--- old/src/hotspot/share/gc/shared/generation.cpp	2018-02-21 22:19:55.211023531 +0100
+++ new/src/hotspot/share/gc/shared/generation.cpp	2018-02-21 22:19:55.003016411 +0100
@@ -63,9 +63,9 @@
 size_t Generation::initial_size() {
   GenCollectedHeap* gch = GenCollectedHeap::heap();
   if (gch->is_young_gen(this)) {
-    return gch->gen_policy()->young_gen_spec()->init_size();
+    return gch->young_gen_spec()->init_size();
   }
-  return gch->gen_policy()->old_gen_spec()->init_size();
+  return gch->old_gen_spec()->init_size();
 }
 
 size_t Generation::max_capacity() const {