Annoyingly, 2017.07 has a bug that makes every --ll-exception print that exact error. Here's what a newer version of rakudo gives you:
> Cannot invoke this object (REPR: Null; VMNull) > at SETTING::src/core/Exception.pm:57 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:throw) > from SETTING::src/core/CompUnit/PrecompilationRepository.pm:81 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:) > from SETTING::src/core/CompUnit/PrecompilationRepository.pm:79 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:) > from <unknown>:1 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:) > from <unknown>:1 > (/tmp/.precomp/D9F3CABC797F4C68B8C92AB15C271BDDF8756DF0.1502129121.89224/20/201A6B3053CC1422D2C3670B62616221D2290929:) > from SETTING::src/core/Exception.pm:54 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:throw) > from SETTING::src/core/control.pm:170 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:die) > from SETTING::src/core/control.pm:166 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:die) > from /tmp/Foo.pm6 (Foo):1 > (/tmp/.precomp/D9F3CABC797F4C68B8C92AB15C271BDDF8756DF0.1502129121.89224/20/201A6B3053CC1422D2C3670B62616221D2290929:) > from /tmp/Foo.pm6 (Foo):1 > (/tmp/.precomp/D9F3CABC797F4C68B8C92AB15C271BDDF8756DF0.1502129121.89224/20/201A6B3053CC1422D2C3670B62616221D2290929:<unit>) > from /tmp/Foo.pm6 (Foo):1 > (/tmp/.precomp/D9F3CABC797F4C68B8C92AB15C271BDDF8756DF0.1502129121.89224/20/201A6B3053CC1422D2C3670B62616221D2290929:<unit-outer>) > from <unknown>:1 > (/tmp/.precomp/D9F3CABC797F4C68B8C92AB15C271BDDF8756DF0.1502129121.89224/20/201A6B3053CC1422D2C3670B62616221D2290929:<load>) > from SETTING::src/core/CompUnit/Loader.pm:50 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:load-precompilation-file) > from SETTING::src/core/CompUnit/Loader.pm:33 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:load-precompilation-file) > from SETTING::src/core/CompUnit/PrecompilationRepository.pm:71 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:load-handle-for-path) > from SETTING::src/core/CompUnit/PrecompilationRepository.pm:195 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:) > from SETTING::src/core/CompUnit/PrecompilationRepository.pm:191 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:load) > from SETTING::src/core/CompUnit/PrecompilationRepository.pm:166 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:load) > from SETTING::src/core/CompUnit/PrecompilationRepository.pm:46 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:try-load) > from SETTING::src/core/CompUnit/Repository/FileSystem.pm:128 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:) > from SETTING::src/core/CompUnit/Repository/FileSystem.pm:121 > (/home/timo/perl6/install/share/perl6/runtime/CORE.setting.moarvm:need) > from src/Perl6/World.nqp:1218 > (/home/timo/perl6/install/share/nqp/lib/Perl6/World.moarvm:load_module) > from src/Perl6/World.nqp:1148 > (/home/timo/perl6/install/share/nqp/lib/Perl6/World.moarvm:do_pragma_or_load_module) > from src/Perl6/World.nqp:616 > (/home/timo/perl6/install/share/nqp/lib/Perl6/World.moarvm:loading_and_symbol_setup) > from src/Perl6/Grammar.nqp:1188 > (/home/timo/perl6/install/share/nqp/lib/Perl6/Grammar.moarvm:comp_unit) > from src/Perl6/Grammar.nqp:495 > (/home/timo/perl6/install/share/nqp/lib/Perl6/Grammar.moarvm:TOP) > from gen/moar/stage2/QRegex.nqp:2324 > (/home/timo/perl6/install/share/nqp/lib/QRegex.moarvm:parse) > from gen/moar/stage2/NQPHLL.nqp:1935 > (/home/timo/perl6/install/share/nqp/lib/NQPHLL.moarvm:parse) > from gen/moar/stage2/NQPHLL.nqp:1848 > (/home/timo/perl6/install/share/nqp/lib/NQPHLL.moarvm:execute_stage) > from gen/moar/stage2/NQPHLL.nqp:1884 > (/home/timo/perl6/install/share/nqp/lib/NQPHLL.moarvm:run) > from gen/moar/stage2/NQPHLL.nqp:1887 > (/home/timo/perl6/install/share/nqp/lib/NQPHLL.moarvm:) > from gen/moar/stage2/NQPHLL.nqp:1873 > (/home/timo/perl6/install/share/nqp/lib/NQPHLL.moarvm:compile) > from gen/moar/stage2/NQPHLL.nqp:1588 > (/home/timo/perl6/install/share/nqp/lib/NQPHLL.moarvm:eval) > from gen/moar/stage2/NQPHLL.nqp:1713 > (/home/timo/perl6/install/share/nqp/lib/NQPHLL.moarvm:) > from gen/moar/stage2/NQPHLL.nqp:1753 > (/home/timo/perl6/install/share/nqp/lib/NQPHLL.moarvm:command_eval) > from src/Perl6/Compiler.nqp:42 > (/home/timo/perl6/install/share/nqp/lib/Perl6/Compiler.moarvm:command_eval) > from gen/moar/stage2/NQPHLL.nqp:1694 > (/home/timo/perl6/install/share/nqp/lib/NQPHLL.moarvm:command_line) > from gen/moar/main.nqp:47 > (/home/timo/perl6/install/share/perl6/runtime/perl6.moarvm:MAIN) > from gen/moar/main.nqp:38 > (/home/timo/perl6/install/share/perl6/runtime/perl6.moarvm:<mainline>) > from <unknown>:1 > (/home/timo/perl6/install/share/perl6/runtime/perl6.moarvm:<main>) > from <unknown>:1 > (/home/timo/perl6/install/share/perl6/runtime/perl6.moarvm:<entry>) This is Rakudo version 2017.07-137-g46ef1b5 built on MoarVM version 2017.07-346-g0fe5cd6