--- old/src/share/vm/memory/genCollectedHeap.hpp	2014-10-17 15:34:53.000000000 +0200
+++ new/src/share/vm/memory/genCollectedHeap.hpp	2014-10-17 15:34:52.000000000 +0200
@@ -67,8 +67,6 @@
   Generation* _young_gen;
   Generation* _old_gen;
 
-  GenerationSpec** _gen_specs;
-
   // The generational collector policy.
   GenCollectorPolicy* _gen_policy;
 
@@ -142,8 +140,8 @@
     return CollectedHeap::GenCollectedHeap;
   }
 
-  Generation* young_gen() { return _young_gen; }
-  Generation* old_gen()   { return _old_gen; }
+  Generation* young_gen() const { return _young_gen; }
+  Generation* old_gen()   const { return _old_gen; }
 
   // The generational collector policy.
   GenCollectorPolicy* gen_policy() const { return _gen_policy; }