Rhino (v5.14.522.8390) is repeatedly crashing when I use the Revolved Hole command. It is repeatable which I know helps the debuggers. I created a brand new file with a single square extrusion. The crash occurs when I first select one surface of the extrusion and then the Revolved Hole command. I discovered the bug accidentally when I selected a surface extrusion and meant to select the Round Hole command—which is directly below the Revolved Hole command on the menu.
I couldn’t figure out how to submit a bug report so I hope this helps.