   0  residual_call_r_r $<* fn _ll_0_alloc_with_del___>, R[], <CallDescr() EF=5> -> %r0
   6  -live- %r0
   6  setfield_gc_i %r0, $<* struct z_stream>, FieldDescr<pypy.module.zlib.interp_zlib.Decompress.inst_stream>
  11  ref_return %r0
