--- a/js/src/frontend/BytecodeEmitter.cpp
+++ b/js/src/frontend/BytecodeEmitter.cpp
@@ -5377,21 +5377,25 @@ EmitCallOrNew(JSContext *cx, BytecodeEmi
             ParseNode *funNode = pn2->pn_next;
             while (funNode->pn_next)
                 funNode = funNode->pn_next;
             if (!EmitTree(cx, bce, funNode))
                 return false;
             ParseNode *receiver = pn2->pn_next;
             if (!EmitTree(cx, bce, receiver))
                 return false;
+            if (Emit1(cx, bce, JSOP_NOTEARG) < 0)
+                return false;
             bool oldEmittingForInit = bce->emittingForInit;
             bce->emittingForInit = false;
             for (ParseNode *argpn = receiver->pn_next; argpn != funNode; argpn = argpn->pn_next) {
                 if (!EmitTree(cx, bce, argpn))
                     return false;
+                if (Emit1(cx, bce, JSOP_NOTEARG) < 0)
+                    return false;
             }
             bce->emittingForInit = oldEmittingForInit;
             argc -= 2;
             emitArgs = false;
             break;
         }
         if (!EmitNameOp(cx, bce, pn2, callop))
             return false;