error: 'others' choice not allowed for an aggregate in this context

[wm2015email]

Compile in questasim, fails in ghdl:

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use ieee.fixed_pkg.all;
use ieee.math_real.all;                                                                                            

use std.textio.all;

package vector_types_pkg is

  type sfixed_vector is array (natural range <>) of sfixed;
  type ufixed_vector is array (natural range <>) of ufixed;
end package;

package body vector_types_pkg is

  function to_sfixed_vector (val : std_logic_vector; format : sfixed_vector) return sfixed_vector is
	  constant elem_proto : format'element := (others => '0');
    constant wi_elem    : natural        := elem_proto'length;
    constant num_elem   : natural        := format'length;

    constant val_up : std_logic_vector(0 to val'length-1) := val;
    variable norm   : sfixed_vector(0 to num_elem-1)(elem_proto'range);
    variable result : format'subtype;
  begin
    assert val'length = wi_elem*num_elem
      report "Input vector size doesn't match format size."
      severity failure;

    for ii in 0 to num_elem-1 loop
      norm(ii) := sfixed(val_up(ii*wi_elem to (ii+1)*wi_elem-1));
    end loop;
    result := norm;
    return result;
  end function;
  
end package body;

$ ghdl.exe -a -fsynopsys --warn-no-hide --std=08 --work=work types_broken.2008.vhd

types_broken.2008.vhd:4162:45:error: 'others' choice not allowed for an aggregate in this context
    constant elem_proto : format'element := (others => '0');
                                            ^
types_broken.2008.vhd:4200:45:error: 'others' choice not allowed for an aggregate in this context
    constant elem_proto : format'element := (others => '0');
                                            ^
types_broken.2008.vhd:4256:38:error: 'others' choice not allowed for an aggregate in this context
    constant aa_elem : aa'element := (others => '0');
                                     ^
types_broken.2008.vhd:4257:38:error: 'others' choice not allowed for an aggregate in this context
    constant bb_elem : bb'element := (others => '0');
                                     ^
types_broken.2008.vhd:4266:38:error: 'others' choice not allowed for an aggregate in this context
    constant aa_elem : aa'element := (others => '0');
                                     ^
types_broken.2008.vhd:4267:38:error: 'others' choice not allowed for an aggregate in this context
    constant bb_elem : bb'element := (others => '0');
                                     ^

Here's a link to my github where the code is stored:

https://github.com/wm2015email/MISC/tree/main/ghdl_bug_2008