Bug #71769 for Moose: parameterized metaclass trait creates a warning

In Moose-2.0205, a bug that caused a warning when passing options to an attribute trait has been fixed. Should the same be done with metaclass trait? This no longer creates a warning: $ perl -MCarp::Always -MMoose -e 'package R; use Moose::Role; package C; use Moose; has attr => (is => "ro", traits => [R => { foo => 1 }])' But this one does: $ perl -MCarp::Always -MMoose -e 'package R; use Moose::Role; package C; use Moose -traits => [R => { foo => 1 }]' Roles with parameters cannot be cached. Consider applying the parameters before calling create_anon_class, or using 'weaken => 0' instead at /Users/sherwind/perl5/lib/perl5/darwin-thread-multi-2level/Moose/Meta/Class.pm line 145 Moose::Meta::Class::_anon_cache_key('Moose::Meta::Class', 'roles', 'ARRAY(0x8e17a4)', 'weaken', '', 'superclasses', 'ARRAY(0xa25c40)') called at /Users/sherwind/perl5/lib/perl5/darwin-thread-multi-2level/Class/MOP/Package.pm line 109 Class::MOP::Package::create_anon('Moose::Meta::Class', 'superclasses', 'ARRAY(0xa25c40)', 'roles', 'ARRAY(0x8e17a4)', 'cache', 1) called at /Users/sherwind/perl5/lib/perl5/darwin-thread-multi-2level/Class/MOP/Class.pm line 473 Class::MOP::Class::create_anon_class('Moose::Meta::Class', 'superclasses', 'ARRAY(0xa25c40)', 'roles', 'ARRAY(0x8e17a4)', 'cache', 1) called at /Users/sherwind/perl5/lib/perl5/darwin-thread-multi-2level/Moose/Util/MetaRole.pm line 134 Moose::Util::MetaRole::_make_new_class('Moose::Meta::Class', 'ARRAY(0x8e17a4)') called at /Users/sherwind/perl5/lib/perl5/darwin-thread-multi-2level/Moose/Util/MetaRole.pm line 79 Moose::Util::MetaRole::_make_new_metaclass('Moose::Meta::Class=HASH(0xa1fbe0)', 'HASH(0xa25be0)', 'class') called at /Users/sherwind/perl5/lib/perl5/darwin-thread-multi-2level/Moose/Util/MetaRole.pm line 28 Moose::Util::MetaRole::apply_metaroles('class_metaroles', 'HASH(0xa25be0)', 'for', 'C') called at /Users/sherwind/perl5/lib/perl5/darwin-thread-multi-2level/Moose/Exporter.pm line 523 Moose::Exporter::_apply_meta_traits('C', 'ARRAY(0xa2594c)') called at /Users/sherwind/perl5/lib/perl5/darwin-thread-multi-2level/Moose/Exporter.pm line 434 Moose::Exporter::__ANON__('Moose') called at -e line 1 C::BEGIN() called at -e line 1 eval {...} called at -e line 1