From e07e74f010f4f08a9e8aa8adef9f61fe238e4238 Mon Sep 17 00:00:00 2001
From: Amjad Masad <amjad.masad@gmail.com>
Date: Mon, 12 Jan 2015 17:32:02 -0500
Subject: [PATCH] Handle esprima-like AST catch clause in a TryStatement. Fixes
 #473

---
 lib/6to5/generation/generators/statements.js | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/lib/6to5/generation/generators/statements.js b/lib/6to5/generation/generators/statements.js
index 613fdcf630..f3a6babeab 100644
--- a/lib/6to5/generation/generators/statements.js
+++ b/lib/6to5/generation/generators/statements.js
@@ -107,7 +107,16 @@ exports.TryStatement = function (node, print) {
   this.keyword("try");
   print(node.block);
   this.space();
-  print(node.handler);
+
+  // Esprima bug puts the catch clause in a `handlers` array.
+  // see https://code.google.com/p/esprima/issues/detail?id=433
+  // We run into this from regenerator generated ast.
+  if (node.handlers) {
+    print(node.handlers[0]);
+  } else {
+    print(node.handler);
+  }
+
   if (node.finalizer) {
     this.space();
     this.push("finally ");