Re: [C++ Patch] Improve compute_array_index_type locations

[Paolo Carlini]

.. by the way, we could pass the location to abstract_virtuals_error 
too, thus fixing the locations of tests like other/abstract1.C and 
abstract2.C, where we currently hit the case:

      else if (identifier_p (decl))
    /* Here we do not have location information.  */
    error ("invalid abstract type %qT for %qE", type, decl);
not sure if it's worth it. What do you think?

Thanks, Paolo.