This also appears to be affecting 16.04.2 as well.
# dpkg -l | grep "\ mhonarc\ \|\ perl-base\ "
ii mhonarc 2.6.19-2 all Mail to HTML converter
ii perl-base 5.22.1-9 amd64 minimal Perl system
# mhonarc --help
Can't use 'defined(%hash)' (Maybe you should just omit the defined()?) at /usr/local/share/perl/5.22.1/mhamain.pl line 1565.
Compilation failed in require at /usr/bin/mhonarc line 39.
This also appears to be affecting 16.04.2 as well.
# dpkg -l | grep "\ mhonarc\ \|\ perl-base\ "
ii mhonarc 2.6.19-2 all Mail to HTML converter
ii perl-base 5.22.1-9 amd64 minimal Perl system
# mhonarc --help share/perl/ 5.22.1/ mhamain. pl line 1565.
Can't use 'defined(%hash)' (Maybe you should just omit the defined()?) at /usr/local/
Compilation failed in require at /usr/bin/mhonarc line 39.