From 5a1984aa413b4776de92300c163372fbf873ad51 Mon Sep 17 00:00:00 2001
From: Daniel Tschinder <daniel@tschinder.de>
Date: Thu, 29 Sep 2016 14:14:39 +0200
Subject: [PATCH] make babel-helper-remap-async-to-generator bc with babel 6.15
 and lower (#4603)

---
 packages/babel-helper-remap-async-to-generator/src/index.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/babel-helper-remap-async-to-generator/src/index.js b/packages/babel-helper-remap-async-to-generator/src/index.js
index 00bccfa42b..64c2a47439 100644
--- a/packages/babel-helper-remap-async-to-generator/src/index.js
+++ b/packages/babel-helper-remap-async-to-generator/src/index.js
@@ -152,6 +152,11 @@ function plainFunction(path: NodePath, callId: Object) {
 }
 
 export default function (path: NodePath, file: Object, helpers: Object) {
+  if (!helpers) {
+    // bc for 6.15 and earlier
+    helpers = { wrapAsync: file };
+    file = null;
+  }
   path.traverse(awaitVisitor, {
     file,
     wrapAwait: helpers.wrapAwait