From f3fc8cb3d323a16affa8c3c828d18b4e5efcf9b1 Mon Sep 17 00:00:00 2001
From: alexlamsl <alexlamsl@gmail.com>
Date: Sat, 25 Mar 2017 15:29:14 +0800
Subject: [PATCH] fix stack

---
 lib/compress.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/compress.js b/lib/compress.js
index 5aed93e2..47eb4d73 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2584,7 +2584,8 @@ merge(Compressor.prototype, {
                     });
                 }
             });
-            tt.stack = compressor.stack.slice(); // so that's able to see parent nodes
+            // allow transform() to view the whole AST
+            tt.stack = compressor.stack.slice(0, -1);
             self = self.transform(tt);
         } catch(ex) {
             if (ex !== self) throw ex;