To reproduce:
1. Open attached project
2. Click ATL sprite atlas, currently, the max texture is 512
3. Press Pack preview
4. Change Max texture to 256
5. Press the Play button
6. Press A on the keyboard, and notice that notice that only one of the 4 pages were loaded and the remaining are white
7. Stop the Play mode and change Max texture to 512
8. Press Pack preview

Actual result: Unity editor crashes
Expected result: Unity Editor should not crash and should show pack preview window

Reproduced in: 2017.4.12f1; 2018.3.0b2; 2018.3.0b4; 2019.1.0a3

Note:
Cant run on 2018.1 and 2018.2 because of error CS0122: `UnityEditor.Collaboration.RevisionData' is inaccessible due to its protection level
Note:
Attaching editor.log