From 8926a2f327f9954e856161169a92a4190f0318e4 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Tue, 20 Jul 2021 18:10:58 +0100
Subject: fix corner case in `unused` (#5090)

fixes #5089
---
 lib/compress.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib/compress.js')

diff --git a/lib/compress.js b/lib/compress.js
index c5d75d42..6d1f93d4 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -7276,6 +7276,7 @@ merge(Compressor.prototype, {
             }
 
             function retain_lhs(node) {
+                if (node instanceof AST_DefaultValue) return retain_lhs(node.name);
                 if (node instanceof AST_Destructured) {
                     if (value === null) {
                         value = make_node(AST_Number, node, { value: 0 });
@@ -7289,7 +7290,6 @@ merge(Compressor.prototype, {
                     }
                     return make_node(AST_DestructuredObject, node, { properties: [] });
                 }
-                if (node instanceof AST_DefaultValue) node = node.name;
                 node.__unused = null;
                 return node;
             }
-- 
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