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Fixed in 2019.1.X

Fixed in 2018.3.X



Found in


Issue ID




Crash in CalculateSurfaceArea after opening the project with certain mesh

Progressive Lightmapper


Steps to repro:
1. Open attached project.

Expected result:
Project opens without crashes.

Actual result:
Editor crashes.
Regression introduced in Unity 2018.2.0b10.

Last calls from the stacktrace:
0x0000000140843914 (Unity) CalculateSurfaceArea
0x0000000140843325 (Unity) CalculateNormalizedLightmapArea
0x0000000140833D39 (Unity) MeshRenderer::GetCachedNormalizedLightmapArea
0x0000000141147FA5 (Unity) AddInstance
0x000000014114EA78 (Unity) ExtractGIInstances
0x0000000141162911 (Unity) GISceneManager::GetGeometries

- Reproducible in 2018.2.5f1, 2018.2.0b10;
- Not reproducible in 2018.3.0a9, 2018.2.0b9, 2018.1.9f1, 2017.4.9f1, 2017.2.3p3;
- Reproducible on Windows and OSX;
- Opening the project in 2018.3.0b9 and earlier fixes the issue;
- In the latest 2018.3 reference to the prefab that's causing the bug is broken, so the bug might be masked out in this version.

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