I have tried to plug a Geometry > Pointiness node then a Color Ramp to the Emissive input of the Metallic shader in the latest build at the time i am posting and nothing appears, i get a flat color.
It's a bit too early for this I think, there's lots of Cycles features that Eevee does not support yet. But will leave it to the Eevee developers to decide if they want to keep this open as a to do item.
Indeed, it's still early for this kind of report. Technically the bug is that we are exposing nodes that are not supported. But pointless is one of many. Closing it for now. Thanks for the report though.