LaTeX export failure

[Thomas S. Dye]

Happy New Year!

Returning to a writing project after a few months absence, I'm no 
longer able to export the writing project subtree.  Here is what I 
find in *Messages*:

 Wrote /home/dk/Projects/historical-inference/r14c.org
 executing Shell code block...
 Wrote /tmp/babel-j0SOWm/ob-input-aS23DO
 Code block evaluation complete.
 match-string-no-properties: Args out of range: #<killed buffer>, 
 3, 11

The writing project exported without issue on November 7, 2019.

I'm typically using up-to-date org-plus-contrib from Elpa, so 
suspect my issue is due to a recent change in Org mode.

I don't know how to track down the problem.  Any ideas?

All the best,
Tom
--
Thomas S. Dye
https://tsdye.online/tsdye