From 63b04a687aec5659532d8a89f4cd016558059a8e Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Wed, 21 Sep 2022 16:11:46 +0100
Subject: [PATCH] minor tweaks (#5672)

---
 lib/compress.js | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/lib/compress.js b/lib/compress.js
index 7935aab6..2d084086 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -11607,11 +11607,15 @@ Compressor.prototype.compress = function(node) {
                         right: right.right,
                     }),
                 });
-                left.fixed = function() {
-                    return assign.right;
-                };
-                left.fixed.assigns = [ assign ];
-                left.definition().references.push(left);
+                if (left.fixed) {
+                    left.fixed = function() {
+                        return assign.right;
+                    };
+                    left.fixed.assigns = [ assign ];
+                }
+                var def = left.definition();
+                def.references.push(left);
+                def.replaced++;
                 return assign.optimize(compressor);
             }
         }