Traceback (most recent call last):
  File "bin/osh", line 469, in <module>
    main(sys.argv)
  File "bin/osh", line 452, in main
    sys.exit(OilMain(argv))
  File "bin/osh", line 435, in OilMain
    status = OshMain(main_argv, login_shell)
  File "bin/osh", line 350, in OshMain
    osh2oil.PrintAsOil(arena, node, opts.debug_spans)
  File "/home/andy/git/oil/bin/../tools/osh2oil.py", line 69, in PrintAsOil
    fixer.DoCommand(node, None, at_top_level=True)  # no local symbols yet
  File "/home/andy/git/oil/bin/../tools/osh2oil.py", line 473, in DoCommand
    self.DoCommand(child, local_symbols)
  File "/home/andy/git/oil/bin/../tools/osh2oil.py", line 536, in DoCommand
    self.DoRedirect(r, local_symbols)
  File "/home/andy/git/oil/bin/../tools/osh2oil.py", line 270, in DoRedirect
    raise NotImplementedError(node.__class__.__name__)
NotImplementedError: HereDoc