From 39fbd550c4c8a4e5f3fe811312deb27d7c74d129 Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Wed, 12 Aug 2015 02:57:36 +0100
Subject: [PATCH] also transforming of File asts

---
 packages/babel-core/src/helpers/normalize-ast.js | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/packages/babel-core/src/helpers/normalize-ast.js b/packages/babel-core/src/helpers/normalize-ast.js
index 50dd1aa321..dd295e6021 100644
--- a/packages/babel-core/src/helpers/normalize-ast.js
+++ b/packages/babel-core/src/helpers/normalize-ast.js
@@ -7,9 +7,13 @@ import * as t from "babel-types";
  */
 
 export default function (ast, comments, tokens) {
-  if (ast && ast.type === "Program") {
-    return t.file(ast, comments || [], tokens || []);
-  } else {
-    throw new Error("Not a valid ast?");
+  if (ast) {
+    if (ast.type === "Program") {
+      return t.file(ast, comments || [], tokens || []);
+    } else if (ast.type === "File") {
+      return ast;
+    }
   }
+
+  throw new Error("Not a valid ast?");
 }