  test -z "${ac_env_CXXFLAGS_set}" -a -n "${cxxflags+set}" && eval CXXFLAGS="\"$cxxflags $ARCH_FLAG\""
 Index: vm_core.h
 ===================================================================
---- vm_core.h	(revision 28931)
+--- vm_core.h	(revision 28972)
 +++ vm_core.h	(working copy)
 @@ -253,6 +253,8 @@
  

 void
 Init_ISeq(void)
 {
@@ -1503,10 +1757,13 @@
     rb_cISeq = rb_define_class_under(rb_cRubyVM, "InstructionSequence", rb_cObject);
     rb_define_alloc_func(rb_cISeq, iseq_alloc);
     rb_define_method(rb_cISeq, "inspect", iseq_inspect, 0);

       default:
 	return "unknown";
     }
@@ -4052,11 +4128,19 @@
     VALUE klass = 0;
 
     if (p->event == RUBY_EVENT_C_CALL ||
