Created attachment 778339 [details]
Patch to silence warnings

Use of Perl6::Junction generates lots of warnings, as can be seen in the build log (http://kojipkgs.fedoraproject.org//packages/perl-Perl6-Junction/1.50000/3.fc20/data/logs/noarch/build.log):

$ make test
PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
Smartmatch is experimental at (eval 7) line 7.
Smartmatch is experimental at (eval 7) line 14.
Smartmatch is experimental at (eval 9) line 7.
Smartmatch is experimental at (eval 9) line 14.
Smartmatch is experimental at (eval 11) line 7.
Smartmatch is experimental at (eval 11) line 14.
Smartmatch is experimental at (eval 13) line 10.
Smartmatch is experimental at (eval 13) line 20.
t/01_use.t ....... ok
Smartmatch is experimental at (eval 6) line 7.
Smartmatch is experimental at (eval 6) line 14.
Smartmatch is experimental at (eval 8) line 7.
Smartmatch is experimental at (eval 8) line 14.
Smartmatch is experimental at (eval 10) line 7.
Smartmatch is experimental at (eval 10) line 14.
Smartmatch is experimental at (eval 12) line 10.
Smartmatch is experimental at (eval 12) line 20.
t/all.t .......... ok
Smartmatch is experimental at (eval 6) line 7.
Smartmatch is experimental at (eval 6) line 14.
Smartmatch is experimental at (eval 8) line 7.
Smartmatch is experimental at (eval 8) line 14.
Smartmatch is experimental at (eval 10) line 7.
Smartmatch is experimental at (eval 10) line 14.
Smartmatch is experimental at (eval 12) line 10.
Smartmatch is experimental at (eval 12) line 20.
t/any.t .......... ok
Smartmatch is experimental at (eval 6) line 7.
Smartmatch is experimental at (eval 6) line 14.
Smartmatch is experimental at (eval 8) line 7.
Smartmatch is experimental at (eval 8) line 14.
Smartmatch is experimental at (eval 10) line 7.
Smartmatch is experimental at (eval 10) line 14.
Smartmatch is experimental at (eval 12) line 10.
Smartmatch is experimental at (eval 12) line 20.
t/import_tags.t .. ok
Smartmatch is experimental at (eval 6) line 7.
Smartmatch is experimental at (eval 6) line 14.
Smartmatch is experimental at (eval 8) line 7.
Smartmatch is experimental at (eval 8) line 14.
Smartmatch is experimental at (eval 10) line 7.
Smartmatch is experimental at (eval 10) line 14.
Smartmatch is experimental at (eval 12) line 10.
Smartmatch is experimental at (eval 12) line 20.
t/join.t ......... ok
Smartmatch is experimental at (eval 6) line 7.
Smartmatch is experimental at (eval 6) line 14.
Smartmatch is experimental at (eval 8) line 7.
Smartmatch is experimental at (eval 8) line 14.
Smartmatch is experimental at (eval 10) line 7.
Smartmatch is experimental at (eval 10) line 14.
Smartmatch is experimental at (eval 12) line 10.
Smartmatch is experimental at (eval 12) line 20.
t/no_import.t .... ok
Smartmatch is experimental at (eval 6) line 7.
Smartmatch is experimental at (eval 6) line 14.
Smartmatch is experimental at (eval 8) line 7.
Smartmatch is experimental at (eval 8) line 14.
Smartmatch is experimental at (eval 10) line 7.
Smartmatch is experimental at (eval 10) line 14.
Smartmatch is experimental at (eval 12) line 10.
Smartmatch is experimental at (eval 12) line 20.
t/none.t ......... ok
Smartmatch is experimental at (eval 6) line 7.
Smartmatch is experimental at (eval 6) line 14.
Smartmatch is experimental at (eval 8) line 7.
Smartmatch is experimental at (eval 8) line 14.
Smartmatch is experimental at (eval 10) line 7.
Smartmatch is experimental at (eval 10) line 14.
Smartmatch is experimental at (eval 12) line 10.
Smartmatch is experimental at (eval 12) line 20.
t/one.t .......... ok
All tests successful.
Files=8, Tests=374,  0 wallclock secs ( 0.08 usr  0.01 sys +  0.29 cusr  0.04 csys =  0.42 CPU)
Result: PASS

This is raised upstream at: https://rt.cpan.org/Public/Bug/Display.html?id=85699

I've attached a patch that fixes this for me.