expr13.icn: 10	| dummy(1,&null,&null,&null,&null)
expr13.icn: 4	| dummy suspended 1
expr13.icn: 13	| dummy(1,2.0,&null,[],&null)
expr13.icn: 4	| dummy suspended 1
expr13.icn: 14	| dummy(&null,&null,&null,&null,&null)
expr13.icn: 4	| dummy suspended &null
expr13.icn: 15	main failed