From db433f852f7870db85c8d944d0d0a06ef166870f Mon Sep 17 00:00:00 2001
From: alexlamsl <alexlamsl@gmail.com>
Date: Fri, 10 Nov 2017 11:48:12 +0800
Subject: [PATCH] suppress `hoist_props` on `export`

fixes #2462
---
 lib/compress.js              |  6 ++++--
 test/compress/hoist_props.js | 19 +++++++++++++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/lib/compress.js b/lib/compress.js
index 8ebecd7f..432755b1 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2895,7 +2895,8 @@ merge(Compressor.prototype, {
         self.variables.each(function(def, name) {
             var_names[name] = true;
         });
-        return self.transform(new TreeTransformer(function(node) {
+        var tt = new TreeTransformer(function(node) {
+            if (node instanceof AST_Definitions && tt.parent() instanceof AST_Export) return node;
             if (node instanceof AST_VarDef) {
                 var sym = node.name, def, value;
                 if (sym.scope === self
@@ -2946,7 +2947,8 @@ merge(Compressor.prototype, {
                 var_names[name] = true;
                 return new_var;
             }
-        }));
+        });
+        return self.transform(tt);
     });
 
     // drop_side_effect_free()
diff --git a/test/compress/hoist_props.js b/test/compress/hoist_props.js
index b2925af6..6d612816 100644
--- a/test/compress/hoist_props.js
+++ b/test/compress/hoist_props.js
@@ -511,3 +511,22 @@ new_this: {
     }
     expect_stdout: "1 2"
 }
+
+issue_2462: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+    }
+    input: {
+        export const Foo = {
+            a: 1,
+            b: () => 2
+        };
+    }
+    expect: {
+        export const Foo = {
+            a: 1,
+            b: () => 2
+        };
+    }
+}