VSG Crashes when an alias uses a VHDL-2008 reference with subtype

[masubious]

Environment
Win 10

Describe the bug
As per Title. VSG Crashes when using a specific VHDL Construct (Aliasing a VHDL-2008 referenced Signal that is a Subtype e.g. natural range 0 to 15)

To Reproduce

vsg -f .\alias_reference_fail.vhd
Error while processing .\alias_reference_fail.vhd:
Error: Unexpected token detected while parsing alias_declaration @ Line 39, Column 129 in file .\alias_reference_fail.vhd
       Expecting : is
       Found     : ;

File looks like this:

ARCHITECTURE behaviour OF testcase IS
BEGIN
  proc_test_sequencer : PROCESS
    ALIAS s_event_count : natural RANGE 0 TO 2**16 - 1 IS << SIGNAL some.reference.some_signal : natural RANGE 0 TO 2**16 - 1 >>;
  BEGIN
  END PROCESS proc_test_sequencer;
END ARCHITECTURE behaviour;