perl6 --stagestats -Ilib scheme.pl6 -e='(+ 1 2)'
Stage start      :   0.000
Stage parse      :   0.155
Stage syntaxcheck:   0.000
Stage ast        :   0.000
Stage optimize   :   0.004
Stage mast       :   0.025
Stage mbc        :   0.001
Stage moar       :   0.000
Scheme::PAST::File.new(line => 0, column => 0, file => "meh", val => $[Scheme::PAST::List.new(line => 0, column => 0, file => "meh", val => $[Scheme::PAST::Atom.new(line => 1, column => 1, file => "meh", val => "+"), Scheme::PAST::Atom.new(line => 1, column => 3, file => "meh", val => 1), Scheme::PAST::Atom.new(line => 1, column => 5, file => "meh", val => 2)])])
runtime runtime...
===SORRY!===
Type check failed in binding to parameter '$past'; expected Scheme::PAST but got Array ($[Scheme::PAST::List....)