package MyApp::CLI::test;

use v5.38;
use parent 'Mojolicious::Command';

use constant description => 'blah blah';

sub run { ... }

$_ = undef;

Use of uninitialized value $_ in substr at /root/perl5/perlbrew/perls/perl-5.38.0/lib/site_perl/5.38.0/Mojolicious/Commands.pm line 69.
substr outside of string at /root/perl5/perlbrew/perls/perl-5.38.0/lib/site_perl/5.38.0/Mojolicious/Commands.pm line 69.
Use of uninitialized value in hash element at /root/perl5/perlbrew/perls/perl-5.38.0/lib/site_perl/5.38.0/Mojolicious/Commands.pm line 69.
Can't call method "new" on an undefined value at /root/perl5/perlbrew/perls/perl-5.38.0/lib/site_perl/5.38.0/Mojolicious/Commands.pm line 69.

	for my $pkg (find_modules($ns), find_packages($ns)) {
		next unless _command($pkg);
		$all{substr $pkg, length "${ns}::"} //= $pkg->new->description
	}