== Running valgrind
This distro ships with a valgrind suppressions file that suppresses leaks that occur from inside the Perl core as well as leaks from other modules.
You can valgrind with a command like this:
./Build && \
valgrind --leak-check=full --num-callers=50 --suppressions=./valgrind.supp \
-- perl -Mblib -I ../MaxMind-DB-Reader-perl/lib/ t/MaxMind/DB/Reader.t
This assumes you have the MaxMind-DB-Reader-perl repo checked out in the parent directory.