From 902cd5c3eadf8deb52a25bbfe199a9dacdb2b12b Mon Sep 17 00:00:00 2001
From: notoria <notoria@users.noreply.github.com>
Date: Mon, 8 Jan 2024 21:50:02 +0100
Subject: [PATCH] Special case for `(^)/2`

The only solutions for `Z #= X^Z` are `X = Z, X in -1\/1`. Also helps
avoid big numbers.
---
 src/lib/clpz.pl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/lib/clpz.pl b/src/lib/clpz.pl
index 8c21a6e92..573094704 100644
--- a/src/lib/clpz.pl
+++ b/src/lib/clpz.pl
@@ -5454,6 +5454,7 @@
             morph_into_propagator(MState, [Y,Z], reified_eq(1,Y,1,0,[],Z), Morph)
         ;   Y == 0 -> kill(MState), Z = 1
         ;   Y == 1 -> kill(MState), Z = X
+        ;   Y == Z -> kill(MState), X = Y, queue_goal(X in -1\/1)
         ;   nonvar(X) ->
             (   nonvar(Y) ->
                 (   Y >= 0 -> true ; X =:= -1 ),