constructor_warning.m:020: In clause for predicate `bar'/1: constructor_warning.m:020: in argument 1 of clause head: constructor_warning.m:020: error: wrong number of arguments (0; should be 1 constructor_warning.m:020: or 2) in use of constructor `foo_baz'. constructor_warning.m:021: In clause for predicate `bar'/1: constructor_warning.m:021: in argument 1 of clause head: constructor_warning.m:021: error: wrong number of arguments (1; should be 0) constructor_warning.m:021: in use of constructor `fanta_fanta_fanta'.