diff -r 7fd05714f579 -r fe1574da39fc src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp
--- a/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp	Tue May 26 16:43:42 2009 -0700
+++ b/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp	Sun Jun 07 00:27:41 2009 -0700
@@ -555,6 +555,7 @@
   _collector_policy(cp),
   _should_unload_classes(false),
   _concurrent_cycles_since_last_unload(0),
+  _roots_scanning_options(0),
   _sweep_estimate(CMS_SweepWeight, CMS_SweepPadding)
 {
   if (ExplicitGCInvokesConcurrentAndUnloadsClasses) {