From 4f5d12c573341821b2f198a5aa0bf5f1996d437d Mon Sep 17 00:00:00 2001
From: alexlamsl <alexlamsl@gmail.com>
Date: Thu, 7 Dec 2017 23:36:39 +0800
Subject: [PATCH] faster fail-over

---
 lib/compress.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/compress.js b/lib/compress.js
index 7d1f8cc3..e59dce63 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -4655,6 +4655,7 @@ merge(Compressor.prototype, {
         var arg_index;
         if (consequent instanceof AST_Call
             && alternative.TYPE === consequent.TYPE
+            && consequent.args.length > 0
             && consequent.args.length == alternative.args.length
             && consequent.expression.equivalent_to(alternative.expression)
             && !self.condition.has_side_effects(compressor)