--- old/src/share/vm/runtime/thread.cpp	2013-09-25 21:48:02.571646240 +0200
+++ new/src/share/vm/runtime/thread.cpp	2013-09-25 21:48:02.507646242 +0200
@@ -1452,7 +1452,6 @@
   _interp_only_mode    = 0;
   _special_runtime_exit_condition = _no_async_condition;
   _pending_async_exception = NULL;
-  _is_compiling = false;
   _thread_stat = NULL;
   _thread_stat = new ThreadStatistics();
   _blocked_on_compilation = false;
@@ -3237,6 +3236,7 @@
   _counters = counters;
   _buffer_blob = NULL;
   _scanned_nmethod = NULL;
+  _compiler = NULL;
 
 #ifndef PRODUCT
   _ideal_graph_printer = NULL;