--- old/src/hotspot/share/gc/shared/generation.cpp	2017-11-28 11:57:13.245665663 +0100
+++ new/src/hotspot/share/gc/shared/generation.cpp	2017-11-28 11:57:12.986668667 +0100
@@ -44,7 +44,8 @@
 #include "utilities/events.hpp"
 
 Generation::Generation(ReservedSpace rs, size_t initial_size) :
-  _ref_processor(NULL) {
+  _ref_processor(NULL),
+  _gc_manager(NULL) {
   if (!_virtual_space.initialize(rs, initial_size)) {
     vm_exit_during_initialization("Could not reserve enough space for "
                     "object heap");