From a84beafd1bbdb61ea5fc3662e349f6c960f1ba66 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Wed, 24 Apr 2019 02:50:15 +0800
Subject: fix corner case in `assignments` (#3376)

fixes #3375
---
 test/compress/assignment.js  | 22 ++++++++++++++++++++++
 test/compress/drop-unused.js | 21 +++++++++++++++++++++
 2 files changed, 43 insertions(+)

(limited to 'test')

diff --git a/test/compress/assignment.js b/test/compress/assignment.js
index ba412583..ece0185d 100644
--- a/test/compress/assignment.js
+++ b/test/compress/assignment.js
@@ -289,3 +289,25 @@ increment_decrement_2: {
     }
     expect_stdout: "42"
 }
+
+issue_3375: {
+    options = {
+        assignments: true,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(typeof function(b) {
+            var a = b += 1;
+            --b;
+            return a;
+        }("object"));
+    }
+    expect: {
+        console.log(typeof function(b) {
+            var a = b += 1;
+            --b;
+            return a;
+        }("object"));
+    }
+    expect_stdout: "string"
+}
diff --git a/test/compress/drop-unused.js b/test/compress/drop-unused.js
index b75c3ac5..74fe3693 100644
--- a/test/compress/drop-unused.js
+++ b/test/compress/drop-unused.js
@@ -2005,3 +2005,24 @@ issue_3233: {
     }
     expect_stdout: "PASS"
 }
+
+issue_3375: {
+    options = {
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var b = 1;
+        var a = c = [], c = --b + ("function" == typeof f && f());
+        var a = c && c[a];
+        console.log(a, b);
+    }
+    expect: {
+        var b = 1;
+        var a = [], c = --b + ("function" == typeof f && f());
+        a = c && c[a];
+        console.log(a, b);
+    }
+    expect_stdout: "0 0"
+}
-- 
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