Reproduction steps:
1. Open the attached project "CVR.zip" on 5.6.0b11;
2. Go to the "Example Scene" folder and load "Example.unity" scene;
3. Try to enter a play mode;
4. Observe the crash;
5. Repeat 1-3 steps on 5.6.0b10;
6. Observe, that there is no crash, the scene works as expected.

Note: sometimes you have to enter a play mode more times, but it always ends up crashing.

Tested on: Windows 8.1 and Windows 10.

Not reproducible: 5.6.0b10 and lower.
Reproduced on: 5.6.0b11, 2017.1.0a3.