System Information
Operating system: Windows 10
Graphics card: GTX1080Ti

Blender Version
Broken: 2.8 latest master

Short description of error
Local view doesn't work in Cycles viewport render, but works in Eevee and workbench. It doesn't work even when the local view is entered before launching Cycles viewport render.

Exact steps for others to reproduce the error
1, Open any scene with multiple objects
2, Make sure Cycles is set as a renderer
3, Switch viewport to rendered mode
4, Enter local view

Result: The rest of the scene is still rendered.

Expected: Cycles viewport renders only selected objects in local view.