This pulls in a bugfix in Package::Stash::XS 0.19.
use vars qw( $STORAGE_VAR );
use Sub::Name 0.04 qw(subname);
use Sub::Identify 0.04 qw(sub_fullname);
-use Package::Stash 0.18;
+use Package::Stash 0.22;
use B::Hooks::EndOfScope 0.07;
$STORAGE_VAR = '__NAMESPACE_CLEAN_STORAGE';