*** old/src/share/vm/runtime/thread.cpp	Fri Sep 14 11:08:35 2012
--- new/src/share/vm/runtime/thread.cpp	Fri Sep 14 11:08:34 2012

*** 326,337 ****
--- 326,343 ----
  
  Thread::~Thread() {
    // Reclaim the objectmonitors from the omFreeList of the moribund thread.
    ObjectSynchronizer::omFlush (this) ;
  
+   // stack_base can be NULL if the thread is never started or exited before
+   // record_stack_base_and_size called. Although, we would like to ensure
+   // that all started threads do call record_stack_base_and_size(), there is
+   // not proper way to enforce that.
+   if (_stack_base != NULL) {
      address low_stack_addr = stack_base() - stack_size();
      MemTracker::release_thread_stack(low_stack_addr, stack_size(), this);
+   }
  
    // deallocate data structures
    delete resource_area();
    // since the handle marks are using the handle area, we have to deallocated the root
    // handle mark before deallocating the thread's handle area,