--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp	Wed Apr 16 12:58:03 2008 +0400
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp	Tue Apr 29 13:51:26 2008 +0400
@@ -169,8 +169,9 @@
   size_t large_typearray_limit() { return FastAllocateSizeLimit; }
 
   bool supports_inline_contig_alloc() const { return !UseNUMA; }
-  HeapWord** top_addr() const { return !UseNUMA ? young_gen()->top_addr() : NULL; }
-  HeapWord** end_addr() const { return !UseNUMA ? young_gen()->end_addr() : NULL; }
+
+  HeapWord** top_addr() const { return !UseNUMA ? young_gen()->top_addr() : (HeapWord**)-1; }
+  HeapWord** end_addr() const { return !UseNUMA ? young_gen()->end_addr() : (HeapWord**)-1; }
 
   void ensure_parsability(bool retire_tlabs);
   void accumulate_statistics_all_tlabs();