ref_to_implicit_pred.m:008: In `test':
ref_to_implicit_pred.m:008:   error: determinism declaration not satisfied.
ref_to_implicit_pred.m:008:   Declared `det', inferred `failure'.
ref_to_implicit_pred.m:013: Error: clause for predicate `p'/2
ref_to_implicit_pred.m:013:   without corresponding `:- pred' declaration.
ref_to_implicit_pred.m:013: Inferred :- pred p((pred), (pred)).
ref_to_implicit_pred.m:014: Error: reference to undeclared function or
ref_to_implicit_pred.m:014:   predicate `p'/2.