From 2088e1c19d97955b5582e08396fca8c7b7dadd83 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Fri, 9 Feb 2018 06:54:37 +0800
Subject: fix AST corruption due to `collapse_vars` & `inline` (#2899)

fixes #2898
---
 test/compress/functions.js | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'test')

diff --git a/test/compress/functions.js b/test/compress/functions.js
index 87328820..a964f104 100644
--- a/test/compress/functions.js
+++ b/test/compress/functions.js
@@ -1989,3 +1989,33 @@ issue_2783: {
     }
     expect_stdout: "PASS"
 }
+
+issue_2898: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        reduce_vars: true,
+        sequences: true,
+        unused: true,
+    }
+    input: {
+        var c = 0;
+        (function() {
+            while (f());
+            function f() {
+                var b = (c = 1 + c, void (c = 1 + c));
+                b && b[0];
+            }
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        (function() {
+            while (b = void 0, void ((b = void (c = 1 + (c = 1 + c))) && b[0]));
+            var b;
+        })(),
+        console.log(c);
+    }
+    expect_stdout: "2"
+}
-- 
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