Traceback (most recent call last):
  File "/usr/local/bin/pandoc-latex-unlisted", line 11, in <module>
    sys.exit(main())
  File "/usr/local/lib/python2.7/site-packages/pandoc_latex_unlisted.py", line 43, in main
    return run_filter(header, prepare = prepare, doc = doc, finalize = finalize)
  File "/usr/local/lib/python2.7/site-packages/panflute/io.py", line 265, in run_filter
    return run_filters([action], *args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/panflute/io.py", line 249, in run_filters
    finalize(doc)
  File "/usr/local/lib/python2.7/site-packages/pandoc_latex_unlisted.py", line 40, in finalize
    doc.metadata['header-includes'].append(MetaInlines(RawInline('\\let\\oldaddcontentsline\\addcontentsline', 'tex')))
AttributeError: 'MetaBlocks' object has no attribute 'append'
Error running filter pandoc-latex-unlisted:

! Undefined control sequence.
\addcontentsline #1#2#3->\oldaddcontentsline
                                             {#1}{#2}{#3}
l.1240 \section{段落についての議論}  % in Japanese

pandoc -N pandoc-latex-unlisted-sample.txt --pdf-engine=xelatex --filter pandoc-latex-unlisted -o out.pdf

/usr/local/lib/python2.7/dist-packages/panflute/autofilter.py:163: Warning: Click detected the use of the unicode_literals __future__ import.  This is heavily discouraged because it can introduce subtle bugs in your code.  You should instead use explicit u"" literals for your unicode strings.  For more information see https://click.palletsprojects.com/python3/
  "that is appended to the search list.")