Description of problem:

Post update, I'm seeing:

Jun  3 16:19:50 localhost spamd[2530]: plugin: failed to parse plugin (from @INC): exists argument is not a HASH or ARRAY element or a subroutine at /usr/share/perl5/vendor_perl/Mail/SpamAssassin/Plugin/URILocalBL.pm line 376.
Jun  3 16:19:51 localhost spamd[2530]: plugin: failed to parse plugin (from @INC): Attempt to reload Mail/SpamAssassin/Plugin/URILocalBL.pm aborted.
Jun  3 16:20:22 localhost spamd[2540]: plugin: failed to parse plugin (from @INC): exists argument is not a HASH or ARRAY element or a subroutine at /usr/share/perl5/vendor_perl/Mail/SpamAssassin/Plugin/URILocalBL.pm line 405.
Jun  3 16:20:22 localhost spamd[2540]: plugin: failed to parse plugin (from @INC): Attempt to reload Mail/SpamAssassin/Plugin/URILocalBL.pm aborted.

which is a result in recent versions of Perl being fussier about references to hashes.

See https://bz.apache.org/SpamAssassin/show_bug.cgi?id=7208


Version-Release number of selected component (if applicable):

spamassassin-3.4.1-17.fc27.x86_64

How reproducible:

Below


Steps to Reproduce:
1. Install spamassassin.
2. echo "loadplugin Mail::SpamAssassin::Plugin::URILocalBL" >> /etc/mail/spamassassin/v341.pre
3. Start spamassassin with systemctl and look at /var/log/maillog

Actual results:

Jun  3 16:19:50 localhost spamd[2530]: plugin: failed to parse plugin (from @INC): exists argument is not a HASH or ARRAY element or a subroutine at /usr/share/perl5/vendor_perl/Mail/SpamAssassin/Plugin/URILocalBL.pm line 376.
Jun  3 16:19:51 localhost spamd[2530]: plugin: failed to parse plugin (from @INC): Attempt to reload Mail/SpamAssassin/Plugin/URILocalBL.pm aborted.
Jun  3 16:20:22 localhost spamd[2540]: plugin: failed to parse plugin (from @INC): exists argument is not a HASH or ARRAY element or a subroutine at /usr/share/perl5/vendor_perl/Mail/SpamAssassin/Plugin/URILocalBL.pm line 405.
Jun  3 16:20:22 localhost spamd[2540]: plugin: failed to parse plugin (from @INC): Attempt to reload Mail/SpamAssassin/Plugin/URILocalBL.pm aborted.

Expected results:

None of these errors.

Additional info:

Grab commit r1684653 from SVN and add it as a patch to the .spec file.