--- old/src/hotspot/share/gc/g1/g1GCPhaseTimes.cpp	2019-02-20 10:50:07.185192614 +0100
+++ new/src/hotspot/share/gc/g1/g1GCPhaseTimes.cpp	2019-02-20 10:50:06.916184397 +0100
@@ -380,7 +380,7 @@
 
   trace_phase(_gc_par_phases[GCWorkerStart], false);
   debug_phase(_gc_par_phases[ExtRootScan]);
-  for (int i = ThreadRoots; i <= SATBFiltering; i++) {
+  for (int i = ExtRootScanSubPhasesStart; i <= ExtRootScanSubPhasesEnd; i++) {
     trace_phase(_gc_par_phases[i]);
   }
   if (G1HotCardCache::default_use_cache()) {