From 9469c03ac976b3cfc1e52abf034ce76f1d6aca59 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Sun, 2 Apr 2017 17:07:20 +0800
Subject: fix corner case in `switch` (#1765)

---
 lib/compress.js | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'lib')

diff --git a/lib/compress.js b/lib/compress.js
index 763490a7..79e7d4d2 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2557,7 +2557,7 @@ merge(Compressor.prototype, {
                 if (!default_branch) {
                     default_branch = branch;
                 } else {
-                    eliminate_branch(branch);
+                    eliminate_branch(branch, body[body.length - 1]);
                 }
             } else if (value !== self.expression) {
                 var exp = branch.expression.evaluate(compressor);
@@ -2570,7 +2570,7 @@ merge(Compressor.prototype, {
                         default_branch = null;
                     }
                 } else if (exp !== branch.expression) {
-                    eliminate_branch(branch);
+                    eliminate_branch(branch, body[body.length - 1]);
                     continue;
                 }
             }
@@ -2583,7 +2583,7 @@ merge(Compressor.prototype, {
             }
             body.push(branch);
         }
-        while (i < len) eliminate_branch(self.body[i++]);
+        while (i < len) eliminate_branch(self.body[i++], body[body.length - 1]);
         if (body.length > 0) {
             body[0].body = decl.concat(body[0].body);
         }
@@ -2626,7 +2626,6 @@ merge(Compressor.prototype, {
         return self;
 
         function eliminate_branch(branch, prev) {
-            if (!prev) prev = body[body.length - 1];
             if (prev && !aborts(prev)) {
                 prev.body = prev.body.concat(branch.body);
             } else {
-- 
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