To reproduce:
1. Open attached Unity project "SpriteLightKit-master"
2. Click on SpriteLightKitDemo in Assets folder
3. Click on Either "SpriteLightKitScene" or "SpriteLightKitShadowScene"

Expected result: Scene should open without any errors or crashes
Actual result: Unity crashes instantly after clicking on either of the scenes

Regression first introduced in: 5.5.3p1
Reproduced on: 5.6.0f1, 5.6.0f3. 5.6.0p2, 2017.1.0b1
Not reproduced on: 5.4.0f3, 5.5.0f3, 5.5.3p1

Note: In script file "SpriteLightKit.cs" commenting out line 149 "UnityEngine.Object.DestroyImmediate( _texture );" prevents Unity from crashing