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! Package pgfkeys Error: I do not know the key '/tikz/marking' and I am going t
o ignore it. Perhaps you misspelled it.

See the pgfkeys package documentation for explanation.
Type  H <return>  for immediate help
...
l.6 I think the culprit is a tikzcd arrow in cell 1-1.
\errmessage ...currentrow -\tikzcd@currentcolumn }

l.7 	\end{tikzcd}

This error message was generated by an \errmessage
command, so I can't give any explicit help.
Pretend that you're Hercule Poirot: Examine all clues,
and deduce the truth by order and method.

[1

{/var/lib/texmf/fonts/map/pdftex/updmap/pdftex.map}] (./barred_arrow.aux)

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supp-pdf.mkii
epstopdf-base.sty    2016/05/15 v2.6 Base part for package epstopdf
infwarerr.sty    2016/05/16 v1.4 Providing info/warning/error messages (HO)
  grfext.sty    2016/05/16 v1.2 Manage graphics extensions (HO)
kvdefinekeys.sty    2016/05/16 v1.4 Define keys (HO)
 ltxcmds.sty    2016/05/16 v1.23 LaTeX kernel commands for general use (HO)
kvoptions.sty    2016/05/16 v3.12 Key value format for package options (HO)
kvsetkeys.sty    2016/05/16 v1.17 Key value parser (HO)
etexcmds.sty    2016/05/16 v1.6 Avoid name clashes with e-TeX commands (HO)
ifluatex.sty    2016/05/16 v1.4 Provides the ifluatex switch (HO)
pdftexcmds.sty    2018/01/21 v0.26 Utility functions of pdfTeX for LuaTeX (HO)
   ifpdf.sty    2017/03/15 v3.2 Provides the ifpdf switch
epstopdf-sys.cfg    2010/07/13 v1.3 Configuration of (r)epstopdf for TeX Live
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Here is how much of TeX's memory you used:
 12241 strings out of 494894
 261792 string characters out of 6179473
 283018 words of memory out of 5000000
 15361 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 14 hyphenation exceptions out of 8191
 61i,14n,84p,466b,869s stack positions out of 5000i,500n,10000p,200000b,80000s
</usr/share/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/cmmi10.pfb></us
r/share/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/cmr10.pfb></usr/share
/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/cmsy7.pfb>
Output written on barred_arrow.pdf (1 page, 23116 bytes).
PDF statistics:
 23 PDF objects out of 1000 (max. 8388607)
 16 compressed objects within 1 object stream
 0 named destinations out of 1000 (max. 500000)
 13 words of extra memory for PDF output out of 10000 (max. 10000000)