diff -r f04a848c6f00 -r cb5d2d4453d0 src/hotspot/share/gc/shared/generation.cpp
--- a/src/hotspot/share/gc/shared/generation.cpp	Thu Nov 30 08:35:33 2017 -0800
+++ b/src/hotspot/share/gc/shared/generation.cpp	Thu Nov 30 13:40:07 2017 +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");