 -    VALUE root_fiber;
 -    rb_jmpbuf_t root_jmpbuf;
 -
--    /* misc */
+     /* misc */
 -    int method_missing_reason;
 -    int abort_on_exception;
- } rb_thread_t;
- 
- /* iseq.c */
-@@ -483,6 +492,7 @@
+ #ifdef USE_SIGALTSTACK
+     void *altstack;
+ #endif
+@@ -490,6 +500,7 @@
  VALUE rb_iseq_new_with_opt(NODE*, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, const rb_compile_option_t*);
  VALUE rb_iseq_compile(VALUE src, VALUE file, VALUE line);
  VALUE rb_iseq_disasm(VALUE self);

 		EXEC_EVENT_HOOK(th, RUBY_EVENT_END, th->cfp->self, 0, 0);
Index: vm_insnhelper.c
===================================================================
--- vm_insnhelper.c	(revision 27742)
+++ vm_insnhelper.c	(working copy)
@@ -26,6 +26,7 @@
 	      const VALUE *pc, VALUE *sp, VALUE *lfp,

      *        *c,                                 # rest
      *        d1, d2, ..., dO,                    # post
      *        &e)                                 # block
@@ -253,6 +253,8 @@
 
     /* used at compile time */
     struct iseq_compile_data *compile_data;
