From 7a033bb825975a6a729813b2cbe5a722a9047456 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Fri, 8 May 2020 04:49:17 +0100
Subject: fix corner case in `join_vars` (#3857)

fixes #3856
---
 lib/compress.js | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'lib/compress.js')

diff --git a/lib/compress.js b/lib/compress.js
index ffdd5ccc..4dae2a9f 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2579,6 +2579,8 @@ merge(Compressor.prototype, {
                     }
                     if (node instanceof AST_Scope) return node;
                     if (!(node instanceof AST_Statement)) return node;
+                }, function(node) {
+                    if (node instanceof AST_For && is_empty(node.init)) node.init = null;
                 }));
             }
         }
-- 
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