use strict;

use XML::Handler::YAWriter;
use XML::Filter::SAX2toSAX1;
use XML::SAX::ParserFactory;

my $handler = XML::Handler::YAWriter->new();
my $filter = XML::Filter::SAX2toSAX1->new(Handler => $handler);
my $parser = XML::SAX::ParserFactory->parser(Handler => $filter);

$parser->parse_uri( "foo.xml" );

__END__
yields:
Not an ARRAY reference at
/usr/lib/perl5/site_perl/5.6.0/XML/Filter/SAX2toSAX1.pm line 47.