From 1e831df1f6a39ccc043384f04863aea58dbd7d9c Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Tue, 12 Jan 2021 01:12:43 +0000
Subject: fix corner case in `side_effects` (#4541)

fixes #4540
---
 test/compress/default-values.js | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'test/compress')

diff --git a/test/compress/default-values.js b/test/compress/default-values.js
index 23e31748..985651a3 100644
--- a/test/compress/default-values.js
+++ b/test/compress/default-values.js
@@ -1549,3 +1549,24 @@ issue_4523: {
     expect_stdout: "PASS"
     node_version: ">=6"
 }
+
+issue_4540: {
+    options = {
+        reduce_vars: true,
+        side_effects: true,
+    }
+    input: {
+        console.log(function() {
+            function f([ a = 0 ]) {}
+            f([]);
+        }());
+    }
+    expect: {
+        console.log(function() {
+            function f([ a = 0 ]) {}
+            f([]);
+        }());
+    }
+    expect_stdout: "undefined"
+    node_version: ">=6"
+}
-- 
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