Compile error when declaring alias after usage

[ssrmm]

The following code produced the compiler-error error : Unbound name 'Bar':

namespace Test
{
  syntax module Test
  {
    using Nitra.Core;

    token Foo = "ASDF";

    token MultipleBar = Bar+;

    alias Bar = Foo;
  }
}

If I switch the rules MultipleBar and Bar everything works fine.