--- a/hotspot/src/share/vm/runtime/thread.cpp	Fri Jul 07 23:04:06 2017 +0200
+++ b/hotspot/src/share/vm/runtime/thread.cpp	Fri Jul 07 23:11:33 2017 +0200
@@ -1200,7 +1200,7 @@
 bool WatcherThread::_startable = false;
 volatile bool  WatcherThread::_should_terminate = false;
 
-WatcherThread::WatcherThread() : Thread(), _crash_protection(NULL) {
+WatcherThread::WatcherThread() : Thread() {
   assert(watcher_thread() == NULL, "we can only allocate one WatcherThread");
   if (os::create_thread(this, os::watcher_thread)) {
     _watcher_thread = this;