Crashes with Iterator exception

[rahulmutt]

The code in:
https://gist.github.com/csierra/7c2f913a85680e55bb71df6e05bdd7c7

crashes with:

Exception in thread "main" java.util.NoSuchElementException
	at java.util.Vector$Itr.next(Vector.java:1140)
	at eta.runtime.thunk.UpdateFrame.mark(UpdateFrame.java:89)
	at eta.runtime.stg.Capability.threadPaused(Capability.java:629)
	at eta.runtime.stg.Capability.suspendThread(Capability.java:1077)
	at main.Main$lvlzus6T9.thunkEnter(Unknown Source)
	at eta.runtime.thunk.StgInd.enter(StgInd.java:12)
	at eta.runtime.stg.StgClosure.evaluate(StgClosure.java:23)
	at eta.runtime.apply.Apply$Ap0Fast.enter(Apply.java:34)
	at base.java.TopHandler$satzusI9KE.enter(Unknown Source)
	at eta.runtime.apply.StgFun.apply(StgFun.java:19)
	at eta.runtime.apply.Apply$ApVFast.enter(Apply.java:42)
	at eta.runtime.exception.StgException$Catch.enter(StgException.java:194)
	at base.java.TopHandler$runJava1.enter(Unknown Source)
	at base.java.TopHandler$runJava.enter(Unknown Source)
	at eta.runtime.apply.Apply$PAPApply.enter(Apply.java:231)
	at eta.runtime.apply.StgPAP.apply(StgPAP.java:131)
	at eta.runtime.apply.ApO.stackEnter(ApO.java:17)
	at eta.runtime.stg.StackFrame.enter(StackFrame.java:43)
	at eta.runtime.stg.StackFrame.enter(StackFrame.java:26)
	at eta.runtime.stg.StackFrame.enter(StackFrame.java:26)
	at eta.runtime.stg.Capability.schedule(Capability.java:260)
	at eta.runtime.RtsScheduler.scheduleWaitThread(RtsScheduler.java:57)
	at eta.runtime.Rts.evalJava(Rts.java:107)
	at eta.java.util.function.Function$Eta.apply(Unknown Source)
	at java.util.Optional.flatMap(Optional.java:241)
	at main.Main$main2.thunkEnter(Unknown Source)
	at eta.runtime.thunk.StgIndStatic.enter(StgIndStatic.java:27)
	at eta.runtime.stg.StgClosure.evaluate(StgClosure.java:23)
	at base.ghc.io.handle.Text$zdwa7.enter(Unknown Source)
	at base.ghc.io.handle.Text$hPutStr2.enter(Unknown Source)
	at main.Main$main1.enter(Unknown Source)
	at eta.runtime.apply.StgFun.apply(StgFun.java:19)
	at eta.runtime.apply.Apply$ApVFast.enter(Apply.java:42)
	at eta.runtime.exception.StgException$Catch.enter(StgException.java:194)
	at main.Main$main7.enter(Unknown Source)
	at main.Main$DZCmain.enter(Unknown Source)
	at eta.runtime.apply.StgFun.apply(StgFun.java:19)
	at eta.runtime.apply.ApV.stackEnter(ApV.java:12)
	at eta.runtime.stg.StackFrame.enter(StackFrame.java:43)
	at eta.runtime.stg.StackFrame.enter(StackFrame.java:26)
	at eta.runtime.stg.Capability.schedule(Capability.java:260)
	at eta.runtime.RtsScheduler.scheduleWaitThread(RtsScheduler.java:57)
	at eta.runtime.Rts.evalLazyIO(Rts.java:95)
	at eta.runtime.Rts.hsMain(Rts.java:38)
	at eta.main.main(Unknown Source)