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Fixed in 2019.2

Fixed in 2018.3, 2019.1



Found in



Issue ID




TransformVerticesInnerLoop<1,0,0> crashes when using Asset Bundles that contains certain Objects which uses Mesh Compression

Asset Bundles


To reproduce:

1. Download attached project “" and open in Unity
2. Select Bundle > Output to output the Bundle
3. Open “CompressionCrash” scene
4. Enter to Play mode

Expected results: Unity Editor successfully enters to Play mode
Actual results: Unity Editor becomes "Not Responding" or Crashes

- This issue appears on both Windows and macOS
- Stack Trace is shared in Comments section
- To stop the dynamic batching and just see the Assert, comment out the instantiation of the second prefab (23 line) in Assets/Code/InstantiateTest.cs
- Workaround: Turn Mesh Compression off on the fbx
- Might be related to this case:

Reproduced on Unity 2018.3.0a2, 2018.3.2f1, 2019.1.0a14 and 2019.2.0a1
Not reproduced on Unity 2018.2.20f1 and 2018.3.0a1
Regression on Unity 2018.3.0a2

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