SubstitutionException
Thrown when a Substitution was expected to be (or to produce) a Substitution.Unifier, but turned out to be a Substitution.Fail instead — e.g. by Scope.unifierOf when the given assignments are contradictory.
Thrown when a Substitution was expected to be (or to produce) a Substitution.Unifier, but turned out to be a Substitution.Fail instead — e.g. by Scope.unifierOf when the given assignments are contradictory.