At: "string-003.hac":6:
parse error: syntax error
parser stacks:
state	value
#STATE#	(null) 
#STATE#	(array-concatenation) [4:53]
#STATE#	$end
in state #STATE#, possible rules are:
	nonempty_alias_list: complex_aggregate_reference . '=' complex_aggregate_reference  (#RULE#)
acceptable tokens are: 
	'=' (shift)
