From db13cbfa0683570a55e2461ff0006a8c35eebbed Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Wed, 29 Jul 2015 04:16:57 +0100
Subject: [PATCH] don't throw error on locationless illegal export name

---
 packages/babel/src/transformation/modules/_default.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/babel/src/transformation/modules/_default.js b/packages/babel/src/transformation/modules/_default.js
index 940e10e3ef..03bc6a7857 100644
--- a/packages/babel/src/transformation/modules/_default.js
+++ b/packages/babel/src/transformation/modules/_default.js
@@ -419,7 +419,7 @@ export default class DefaultFormatter {
    */
 
   checkExportIdentifier(node) {
-    if (t.isIdentifier(node, { name: "__esModule" })) {
+    if (node.loc && t.isIdentifier(node, { name: "__esModule" })) {
       throw this.file.errorWithNode(node, messages.get("modulesIllegalExportName", node.name));
     }
   }