make warnings about undefined values in regexes matches useful
make warnings about undefined values in regexes matches useful

before:
  perl6-m -e 'Any ~~ /./'
  use of uninitialized value of type Any in string context
    in any !cursor_init at gen/moar/stage2/QRegex.nqp:1068

  perl6-m -e 'EVAL "Any ~~ /./"'
  use of uninitialized value of type Any in string context
    in any !cursor_init at gen/moar/stage2/QRegex.nqp:1069

after:
  perl6-m -e 'Any ~~ /./'
  use of uninitialized value of type Any in string context
    in block <unit> at -e:1

  perl6-m -e 'EVAL "Any ~~ /./"'
  use of uninitialized value of type Any in string context
    in block <unit> at EVAL_0:1

paultcochrane/rakudo,MasterDuke17/rakudo,salortiz/rakudo,retupmoca/rakudo,nunorc/rakudo,tony-o/rakudo,MasterDuke17/rakudo,nbrown/rakudo,nunorc/rakudo,labster/rakudo,dankogai/rakudo,nbrown/rakudo,tbrowder/rakudo,tony-o/deb-rakudodaily,samcv/rakudo,ungrim97/rakudo,sergot/rakudo,nbrown/rakudo,cygx/rakudo,zhuomingliang/rakudo,tony-o/rakudo,laben/rakudo,sergot/rakudo,lucasbuchala/rakudo,ugexe/rakudo,laben/rakudo,ungrim97/rakudo,tbrowder/rakudo,ab5tract/rakudo,salortiz/rakudo,MasterDuke17/rakudo,ungrim97/rakudo,nunorc/rakudo,nbrown/rakudo,jonathanstowe/rakudo,b2gills/rakudo,b2gills/rakudo,labster/rakudo,tony-o/rakudo,teodozjan/rakudo,tony-o/rakudo,rakudo/rakudo,usev6/rakudo,tbrowder/rakudo,labster/rakudo,zostay/rakudo,retupmoca/rakudo,LLFourn/rakudo,salortiz/rakudo,tony-o/deb-rakudodaily,raydiak/rakudo,tony-o/rakudo,MasterDuke17/rakudo,sjn/rakudo,cygx/rakudo,paultcochrane/rakudo,softmoth/rakudo,nunorc/rakudo,tony-o/rakudo,b2gills/rakudo,paultcochrane/rakudo,LLFourn/rakudo,niner/rakudo,MasterDuke17/rakudo,raydiak/rakudo,laben/rakudo,skids/rakudo,Leont/rakudo,paultcochrane/rakudo,azawawi/rakudo,skids/rakudo,rakudo/rakudo,rakudo/rakudo,salortiz/rakudo,ab5tract/rakudo,samcv/rakudo,dankogai/rakudo,Gnouc/rakudo,teodozjan/rakudo,ugexe/rakudo,jonathanstowe/rakudo,lucasbuchala/rakudo,tbrowder/rakudo,cognominal/rakudo,cygx/rakudo,awwaiid/rakudo,retupmoca/rakudo,Gnouc/rakudo,ab5tract/rakudo,salortiz/rakudo,lucasbuchala/rakudo,zhuomingliang/rakudo,usev6/rakudo,teodozjan/rakudo,dankogai/rakudo,cygx/rakudo,zostay/rakudo,ab5tract/rakudo,cognominal/rakudo,labster/rakudo,ugexe/rakudo,tony-o/deb-rakudodaily,ugexe/rakudo,azawawi/rakudo,softmoth/rakudo,ab5tract/rakudo,usev6/rakudo,ungrim97/rakudo,Leont/rakudo,rakudo/rakudo,sergot/rakudo,rakudo/rakudo,sjn/rakudo,Leont/rakudo,azawawi/rakudo,awwaiid/rakudo,zhuomingliang/rakudo,awwaiid/rakudo,ugexe/rakudo,usev6/rakudo,skids/rakudo,cognominal/rakudo,jonathanstowe/rakudo,samcv/rakudo,LLFourn/rakudo,nbrown/rakudo,skids/rakudo,rakudo/rakudo,sergot/rakudo,b2gills/rakudo,softmoth/rakudo,tbrowder/rakudo,azawawi/rakudo,Gnouc/rakudo,usev6/rakudo,Leont/rakudo,tony-o/deb-rakudodaily,b2gills/rakudo,teodozjan/rakudo,dankogai/rakudo,awwaiid/rakudo,cognominal/rakudo,LLFourn/rakudo,sjn/rakudo,lucasbuchala/rakudo,laben/rakudo,cognominal/rakudo,zostay/rakudo,tony-o/deb-rakudodaily,tbrowder/rakudo,dankogai/rakudo,tony-o/deb-rakudodaily,Gnouc/rakudo,tony-o/deb-rakudodaily,labster/rakudo,niner/rakudo,Gnouc/rakudo,awwaiid/rakudo,samcv/rakudo,jonathanstowe/rakudo,niner/rakudo,Gnouc/rakudo,softmoth/rakudo,lucasbuchala/rakudo,labster/rakudo,ungrim97/rakudo,raydiak/rakudo,MasterDuke17/rakudo,paultcochrane/rakudo,zostay/rakudo,niner/rakudo,zhuomingliang/rakudo,jonathanstowe/rakudo,nbrown/rakudo,softmoth/rakudo,raydiak/rakudo,LLFourn/rakudo,skids/rakudo,azawawi/rakudo,cygx/rakudo,retupmoca/rakudo,samcv/rakudo,sjn/rakudo,sjn/rakudo,salortiz/rakudo