From 6f8c4c8cd339859a6ac4f666168852add4e8ed82 Mon Sep 17 00:00:00 2001
From: alexlamsl <alexlamsl@gmail.com>
Date: Thu, 9 Nov 2017 13:45:56 +0800
Subject: [PATCH] remove hack in `collapse_vars`

fixes #2456
---
 lib/compress.js | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/compress.js b/lib/compress.js
index 6354197d..e457d808 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1062,7 +1062,7 @@ merge(Compressor.prototype, {
                 var found = false;
                 return statements[stat_index].transform(new TreeTransformer(function(node, descend, in_list) {
                     if (found) return node;
-                    if (node === expr) {
+                    if (node === expr || node.body === expr) {
                         found = true;
                         if (node instanceof AST_VarDef) {
                             drop_decl(node.name.definition());
@@ -1076,7 +1076,6 @@ merge(Compressor.prototype, {
                       case 0: return null;
                       case 1: return node.expressions[0];
                     }
-                    if (node instanceof AST_SimpleStatement && !node.body) return null;
                 }));
             }