Reproduction steps:
1. Open the attached project;
2. Try to open the "Jones" scene;

Actual results: editor crashes on the scene opening;
Expected results: the scene will be loaded without any crashes.

Reproduced on: 5.5.0f3, 5.6.0p4, 2017.1.0b3.
Not reproduced on: 5.4.4p3.

Note: the crash is caused by the OnDrawGizmos function in the TrackingPointTest.cs script. Commenting this function helps to open the scene without crashing. Also, Visage Tracker for Unity is used in this project.