reproducible with: 6000.0.67f1, 6000.3.9f1, 6000.4.0b9, 6000.5.0a7

Reproduced on: macOS Sequoia 26.2 (M4)

Note:
Full error:

IndexOutOfRangeException: Index was outside the bounds of the array.
TMPro.TMP_Text.FillCharacterVertexBuffers (System.Int32 i) (at ./Library/PackageCache/com.unity.ugui@bb329a87fcdc/Runtime/TMP/TMP_Text.cs:5529)
TMPro.TextMeshProUGUI.GenerateTextMesh () (at ./Library/PackageCache/com.unity.ugui@bb329a87fcdc/Runtime/TMP/TextMeshProUGUI.cs:4914)
TMPro.TextMeshProUGUI.OnPreRenderCanvas () (at ./Library/PackageCache/com.unity.ugui@bb329a87fcdc/Runtime/TMP/TextMeshProUGUI.cs:2522)
TMPro.TextMeshProUGUI.Rebuild (UnityEngine.UI.CanvasUpdate update) (at ./Library/PackageCache/com.unity.ugui@bb329a87fcdc/Runtime/TMP/TextMeshProUGUI.cs:229)
UnityEngine.UI.CanvasUpdateRegistry.PerformUpdate () (at ./Library/PackageCache/com.unity.ugui@bb329a87fcdc/Runtime/UGUI/UI/Core/CanvasUpdateRegistry.cs:215)
UnityEngine.Canvas:SendWillRenderCanvases() (at /Users/bokken/build/output/unity/unity/Modules/UI/ScriptBindings/UICanvas.bindings.cs:121)

“IndexOutOfRangeException: Index was outside the bounds of the array.” error is thrown when large Text (TMP) GameObject Overflow field is set to Ellipsis

Unity: Text (TextMeshPro)

Open

Fixed

Won't Fix

Prioritise and Follow this issue

Have a workaround or additional info about this issue?

“IndexOutOfRangeException: Index was outside the bounds of the array.” error is thrown when large Text (TMP) GameObject Overflow field is set to Ellipsis

Unity: Text (TextMeshPro)

Statuses

Open

Fixed

Won't Fix

Resolution Notes

6.4.XWon't FixUnity 6000.4 has reached its end of life and will not receive further updates. If you need additional fixes, please upgrade to a newer Unity version.

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?