Linux Mint
GTX 1050
2.81 Alpha, hash b3b59e3b5657
Holdout button in outliner is ignored in Eevee.
To reproduce, open a new .blend, move the default cube into a new collection, enable the holdout restriction toggle in the outliner and toggle it for the new collection, then press F12. The cube is still visible. Expected behaviour: the cube should be invisible. (and should "erase" or "mask" objects behind it, just like in cycles)