From faa9adf2ab77e04f78568129e8811491cd1896a4 Mon Sep 17 00:00:00 2001
From: David Aurelio <davidaurelio@fb.com>
Date: Thu, 21 Apr 2016 06:48:27 -0700
Subject: [PATCH] Allow for falsy module exports

Reviewed By: javache

Differential Revision: D3207353

fb-gh-sync-id: 3e23eb9cc9facea7993ce684f87ff4b7b0003a1c
fbshipit-source-id: 3e23eb9cc9facea7993ce684f87ff4b7b0003a1c
---
 react-packager/src/Resolver/polyfills/require-unbundle.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/react-packager/src/Resolver/polyfills/require-unbundle.js b/react-packager/src/Resolver/polyfills/require-unbundle.js
index c2cddad6..70cd1139 100644
--- a/react-packager/src/Resolver/polyfills/require-unbundle.js
+++ b/react-packager/src/Resolver/polyfills/require-unbundle.js
@@ -27,13 +27,16 @@ function define(moduleId, factory) {
   modules[moduleId] = {
     factory,
     hasError: false,
+    isInitialized: false,
     exports: undefined,
   };
 }
 
 function require(moduleId) {
   const module = modules[moduleId];
-  return module && module.exports || loadModule(moduleId, module);
+  return module && module.isInitialized
+    ? module.exports
+    : loadModule(moduleId, module);
 }
 
 function guardedLoadModule(moduleId, module) {
@@ -68,6 +71,7 @@ function loadModuleImplementation(moduleId, module) {
   }
 
   const exports = module.exports = {};
+  module.isInitialized = true;
   const {factory} = module;
   try {
     if (__DEV__) {
@@ -83,6 +87,7 @@ function loadModuleImplementation(moduleId, module) {
     }
     return (module.exports = moduleObject.exports);
   } catch (e) {
+    module.isInitialized = false;
     module.hasError = true;
     module.exports = undefined;
   }