  } rb_control_frame_t;
  
  typedef struct rb_block_struct {
-@@ -386,6 +391,18 @@
+@@ -390,6 +395,18 @@
      /* passing state */
      int state;
  

     (return value)
Index: vm_core.h
===================================================================
--- vm_core.h	(revision 27742)
+++ vm_core.h	(working copy)
@@ -34,7 +34,7 @@
 #ifndef ENABLE_VM_OBJSPACE

  *
  *  Establishes _proc_ as the handler for tracing, or disables
  *  tracing if the parameter is +nil+. _proc_ takes up
@@ -3898,6 +3962,8 @@
  *  <code>line</code> (execute code on a new line), <code>raise</code>
  *  (raise an exception), and <code>return</code> (return from a Ruby
  *  method). Tracing is disabled within the context of _proc_.
