From c5386c3e884384610c8948aed39e64b2d248a4e3 Mon Sep 17 00:00:00 2001
From: Mark Thom <markjordanthom@gmail.com>
Date: Thu, 17 May 2018 13:14:38 -0600
Subject: [PATCH] correct for use in earlier releases of rust.

---
 src/prolog/ast.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/prolog/ast.rs b/src/prolog/ast.rs
index 721ec05d..5fac17a5 100644
--- a/src/prolog/ast.rs
+++ b/src/prolog/ast.rs
@@ -1504,8 +1504,8 @@ impl PartialOrd<Ref> for Addr {
                 },
             &Addr::HeapCell(h) =>
                 match r {
-                    Ref::StackCell(..) => Some(Ordering::Less),
-                    Ref::HeapCell(h1) => h.partial_cmp(h1)
+                    &Ref::StackCell(..) => Some(Ordering::Less),
+                    &Ref::HeapCell(h1) => h.partial_cmp(&h1)
                 },
             _ => None
         }
-- 
2.54.0