--- old/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp 2019-02-15 19:02:24.891271703 +0300 +++ new/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp 2019-02-15 19:02:24.799274921 +0300 @@ -75,7 +75,6 @@ class G1OldTracer; class EvacuationFailedInfo; class nmethod; -class Ticks; typedef OverflowTaskQueue RefToScanQueue; typedef GenericTaskQueueSet RefToScanQueueSet;