If you go by link: https://github.com/Perl/perl5/tree/blead/lib
You will not find base.pm file
But If you clone this repo locally base.pm will be found at lib/base.pm
Why base.pm is not visible on the github?
UPD
kes@work ~/work/projects/github-forks/perl-hub/lib $ git tree | head -n 5
* 320f4ba290 (HEAD -> blead, upstream/blead) Sync DB_File with CPAN version 1.856
* 415da10787 Merge branch '18780-compound-token-split-by-macro' into blead
|\
| * 7169efc775 skip using gcc brace groups for STMT_START/END
|/
kes@work ~/work/projects/github-forks/perl-hub/lib $ git remote -v
upstream hub:Perl/perl5 (fetch)
upstream hub:Perl/perl5 (push)
where hub is configured to github.com via .ssh/config:
host hub
user git
hostname github.com
PreferredAuthentications publickey
port 22
