From c296a63fb338a6edba6682d821351255e8935fd9 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Sat, 24 Apr 2021 13:04:31 +0100
Subject: fix corner case in `collapse_vars` (#4866)

fixes #4865
---
 test/compress/collapse_vars.js | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'test/compress/collapse_vars.js')

diff --git a/test/compress/collapse_vars.js b/test/compress/collapse_vars.js
index 451681b6..4051bb14 100644
--- a/test/compress/collapse_vars.js
+++ b/test/compress/collapse_vars.js
@@ -8993,3 +8993,20 @@ issue_4852: {
     }
     expect_stdout: "PASS"
 }
+
+issue_4865: {
+    options = {
+        collapse_vars: true,
+    }
+    input: {
+        var NaN;
+        var a = NaN = "PASS";
+        console.log(a, NaN);
+    }
+    expect: {
+        var NaN;
+        var a = NaN = "PASS";
+        console.log(a, NaN);
+    }
+    expect_stdout: true
+}
-- 
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