Every time asql is run it shows the following message (Ubuntu 18.04 x86_64, Perl: v5.26.1):

asql --load access.log
Name "Regexp::IPv6::IPv6_re" used only once: possible typo at /usr/bin/asql line 1534.

It's shown irrespective any IPv6 IPs being present or not in the access log file.

Trying to load an access log from a shared hosting results in an empty database and yet no warnings or errors.

The log format is fairly common, pretty much the default, somewhat modified combined format (have a server name and IP appended at the end, also have '-' for ident and userid). (sample attached, 7 records are expected).

wc -l access.log 
7 access.log

asql --load access.log

asql v1.7 - type 'help' for help.
asql> select count(*) from logs;
0

access.log

Running make test does not execute the commands specified in the Makefile. Instead, it shows that the 'test' is up to date (Ubuntu 18.04 x86_64).

make test
make: 'test' is up to date.

Also, a check target appears to be missing, not that is must be there, just it'd be nice to have it for consistency.