zero compression yes Zero lol !

Tuning my motor after getting it all back together it just didn't want to idle in gear , found a dead cylinder -number 7 started by dropping a couple of drops of oil in it to seal the rings but nope zero compression still , backed off the exhaust adjuster half a turn and POP the valve snaps shut , run the pressure test alls good but of course the big question -was the valve over adjusted ? is the valve bent ? I've had a pushrod hang on the shoulder of an adjuster before and am hoping thats what happened here otherwise it's either going back to the builder for a 25k mile refresh or it's getting Aluminum heads .