$ texdoc --debug cjhebrew
texdoc debug-version: /usr/share/texmf-dist/scripts/texdoc/texdoclib.tlu version 3.0
texdoc debug-config: Setting 'debug_list=all' from command line option "--debug".
texdoc debug-config: Setting 'viewer_pdf=mupdf -r 60' from environment variable "PDFVIEWER".
texdoc debug-config: Setting 'viewer_html=w3m' from environment variable "BROWSER".
texdoc debug-config: Setting 'viewer_md=less' from environment variable "PAGER".
texdoc debug-config: Setting 'viewer_txt=less' from environment variable "PAGER".
texdoc debug-config: Ignoring 'viewer_pdf=(mupdf -r 70 %s) &' in file "/home/bart/texmf/texdoc/texdoc.cnf" on line 4.
texdoc debug-config: Setting 'suffix_list=doc, -doc, _doc, .doc, /doc, manual, /manual, -manual, userguide, /user_guide, -guide, -user, -man, notes, -info, ref' in file "/home/bart/texmf/texdoc/texdoc.cnf" on line 48.
texdoc debug-config: Ignoring 'suffix_list=doc, -doc, _doc, .doc, /doc, manual, /manual, -manual, userguide, /user_guide, -guide, -user, -man, notes, -info, ref' in file "/usr/share/texmf-dist/texdoc/texdoc.cnf" on line 95.
texdoc debug-config: Setting 'lastfile_switch=true' in file "/usr/share/texmf-dist/texdoc/texdoc.cnf" on line 509.
texdoc debug-config: Setting 'lang=en' from operating system locale.
texdoc debug-config: Setting 'max_lines=20' from built-in defaults.
texdoc debug-config: Setting 'machine_switch=false' from built-in defaults.
texdoc debug-config: Setting 'basename_list=readme, 00readme' from built-in defaults.
texdoc debug-config: Setting 'mode=view' from built-in defaults.
texdoc debug-config: Setting 'ext_list=pdf, htm, html, txt, ps, dvi, ' from built-in defaults.
texdoc debug-config: Setting 'verbosity_level=2' from built-in defaults.
texdoc debug-config: Setting 'interact_switch=true' from built-in defaults.
texdoc debug-config: Setting 'badbasename_list=readme, 00readme' from built-in defaults.
texdoc debug-config: Setting 'fuzzy_level=5' from built-in defaults.
texdoc debug-config: Setting 'badext_list=txt, ' from built-in defaults.
texdoc debug-config: Setting 'rm_dir=rmdir' from built-in defaults.
texdoc debug-config: Setting 'rm_file=rm -f' from built-in defaults.
texdoc debug-config: Setting 'zipext_list=' from built-in defaults.
texdoc debug-files: Configuration files are:
texdoc debug-files: active	/home/bart/texmf/texdoc/texdoc.cnf
texdoc debug-files: active	/usr/share/texmf-dist/texdoc/texdoc.cnf
texdoc debug-texdocs: texdocs[8] = /home/bart/.texlive/texmf-config/doc (index_mandatory=false, recursion_allowed=true)
texdoc debug-texdocs: texdocs[7] = /home/bart/.texlive/texmf-var/doc (index_mandatory=false, recursion_allowed=true)
texdoc debug-texdocs: texdocs[6] = /home/bart/texmf/doc (index_mandatory=false, recursion_allowed=true)
texdoc debug-texdocs: texdocs[6] using filesystem search
texdoc debug-texdocs: texdocs[5] = /etc/texmf/doc (index_mandatory=true, recursion_allowed=true)
texdoc debug-texdocs: texdocs[4] = /var/lib/texmf/doc (index_mandatory=true, recursion_allowed=true)
texdoc debug-texdocs: texdocs[3] = /usr/local/share/texmf/doc (index_mandatory=true, recursion_allowed=true)
texdoc debug-texdocs: texdocs[3] using index: /usr/local/share/texmf (shift=doc/)
texdoc debug-texdocs: texdocs[2] = /usr/share/texmf/doc (index_mandatory=false, recursion_allowed=true)
texdoc debug-texdocs: texdocs[1] = /usr/share/texmf-dist/doc (index_mandatory=true, recursion_allowed=true)
texdoc debug-tlpdb: Using shipped tlpdb data.
[string "/usr/share/texmf-dist/scripts/texdoc/search.t..."]:569: assertion failed!