local::lib will emit a warning if there is no contents in the PERL5LIB
env variable.
The trivial fix is to update line 456 of local/lib.pm to return the env
variable string or an empty string:
my @new_perl5lib = split /\Q$Config{path_sep}/, $ENV{PERL5LIB} || '';
There is no impacted functionality but that change does squelch the
warning that would show up when I open my terminal.
Cheers!
Tyler