prefix of array attribute must be an object name

[eine]

The MWE below is extracted from VUnit/vunit#631. Since a few days ago, the MWE fails during analysis:

test.vhd:14:54:error: prefix of array attribute must be an object name
ghdl:error: compilation error

I think it might be a regression, since the same code has worked for many months. Moreover, if the commented ret_range and ret_val are used instead, the MWE works as expected.

How to reproduce?

entity ent is
end;

architecture arch of ent is

  type range_t is array (integer range <>) of bit;

  function get_range (constant code : string) return range_t is
    constant ret_val : range_t(1 to 10) := (others => '0');
  begin
    return ret_val;
  end function get_range;

  signal ret_val : boolean_vector(get_range("HELLO")'range) := (others => false);

  --constant ret_range : range_t := get_range("HELLO");
  --signal ret_val : boolean_vector(ret_range) := (others => false);
begin
end;

ghdl -a --std=08 ent.vhd

[tgingold]

No, that's a rule that wasn't followed. You can use -frelaxed to bypass it.