--- a/hotspot/src/share/vm/classfile/systemDictionary.cpp	Wed Feb 03 11:40:30 2016 -0500
+++ b/hotspot/src/share/vm/classfile/systemDictionary.cpp	Wed Feb 03 18:16:54 2016 +0100
@@ -2384,6 +2384,7 @@
       oop appendix = appendix_box->obj_at(0);
       if (TraceMethodHandles) {
     #ifndef PRODUCT
+        ttyLocker ttyl;
         tty->print("Linked method=" INTPTR_FORMAT ": ", p2i(m));
         m->print();
         if (appendix != NULL) { tty->print("appendix = "); appendix->print(); }