From 8d668c2963c4322fea47009b057791c1a7caa612 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Sat, 20 Feb 2021 03:13:15 +0000
Subject: fix corner case in `conditionals` & `side_effects` (#4669)

fixes #4668
---
 test/compress/side_effects.js | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'test/compress')

diff --git a/test/compress/side_effects.js b/test/compress/side_effects.js
index 177cf503..994e884c 100644
--- a/test/compress/side_effects.js
+++ b/test/compress/side_effects.js
@@ -506,3 +506,34 @@ issue_4366_2: {
     expect_stdout: "PASS"
     node_version: ">=4"
 }
+
+issue_4668: {
+    options = {
+        conditionals: true,
+        keep_fargs: false,
+        keep_fnames: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function f(a) {
+            var b, c;
+            function g() {
+                return a = 0 + a, !d || (a = 0);
+            }
+            c = g();
+        }
+        console.log(f());
+        var d = 0;
+    }
+    expect: {
+        console.log(function f() {
+            (function g() {
+                0;
+            })();
+        }());
+    }
+    expect_stdout: "undefined"
+}
-- 
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