--- a/src/hotspot/share/gc/g1/heapRegionTracer.cpp	Fri Mar 02 10:09:05 2018 +0100
+++ b/src/hotspot/share/gc/g1/heapRegionTracer.cpp	Fri Mar 02 10:09:08 2018 +0100
@@ -30,8 +30,7 @@
                                                G1HeapRegionTraceType::Type from,
                                                G1HeapRegionTraceType::Type to,
                                                uintptr_t start,
-                                               size_t used,
-                                               uint allocationContext) {
+                                               size_t used) {
   EventG1HeapRegionTypeChange e;
   if (e.should_commit()) {
     e.set_index(index);
@@ -39,7 +38,6 @@
     e.set_to(to);
     e.set_start(start);
     e.set_used(used);
-    e.set_allocationContext(allocationContext);
     e.commit();
   }
 }