fix reference assignment to temporary

libwccl/ops/functions/bool/predicates/pointagreement.cpp

@@ -49,7 +49,7 @@ PointAgreement::BaseRetValPtr PointAgreement::apply_internal(const FunExecContex
 		// don't bother checking t2 unless current t1_tag matches enough categories
 		if (attribs->matching_categories(t1_tag) >= min_card) {
 			foreach (const Corpus2::Lexeme& t2_lex, t2->lexemes()) {
-				Corpus2::Tag& intersection = t1_tag.get_masked(t2_lex.tag());
+				Corpus2::Tag intersection = t1_tag.get_masked(t2_lex.tag());
 				// if the intersection matches enough categories we have agreement
 				if (attribs->matching_categories(intersection) >= min_card) {
 					return Predicate::True(context);