Fix 392308 - bad StopIteration instanceof behavior
Fix 392308 - bad StopIteration instanceof behavior

ashwinrayaprolu1984/rhino,sainaen/rhino,sam/htmlunit-rhino-fork,qhanam/rhino,tejassaoji/RhinoCoarseTainting,ashwinrayaprolu1984/rhino,sainaen/rhino,tejassaoji/RhinoCoarseTainting,swannodette/rhino,tejassaoji/RhinoCoarseTainting,Pilarbrist/rhino,rasmuserik/rhino,AlexTrotsenko/rhino,Pilarbrist/rhino,lv7777/egit_test,Pilarbrist/rhino,sainaen/rhino,tntim96/rhino-jscover,qhanam/rhino,AlexTrotsenko/rhino,ashwinrayaprolu1984/rhino,Pilarbrist/rhino,lv7777/egit_test,tntim96/rhino-apigee,Angelfirenze/rhino,AlexTrotsenko/rhino,Pilarbrist/rhino,swannodette/rhino,Angelfirenze/rhino,lv7777/egit_test,tuchida/rhino,qhanam/rhino,swannodette/rhino,tntim96/rhino-apigee,Angelfirenze/rhino,tuchida/rhino,tuchida/rhino,Angelfirenze/rhino,AlexTrotsenko/rhino,rasmuserik/rhino,sainaen/rhino,InstantWebP2P/rhino-android,Angelfirenze/rhino,tuchida/rhino,tntim96/htmlunit-rhino-fork,tejassaoji/RhinoCoarseTainting,sam/htmlunit-rhino-fork,AlexTrotsenko/rhino,tntim96/htmlunit-rhino-fork,tntim96/rhino-jscover,Pilarbrist/rhino,tuchida/rhino,tntim96/rhino-jscover-repackaged,sainaen/rhino,Distrotech/rhino,swannodette/rhino,tuchida/rhino,jsdoc3/rhino,InstantWebP2P/rhino-android,Angelfirenze/rhino,tejassaoji/RhinoCoarseTainting,jsdoc3/rhino,swannodette/rhino,tejassaoji/RhinoCoarseTainting,Pilarbrist/rhino,sam/htmlunit-rhino-fork,sam/htmlunit-rhino-fork,jsdoc3/rhino,sainaen/rhino,lv7777/egit_test,sam/htmlunit-rhino-fork,tejassaoji/RhinoCoarseTainting,tntim96/rhino-jscover-repackaged,swannodette/rhino,qhanam/rhino,lv7777/egit_test,swannodette/rhino,AlexTrotsenko/rhino,Distrotech/rhino,lv7777/egit_test,ashwinrayaprolu1984/rhino,tuchida/rhino,AlexTrotsenko/rhino,Angelfirenze/rhino,ashwinrayaprolu1984/rhino,ashwinrayaprolu1984/rhino,sainaen/rhino,tntim96/rhino-apigee,ashwinrayaprolu1984/rhino,sam/htmlunit-rhino-fork,sam/htmlunit-rhino-fork,lv7777/egit_test