From 6e235602fb9d7876150a0abf5c918e28db240f2a Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Thu, 3 Sep 2020 18:51:26 +0100
Subject: fix corner case in `loops` & `unused` (#4092)

fixes #4091
---
 test/compress/loops.js | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

(limited to 'test')

diff --git a/test/compress/loops.js b/test/compress/loops.js
index 878b77cb..cbc1166f 100644
--- a/test/compress/loops.js
+++ b/test/compress/loops.js
@@ -1037,3 +1037,54 @@ issue_4084: {
     }
     expect_stdout: "undefined"
 }
+
+issue_4091_1: {
+    options = {
+        loops: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        try {
+            throw "FAIL";
+        } catch (e) {
+            for (var e in 42);
+        }
+        console.log(e && e);
+    }
+    expect: {
+        try {
+            throw "FAIL";
+        } catch (e) {
+            var e;
+        }
+        console.log(e && e);
+    }
+    expect_stdout: "undefined"
+}
+
+issue_4091_2: {
+    options = {
+        loops: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        try {
+            throw "FAIL";
+        } catch (e) {
+            for (e in 42);
+            var e;
+        }
+        console.log(e && e);
+    }
+    expect: {
+        try {
+            throw "FAIL";
+        } catch (e) {
+            var e;
+        }
+        console.log(e && e);
+    }
+    expect_stdout: "undefined"
+}
-- 
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