**System Information**
Operating system: Windows 10 Pro
Graphics card: NVidia 980
**Blender Version**
Broken: 2.8 Beta
**Short description of error**
After using irregular light mode in eevee, then switch over to Cycles engine, it occured a crash. After reloading the file, it does not crash anymore in case of unknown situation.
**Exact steps for others to reproduce the error**
[<img src="https://blend-exchange.giantcowfilms.com/embedImage.png?bid=5689" />](https://blend-exchange.giantcowfilms.com/b/5689/)