# command: 
# perl -e 'print $], "\n"; ' ; dpkg -l | egrep autovivifi


# Debian buster: 
5.028001
ii  libautovivification-perl          0.18-1+b1                    amd64        pragma for lexically disabling autovivification


# Debian stretch: 
5.024001
ii  libautovivification-perl          0.16-1+b2                         amd64        pragma for lexically disabling autovivification