Crash using Doxygen 1.8.13

My documentation builds correctly with 1.8.12 but when I try 1.8.13 I
get a segmentation fault.

The project is located here:
https://github.com/vinniefalco/Beast

To reproduce the steps, issue these commands from the root of the
local repository:

cd doc
./makeqbk.sh

Result: When Doxygen 1.8.13 is invoked, it will do some processing and
then terminate with a segmentation fault.

Please advise

------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot