--- old/src/share/vm/gc_implementation/shenandoah/shenandoahPhaseTimings.cpp	2019-11-11 16:10:03.238342540 +0100
+++ new/src/share/vm/gc_implementation/shenandoah/shenandoahPhaseTimings.cpp	2019-11-11 16:10:03.151342544 +0100
@@ -84,6 +84,10 @@
   guarantee(phase == init_evac ||
             phase == scan_roots ||
             phase == update_roots ||
+            phase == init_traversal_gc_work ||
+            phase == init_weak_traversal_gc_work ||
+            phase == final_traversal_gc_work ||
+            phase == final_traversal_update_roots ||
             phase == final_update_refs_roots ||
             phase == full_gc_roots ||
             phase == degen_gc_update_roots ||