Version tested: 2020.1.0a13 + 7.1.1 (from PacMan), 8.0.0 HDRP/Staging

Steps to reproduce:

Using 8.0.0

1) Create an HDRP template
2) Switch to Matcap mode
3) Observe Unity crashing (crash log attached)

OR

2) Create an empty scene with any 3d object, switch to Matcap mode
3) Observe that Matcap shader looks broken

Expected results: Same as windows, Matcap should not crash or have any glitches.

Bonus issue:

Using 7.1.1 from PacMan

1) Open HDRP template
2) Switch to Matcap mode
3) Observe that fps drops to 15-17fps, editor is almost unusable

Expected result: Matcap mode should work faster than regular lit mode.