Steps to repro:

1. Open attached project;
2. Click: Tools -> Load scenes for bake
3. In the Lighting window click Generate Lighting

Actual result:
Editor freezes in an infinite loop with "Integrate failed on Write Lighting job" error. See attached video.
Regression introduced in 2018.2.0.

Notes:
- Reproducible in 2019.2.0a9, 2019.1.0b8, 2018.3.0f10; 2018.2.21f1;
- Not reproducible in 2018.1.9f2, 2017.4.24f1;
- Reproducible when the master scene using either Enlighten or PLM; PLM, however, yields different errors.