Check proto as well as candidates in optimizer.
Check proto as well as candidates in optimizer.

This fixes issues where we could end up inlining calls to candidates
that would never be reachable due to restrictions in the proto. Also,
we catch some such issues at compile time now.

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