gistfile1.diff

diff -r 341e1e3821ff pypy/jit/metainterp/pyjitpl.py
--- a/pypy/jit/metainterp/pyjitpl.py    Thu Jun 07 14:24:48 2012 +0200
+++ b/pypy/jit/metainterp/pyjitpl.py    Wed Jun 13 14:41:15 2012 +0200
@@ -2406,6 +2406,7 @@
             self.virtualizable_boxes.append(virtualizable_box)
 
     def gen_store_back_in_virtualizable(self):
+        return
         vinfo = self.jitdriver_sd.virtualizable_info
         if vinfo is not None:
             # xxx only write back the fields really modified