--- old/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.cpp	2014-12-10 15:32:31.652096708 +0100
+++ new/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.cpp	2014-12-10 15:32:31.544100341 +0100
@@ -663,7 +663,7 @@
   }
 }
 
-void ParallelScavengeHeap::trace_heap(GCWhen::Type when, GCTracer* gc_tracer) {
+void ParallelScavengeHeap::trace_heap(GCWhen::Type when, const GCTracer* gc_tracer) {
   const PSHeapSummary& heap_summary = create_ps_heap_summary();
   gc_tracer->report_gc_heap_summary(when, heap_summary);