From 83b124f0d652e618c6e3f0f57667c8a4a1224217 Mon Sep 17 00:00:00 2001
From: Jann Horn <jann@thejh.net>
Date: Fri, 14 Oct 2016 18:04:39 +0200
Subject: [PATCH] fix uses_arguments handling (broken since 6605d1578351)

Using the symbol declaration tracking of UglifyJS doesn't make sense here
anyway, `arguments` always comes from something in the current scope.

fixes #1299
---
 lib/scope.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/scope.js b/lib/scope.js
index fb583291..4943b568 100644
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -204,6 +204,9 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
                 }
             }
             var sym = node.scope.find_variable(name);
+            if (node.scope instanceof AST_Lambda && name == "arguments") {
+                node.scope.uses_arguments = true;
+            }
             if (!sym) {
                 var g;
                 if (globals.has(name)) {
@@ -215,9 +218,6 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
                     globals.set(name, g);
                 }
                 sym = g;
-                if (func && name == "arguments") {
-                    func.uses_arguments = true;
-                }
             }
             node.thedef = sym;
             if (parent instanceof AST_Unary && (parent.operator === '++' || parent.operator === '--')