   0  getarrayitem_gc_r %r1, $0, <rpython.jit.backend.llsupport.descr.ArrayDescr object at 0x000002aac88c19f0> -> %r0
   6  inline_call_ir_r <JitCode 'interp_w__W_TextIOBase'>, I[$False], R[%r0] -> %r0
  14  -live-
  14  inline_call_r_r <JitCode 'unsupported'>, R[$<* struct rpy_string>] -> %r0
  20  -live- %r0
  20  assert_not_none %r0
  22  -live- %r0
  22  guard_class %r0 -> %i0
  25  -live- %r0
  25  raise %r0
