Reproducible on:
5.4.2p3
5.4.2p2
5.4.2f2
5.4.1f1

Not Reproducible on:
(Unity hides all other windows at start)
5.6.0a2
5.5.0b10

(Works without hiding anything)
5.4.0f3
5.3.6f1
5.2.5f1

Reproduction Steps(See attached video):

1- Download the minimal reproduction project provided by tester or create a new project and arrange editor windows as shown in video.
2- Quit Unity.
3- Open Unity again and open the project. Asset store window should be over the game view. (Placement and size of asset store window are important. It should cover most of game view.)
4- Run the scene without doing anything else.

Expected Result: Scene should run without any problems.
What Happens: Editor crashes.

When you uncover game view once, or do anything else to make it updated, you should restart Unity to be able to reproduce. It doesn't happen if game view is not behind the asset store window since start.

There are three attempts in the attached video:
1- Reproducing bug.
2- How to avoid bug.
3- Reproducing bug again to confirm it still exists.