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Fixed in 2021.1.X

Fixed in 2020.1.X, 2020.2.X

Votes

0

Found in

2019.4

2020.1

2020.2

2020.2.0b8

2021.1

Issue ID

1288561

Regression

No

Crash when optimizing Mesh which contains overlapped indices in sub meshes

Graphics - LowLevel

-

Reproduction steps:
1. Open attached project ("MeshOptimizeCrash-2020.2.zip")
2. Click on the "Run" menu option (Test/Run)

Expected result: Editor does not crash
Actual result: Editor crashes with stack trace:

0x00007FF65254A593 (Unity) Mesh::SetIndexData
0x00007FF65254AA23 (Unity) Mesh::SetIndicesComplex
0x00007FF65256F8E3 (Unity) OptimizeTypedIndexBuffers<unsigned int>
0x00007FF65254451E (Unity) Mesh::Optimize
0x00007FF652DFADA2 (Unity) Mesh_CUSTOM_OptimizeImpl
...

Reproducible with: 2019.3.0b1, 2019.4.14f1, 2020.1.13f1, 2020.2.0b11, 2021.1.0a5
Could not test with:2019.3.0a12 and earlier versions due to multiple compilation errors (e.g. "The type or namespace name 'SubMeshDescriptor' does not exist in the namespace 'UnityEngine.Rendering'")

  1. Response avatar

    Resolution Note (fix version 2021.1):

    Fixed with 2021.1.0a8, backported 2020.2.1f1, 2020.1.16f1

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