# Pastebin 59r0bHTk
% rakudobrew exec perl6 -e '     

class A {
   require Zef::CLI;

   #say Zef::CLI

}

'
Cannot invoke this object (REPR: Null; VMNull)
  in sub guess-path at /Users/fernando/.rakudobrew/versions/moar-2019.07.1/install/share/perl6/site/sources/85E0B1C2E081527483F78DBBAC3D9B6A62B659BF (Zef::Config) line 21
  in sub preprocess-args-config-mutate at /Users/fernando/.rakudobrew/versions/moar-2019.07.1/install/share/perl6/site/sources/7BEE833B64D5C6865ADC3C24095E59266B82195F (Zef::CLI) line 823
  in block <unit> at /Users/fernando/.rakudobrew/versions/moar-2019.07.1/install/share/perl6/site/sources/7BEE833B64D5C6865ADC3C24095E59266B82195F (Zef::CLI) line 16
  in block <unit> at -e line 4