perl6 --ll-exception Asistencia.pm6
This type cannot unbox to a native integer: P6opaque, Failure
   at SETTING::src/core/Any-iterable-methods.pm:1891  (/home/clasclin/bin/rakudo-star-2016.11/install/share/perl6/runtime/CORE.setting.moarvm:head)
 from SETTING::src/core/Any-iterable-methods.pm:1883  (/home/clasclin/bin/rakudo-star-2016.11/install/share/perl6/runtime/CORE.setting.moarvm:head)
 from gen/moar/stage2/QRegex.nqp:1340  (/home/clasclin/bin/rakudo-star-2016.11/install/share/nqp/lib/QRegex.moarvm:!reduce)
 from gen/moar/stage2/QRegex.nqp:1301  (/home/clasclin/bin/rakudo-star-2016.11/install/share/nqp/lib/QRegex.moarvm:!cursor_pass)
 from Asistencia.pm6:11  (<ephemeral file>:head)
 from Asistencia.pm6:10  (<ephemeral file>:html)
 from Asistencia.pm6:6  (<ephemeral file>:TOP)
 from SETTING::src/core/Grammar.pm:9  (/home/clasclin/bin/rakudo-star-2016.11/install/share/perl6/runtime/CORE.setting.moarvm:parse)
 from Asistencia.pm6:34  (<ephemeral file>:)
 from SETTING::src/core/Any-iterable-methods.pm:462  (/home/clasclin/bin/rakudo-star-2016.11/install/share/perl6/runtime/CORE.setting.moarvm:)
 from SETTING::src/core/Any-iterable-methods.pm:448  (/home/clasclin/bin/rakudo-star-2016.11/install/share/perl6/runtime/CORE.setting.moarvm:sink-all)
 from SETTING::src/core/Seq.pm:159  (/home/clasclin/bin/rakudo-star-2016.11/install/share/perl6/runtime/CORE.setting.moarvm:sink)
 from Asistencia.pm6:32  (<ephemeral file>:)
 from Asistencia.pm6:1  (<ephemeral file>:<unit>)
 from Asistencia.pm6:1  (<ephemeral file>:<unit-outer>)
 from gen/moar/stage2/NQPHLL.nqp:1437  (/home/clasclin/bin/rakudo-star-2016.11/install/share/nqp/lib/NQPHLL.moarvm:eval)
 from gen/moar/stage2/NQPHLL.nqp:1640  (/home/clasclin/bin/rakudo-star-2016.11/install/share/nqp/lib/NQPHLL.moarvm:evalfiles)
 from gen/moar/stage2/NQPHLL.nqp:1534  (/home/clasclin/bin/rakudo-star-2016.11/install/share/nqp/lib/NQPHLL.moarvm:command_eval)
 from src/Perl6/Compiler.nqp:27  (/home/clasclin/bin/rakudo-star-2016.11/install/share/nqp/lib/Perl6/Compiler.moarvm:command_eval)
 from gen/moar/stage2/NQPHLL.nqp:1508  (/home/clasclin/bin/rakudo-star-2016.11/install/share/nqp/lib/NQPHLL.moarvm:command_line)
 from gen/moar/m-main.nqp:46  (/home/clasclin/bin/rakudo-star-2016.11/install/share/perl6/runtime/perl6.moarvm:MAIN)
 from gen/moar/m-main.nqp:37  (/home/clasclin/bin/rakudo-star-2016.11/install/share/perl6/runtime/perl6.moarvm:<mainline>)
 from <unknown>:1  (/home/clasclin/bin/rakudo-star-2016.11/install/share/perl6/runtime/perl6.moarvm:<main>)
 from <unknown>:1  (/home/clasclin/bin/rakudo-star-2016.11/install/share/perl6/runtime/perl6.moarvm:<entry>)