What happens? Click spent though, leaving 3 clicks for the rest of the game even if no cards drawable anymore? runner loses game when no possibility of drawing but forced by wyldside?
The former. The runner doesn't lose when he has to draw but has no cards left; only the corp does. The Wyldside effect would still trigger as long as it stays in play -- you attempt (and fail) to draw two cards, then attempt (and succeed) to lose a click, and proceed with the rest of your turn with 3 clicks left.