From 9e6b128374c62ee9f6238134fdc207ec9dc86284 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Fri, 10 Mar 2017 03:15:21 +0800
Subject: fix catch variable reference in IE8 (#1587)

`AST_Scope.def_variable()` will overwrite `AST_Symbol.thedef`, so save a copy before calling.

fixes #1586
---
 lib/scope.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'lib/scope.js')

diff --git a/lib/scope.js b/lib/scope.js
index f23c8fe2..483503ee 100644
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -212,9 +212,10 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
         self.walk(new TreeWalker(function(node, descend) {
             if (node instanceof AST_SymbolCatch) {
                 var name = node.name;
+                var refs = node.thedef.references;
                 var scope = node.thedef.scope.parent_scope;
                 var def = scope.find_variable(name) || self.globals.get(name) || scope.def_variable(node);
-                node.thedef.references.forEach(function(ref) {
+                refs.forEach(function(ref) {
                     ref.thedef = def;
                     ref.reference(options);
                 });
-- 
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