--- old/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp	2020-06-01 12:25:21.725030095 +0200
+++ new/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp	2020-06-01 12:25:21.409030507 +0200
@@ -1660,7 +1660,7 @@
   ShenandoahConcurrentRootsEvacUpdateTask(ShenandoahPhaseTimings::Phase phase) :
     AbstractGangTask("Shenandoah Evacuate/Update Concurrent Strong Roots Task"),
     _vm_roots(phase),
-    _cld_roots(phase) {}
+    _cld_roots(phase, ShenandoahHeap::heap()->workers()->active_workers()) {}
 
   void work(uint worker_id) {
     ShenandoahConcurrentWorkerSession worker_session(worker_id);
@@ -1781,7 +1781,7 @@
     _string_table_roots(OopStorageSet::string_table_weak(), phase, ShenandoahPhaseTimings::StringTableRoots),
     _resolved_method_table_roots(OopStorageSet::resolved_method_table_weak(), phase, ShenandoahPhaseTimings::ResolvedMethodTableRoots),
     _vm_roots(OopStorageSet::vm_weak(), phase, ShenandoahPhaseTimings::VMWeakRoots),
-    _cld_roots(phase),
+    _cld_roots(phase, ShenandoahHeap::heap()->workers()->active_workers()),
     _nmethod_itr(ShenandoahCodeRoots::table()),
     _concurrent_class_unloading(ShenandoahConcurrentRoots::should_do_concurrent_class_unloading()) {
     StringTable::reset_dead_counter();