From 2cedc843a8dd9eb6abe5af7397a6da74a13203ac Mon Sep 17 00:00:00 2001
From: Christopher Monsanto <chris@monsan.to>
Date: Mon, 12 Jan 2015 16:49:28 -0500
Subject: [PATCH] don't print traceback on syntax error in CLI

---
 bin/6to5/util.js | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/bin/6to5/util.js b/bin/6to5/util.js
index 1adf6d5119..b4cd0141f4 100644
--- a/bin/6to5/util.js
+++ b/bin/6to5/util.js
@@ -20,7 +20,17 @@ exports.transform = function (filename, code, opts) {
   opts = _.extend(opts || {}, index.opts);
   opts.filename = filename;
 
-  var result = to5.transform(code, opts);
+  var result;
+  try {
+    result = to5.transform(code, opts);
+  } catch(e) {
+    if (e.name === "SyntaxError") {
+      console.error("SyntaxError:", e.message);
+      process.exit(1);
+    } else {
+      throw e;
+    }
+  }
   result.filename = filename;
   result.actual = code;
   return result;