--- old/src/hotspot/share/prims/whitebox.cpp	Wed Nov  8 08:13:04 2017
+++ new/src/hotspot/share/prims/whitebox.cpp	Wed Nov  8 08:13:03 2017
@@ -661,9 +661,7 @@
   int  result() const { return _result; }
 
   void doit() {
-    ThreadsListHandle tlh;
-    JavaThreadIterator jti(tlh.list());
-    for (JavaThread* t = jti.first(); t != NULL; t = jti.next()) {
+    for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
       if (t->has_last_Java_frame()) {
         for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
           frame* f = fst.current();