gcc/testsuite/gnat.dg/empty_vector_length.adb

   1 --  { dg-do run }
   2 --  { dg-options "-gnatp" }
   3
   4 procedure Empty_Vector_Length is
   5
   6    type Vector is array (Integer range <>) of Integer;
   7
   8    function Empty_Vector return Vector is
   9    begin
  10       return (2 .. Integer'First => 0);
  11    end;
  12
  13    My_Vector : Vector := Empty_Vector;
  14    My_Length : Integer := My_Vector'Length;
  15 begin
  16    if My_Length /= 0 then
  17       raise Program_Error;
  18    end if;
  19 end;