To reproduce:

1. Download attached project "Parkour.zip" and open in Unity
2. Open "Main" scene
3. Enter Play mode

Expected Result: Unity Editor successfully enters to the Play mode
Actual Result: Unity Editor crashes

Notes:
- This issue appears both on Windows, OSX, and Standalone builds
- The stack trace is shared in the comments section
- If you disable all "Player1" gameObject components, it still crashes
- Workaround: If you add Character Controller to "Parkour Slayer.cs" "Controller" field on "Player1" gameObject, then everything works as expected

Reproduced on Unity 5.6.5p4, 2017.1.3p3, 2017.2.2p3, 2017.3.2f1, 2017.4.1f1, 2018.1.0f1 and 2018.2.0b1