--- old/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp	2020-04-27 10:20:17.823870476 +0200
+++ new/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp	2020-04-27 10:20:17.631867350 +0200
@@ -1314,6 +1314,10 @@
   }
 }
 
+void ShenandoahHeap::run_task(AbstractGangTask* task) {
+  workers()->run_task(task, workers()->active_workers());
+}
+
 // Keep alive an object that was loaded with AS_NO_KEEPALIVE.
 void ShenandoahHeap::keep_alive(oop obj) {
   if (is_concurrent_mark_in_progress()) {