From 6bf36b73ef0463e54b4bb76e23746390de669062 Mon Sep 17 00:00:00 2001
From: pborunda <pborunda@gmail.com>
Date: Sat, 25 Feb 2017 10:34:26 -0700
Subject: [PATCH] Add drop_error to new Error

Apply option to new Error also
---
 lib/compress.js | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/lib/compress.js b/lib/compress.js
index 9e07e724..0f0cee36 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2627,6 +2627,23 @@ merge(Compressor.prototype, {
     });
 
     OPT(AST_New, function(self, compressor){
+
+        if (compressor.option("drop_error")) {
+            var exp = self.expression;
+            if (exp instanceof AST_SymbolRef
+                && (exp.name == "Error" || 
+                    exp.name == "EvalError" || 
+                    exp.name == "InternalError" || 
+                    exp.name == "RangeError" || 
+                    exp.name == "ReferenceError" || 
+                    exp.name == "SyntaxError" || 
+                    exp.name == "TypeError" || 
+                    exp.name == "URIError")
+                && exp.undeclared()) {
+                   // drop error description(s)
+                   self.args = [];
+                }
+        }
         if (compressor.option("unsafe")) {
             var exp = self.expression;
             if (exp instanceof AST_SymbolRef && exp.undeclared()) {