From b2574189588d9e776c3e1baabc5596b3bc20a1df Mon Sep 17 00:00:00 2001
From: Emiel Mols <emiel.mols@gmail.com>
Date: Fri, 7 Apr 2017 10:39:28 +0200
Subject: [PATCH] packager: bust cached babelrc if projectRoots change

---
 packager/transformer.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packager/transformer.js b/packager/transformer.js
index 88e22d52d967d6..c6021baaacb9e8 100644
--- a/packager/transformer.js
+++ b/packager/transformer.js
@@ -29,12 +29,14 @@ const {compactMapping} = require('./src/Bundler/source-map');
  */
 const getBabelRC = (function() {
   let babelRC = null;
+  let pr = null;
 
   return function _getBabelRC(projectRoots) {
-    if (babelRC !== null) {
+    if (babelRC !== null && pr === projectRoots) {
       return babelRC;
     }
 
+    pr = projectRoots;
     babelRC = {plugins: []}; // empty babelrc
 
     // Let's look for the .babelrc in the first project root.