From 26a01a5c52c2e723509339d7168dbf260a42126d Mon Sep 17 00:00:00 2001
From: alexlamsl <alexlamsl@gmail.com>
Date: Wed, 29 Nov 2017 06:05:30 +0800
Subject: [PATCH] backport test from #2526

---
 test/compress/reduce_vars.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/test/compress/reduce_vars.js b/test/compress/reduce_vars.js
index 82b5ad6d..a8c151f1 100644
--- a/test/compress/reduce_vars.js
+++ b/test/compress/reduce_vars.js
@@ -4525,3 +4525,21 @@ issue_2485: {
     }
     expect_stdout: "6"
 }
+
+issue_2455: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        function foo() {
+            var that = this;
+            for (;;) that.bar();
+        }
+    }
+    expect: {
+        function foo() {
+            for (;;) this.bar();
+        }
+    }
+}