--- a/src/hotspot/share/gc/shared/workerDataArray.inline.hpp	Thu Jun 27 03:33:44 2019 +0200
+++ b/src/hotspot/share/gc/shared/workerDataArray.inline.hpp	Thu Jun 27 11:48:32 2019 +0200
@@ -101,7 +101,7 @@
 template <typename T>
 void WorkerDataArray<T>::add(uint worker_i, T value) {
   assert(worker_i < _length, "Worker %d is greater than max: %d", worker_i, _length);
-  assert(_data[worker_i] != uninitialized(), "No data to add to for worker %d", worker_i);
+  assert(_data[worker_i] != uninitialized(), "No data to add to %s for worker %d", _title, worker_i);
   _data[worker_i] += value;
 }