https://sourceware.org/bugzilla/show_bug.cgi?id=24509

--- Comment #3 from Tom Tromey <tromey at sourceware dot org> ---
To check for negative values, I think you can add another
clause, here's what I did:

package Rng is

   type Rec (I : Integer) is record
      case I is
         when Positive =>
            C : Character;
            case I is
               when 1..15 | 17 | 23 =>
                  null;
               when others =>
                  N : Natural;
            end case;
         when -52..-1 =>
            Q: Natural;
         when others =>
            S : String (1 .. 10);
      end case;
   end record;

   R : Rec (1);

end Rng;


The proposed patch does not handle this properly:

 [    9f]        variant              abbrev: 5
                 discr_list           (block1) range: 76-127

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