From f08f539768bf21e7e63209fbbc1d7a263b67dcb2 Mon Sep 17 00:00:00 2001
From: Markus Triska <triska@metalevel.at>
Date: Tue, 11 Apr 2023 21:24:34 +0200
Subject: [PATCH] do not create attributed variables for ground tuples

---
 src/lib/clpz.pl | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/lib/clpz.pl b/src/lib/clpz.pl
index 2c412ac3..daed1471 100644
--- a/src/lib/clpz.pl
+++ b/src/lib/clpz.pl
@@ -4369,9 +4369,11 @@ tuple_domain([T|Ts], Relation0) -->
         tuple_domain(Ts, Relation1).
 
 tuple_freeze(Tuple, Relation) :-
-        put_attr(R, clpz_relation, Relation),
-        make_propagator(rel_tuple(R, Tuple), Prop),
-        tuple_freeze_(Tuple, Prop).
+        (   ground(Tuple) -> true
+        ;   put_attr(R, clpz_relation, Relation),
+            make_propagator(rel_tuple(R, Tuple), Prop),
+            tuple_freeze_(Tuple, Prop)
+        ).
 
 tuple_freeze_([], _).
 tuple_freeze_([T|Ts], Prop) :-
-- 
2.54.0