Operating system: Mac OS X 10.14.6
Graphics card: Radeon Pro 555X 4 GB
Broken: 2.81 master, 2019-11-21, as found on the splash screen)
Short description of error
After any mesh is selected, wireframe disappears from view, selections of meshes stops working, and objects cease to show up in EEVEE viewport (Cycles viewport still renders correctly).
Exact steps for others to reproduce the error
Open the Blend file, select any mesh using viewport. The bug will persist on any new Blend files until you open another existing Blend file.
Based on the default startup or an attached .blend file (as simple as possible).