   0  inline_call_ir_r <JitCode 'interp_w__W_IOBase'>, I[$False], R[%r0] -> %r0
   8  -live- %r0
   8  getfield_gc_i %r0, FieldDescr<pypy.module._io.interp_iobase.W_IOBase.inst__W_IOBase__IOBase_closed> -> %i0
  13  -live- %i0
  13  goto_if_not %i0, L1
  17  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x7fff4a07fb90> -> %r0
  21  setfield_gc_r %r0, $<* struct rpy_string>, FieldDescr<pypy.interpreter.error.OpErrFmtNoArgs.inst__value>
  26  setfield_gc_r %r0, $<* struct pypy.interpreter.baseobjspace.W_Root>, FieldDescr<pypy.interpreter.error.OperationError.inst_w_type>
  31  assert_not_none %r0
  33  -live- %r0
  33  guard_class %r0 -> %i0
  36  -live- %r0
  36  raise %r0
  38  ---
  38  L1:
  38  ref_return $<* struct pypy.interpreter.baseobjspace.W_Root>
