Prototype mismatch: sub main::foo ($$$) vs none at /home/stevieb/perl5/perlbrew/perls/perl-5.26.1/lib/site_perl/5.26.1/Mock/Sub/Child.pm line 122.
Prototype mismatch: sub main::foo: none vs ($$$) at /home/stevieb/perl5/perlbrew/perls/perl-5.26.1/lib/site_perl/5.26.1/Mock/Sub/Child.pm line 140.