Make error messages on "is default/dynamic" better
Make error messages on "is default/dynamic" better

This is really the result of trying to make "is default/dynamic" work
on shaped arrays.  This has failed, because at the moment the trait
code is run, the shaped array does not have a descriptor initialized
yet.  Which means we're trying to look up attributes in a type object,
and thus fail.

nbrown/rakudo,b2gills/rakudo,tbrowder/rakudo,tbrowder/rakudo,tbrowder/rakudo,lucasbuchala/rakudo,Gnouc/rakudo,raydiak/rakudo,azawawi/rakudo,softmoth/rakudo,Gnouc/rakudo,jonathanstowe/rakudo,tbrowder/rakudo,Gnouc/rakudo,samcv/rakudo,awwaiid/rakudo,MasterDuke17/rakudo,b2gills/rakudo,usev6/rakudo,labster/rakudo,labster/rakudo,MasterDuke17/rakudo,salortiz/rakudo,sjn/rakudo,MasterDuke17/rakudo,zostay/rakudo,salortiz/rakudo,b2gills/rakudo,dankogai/rakudo,samcv/rakudo,ab5tract/rakudo,ugexe/rakudo,sjn/rakudo,awwaiid/rakudo,ugexe/rakudo,usev6/rakudo,nbrown/rakudo,labster/rakudo,rakudo/rakudo,dankogai/rakudo,LLFourn/rakudo,softmoth/rakudo,LLFourn/rakudo,nbrown/rakudo,labster/rakudo,rakudo/rakudo,lucasbuchala/rakudo,raydiak/rakudo,ab5tract/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,salortiz/rakudo,azawawi/rakudo,sjn/rakudo,softmoth/rakudo,rakudo/rakudo,LLFourn/rakudo,dankogai/rakudo,rakudo/rakudo,ab5tract/rakudo,salortiz/rakudo,ugexe/rakudo,azawawi/rakudo,tbrowder/rakudo,zostay/rakudo,tony-o/rakudo,Gnouc/rakudo,rakudo/rakudo,sjn/rakudo,LLFourn/rakudo,tony-o/rakudo,jonathanstowe/rakudo,zostay/rakudo,samcv/rakudo,awwaiid/rakudo,lucasbuchala/rakudo,jonathanstowe/rakudo,usev6/rakudo,MasterDuke17/rakudo,usev6/rakudo,MasterDuke17/rakudo,b2gills/rakudo,dankogai/rakudo,tbrowder/rakudo,azawawi/rakudo,raydiak/rakudo,softmoth/rakudo,awwaiid/rakudo,dankogai/rakudo,lucasbuchala/rakudo,jonathanstowe/rakudo,nbrown/rakudo,labster/rakudo,salortiz/rakudo,ab5tract/rakudo,ab5tract/rakudo,sjn/rakudo,salortiz/rakudo,raydiak/rakudo,tony-o/rakudo,b2gills/rakudo,jonathanstowe/rakudo,nbrown/rakudo,tony-o/rakudo,samcv/rakudo,labster/rakudo,Gnouc/rakudo,tony-o/rakudo,azawawi/rakudo,rakudo/rakudo,samcv/rakudo,awwaiid/rakudo,lucasbuchala/rakudo,LLFourn/rakudo,softmoth/rakudo,nbrown/rakudo,ugexe/rakudo,zostay/rakudo,usev6/rakudo,tony-o/rakudo,ugexe/rakudo