Steps to repro:

1. Create a scene with LODs where lower LODs are marked static to participate in the bake.
2. In the Lighting window click Generate Lighting to bake Lighting.

Expected result:
Lighting is baked successfully.

Actual result:
Baking stalls on 'Baking...' stage and no baked lightmaps are being added.

Notes:
- Reproducible in the custom build based on Unity 2018.2.0f2;
- The bug blocks the workflow of the Demo team.
- Could not retest in 2018.3 and 2019.1 as the repro project only works in 2018.2;
- The bug is also partially reproducible in FPSample project, but with different symptoms (OpenRL errors constantly fired in the console).