   0  getfield_gc_r %r0, FieldDescr<pypy.module.bz2.interp_bz2.WriteBZ2Filter.inst_stream> -> %r0
   5  getfield_gc_i %r0, FieldDescr<rpython.rlib.streamio.DiskFile.inst_fd> -> %i0
  10  int_return %i0
