Fix "container does not reference a native integer" in multi slice
Fix "container does not reference a native integer" in multi slice

We can now get IntLexRef as well as UIntLexRef. The latter doesn't unbox
directly to int, so we have to put the value into a Scalar first.

labster/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,labster/rakudo,tbrowder/rakudo,labster/rakudo,tbrowder/rakudo,salortiz/rakudo,labster/rakudo,MasterDuke17/rakudo,rakudo/rakudo,salortiz/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,rakudo/rakudo,tbrowder/rakudo,salortiz/rakudo,tbrowder/rakudo,salortiz/rakudo,MasterDuke17/rakudo,salortiz/rakudo,rakudo/rakudo,rakudo/rakudo,labster/rakudo,salortiz/rakudo,tbrowder/rakudo,rakudo/rakudo,labster/rakudo,rakudo/rakudo,MasterDuke17/rakudo