At: "001.hac":3:
parse error: syntax error
parser stacks:
state	value
#STATE#	(null) 
#STATE#	(null) 
#STATE#	(null) 
#STATE#	keyword: defproc [3:1..7]
#STATE#	identifier: empty [3:9..13]
#STATE#	( [3:14]
#STATE#	(chan-type) [3:15..19]
#STATE#	( [3:20]
#STATE#	list<(type-ref)>: ... [0:0]
#STATE#	keyword: chan [3:21..24]
in state #STATE#, possible rules are:
	data_type_ref_list_optional_in_parens: '(' data_type_ref_list_optional . ')'  (#RULE#)
acceptable tokens are: 
	')' (shift)
