> perl6 --ll-exception -Ilib scheme.pl6 -e='(+ 1 2)'
Scheme::PAST::File.new(line => 0, column => 0, file => "meh", val => $[Scheme::PAST::List.new(line => 0, column => 0, file => "meh", val => $[Scheme::PAST::Atom.new(line => 1, column => 1, file => "meh", val => "+"), Scheme::PAST::Atom.new(line => 1, column => 3, file => "meh", val => 1), Scheme::PAST::Atom.new(line => 1, column => 5, file => "meh", val => 2)])])
runtime runtime...
Type check failed in binding to parameter '$past'; expected Scheme::PAST but got Array ($[Scheme::PAST::List....)
   at SETTING::src/core/Exception.pm6:62  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/perl6/runtime/CORE.setting.moarvm:throw)
 from SETTING::src/core/Exception.pm6:2752  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/perl6/runtime/CORE.setting.moarvm:)
 from gen/moar/BOOTSTRAP.nqp:326  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/nqp/lib/Perl6/BOOTSTRAP.moarvm:)
 from gen/moar/BOOTSTRAP.nqp:3694  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/nqp/lib/Perl6/BOOTSTRAP.moarvm:)
 from /home/barthm/repos/others/scheme6/lib/Scheme/Compiler.pm6 (Scheme::Compiler):6  (/home/barthm/repos/others/scheme6/lib/.precomp/344AD54DF7E5D38758C94A42435BCD791C20A36F/CE/CED3887E9B0AC4825022BF5F6F4AC31B082F28E8:compile)
 from /home/barthm/repos/others/scheme6/lib/Scheme/Compiler.pm6 (Scheme::Compiler):7  (/home/barthm/repos/others/scheme6/lib/.precomp/344AD54DF7E5D38758C94A42435BCD791C20A36F/CE/CED3887E9B0AC4825022BF5F6F4AC31B082F28E8:compile)
 from /home/barthm/repos/others/scheme6/lib/Scheme.pm6 (Scheme):25  (/home/barthm/repos/others/scheme6/lib/.precomp/344AD54DF7E5D38758C94A42435BCD791C20A36F/99/990897A59F17D4DEAC662966307B456E376C6C6D:compile)
 from scheme.pl6:37  (<ephemeral file>:run-code)
 from scheme.pl6:27  (<ephemeral file>:MAIN)
 from scheme.pl6:7  (<ephemeral file>:MAIN)
 from SETTING::src/core/Main.pm6:280  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/perl6/runtime/CORE.setting.moarvm:)
 from SETTING::src/core/Main.pm6:276  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/perl6/runtime/CORE.setting.moarvm:)
 from SETTING::src/core/Main.pm6:275  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/perl6/runtime/CORE.setting.moarvm:RUN-MAIN)
 from scheme.pl6:5  (<ephemeral file>:<unit>)
 from scheme.pl6:1  (<ephemeral file>:<unit-outer>)
 from gen/moar/stage2/NQPHLL.nqp:1684  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/nqp/lib/NQPHLL.moarvm:eval)
 from gen/moar/stage2/NQPHLL.nqp:1888  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/nqp/lib/NQPHLL.moarvm:evalfiles)
 from gen/moar/stage2/NQPHLL.nqp:1848  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/nqp/lib/NQPHLL.moarvm:command_eval)
 from src/Perl6/Compiler.nqp:38  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/nqp/lib/Perl6/Compiler.moarvm:command_eval)
 from gen/moar/stage2/NQPHLL.nqp:1773  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/nqp/lib/NQPHLL.moarvm:command_line)
 from gen/moar/main.nqp:48  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/perl6/runtime/perl6.moarvm:MAIN)
 from gen/moar/main.nqp:1  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/perl6/runtime/perl6.moarvm:<mainline>)
 from <unknown>:1  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/perl6/runtime/perl6.moarvm:<main>)
 from <unknown>:1  (/home/barthm/.rakudobrew/moar-2019.03.1/install/share/perl6/runtime/perl6.moarvm:<entry>)