From 4f69474e03bbc5fe8f4282a4790677779dec4a31 Mon Sep 17 00:00:00 2001
From: Brian Vaughn <brian.david.vaughn@gmail.com>
Date: Thu, 30 Mar 2017 15:45:13 -0700
Subject: [PATCH] Added explicit null return to completeUnitOfWork() to resolve
 Flow error (#9299)

---
 src/renderers/shared/fiber/ReactFiberScheduler.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/renderers/shared/fiber/ReactFiberScheduler.js b/src/renderers/shared/fiber/ReactFiberScheduler.js
index 29b74134ec..435fe52a6e 100644
--- a/src/renderers/shared/fiber/ReactFiberScheduler.js
+++ b/src/renderers/shared/fiber/ReactFiberScheduler.js
@@ -684,6 +684,10 @@ module.exports = function<T, P, I, TI, PI, C, CX, PL>(
         return null;
       }
     }
+
+    // Without this explicit null return Flow complains of invalid return type
+    // TODO Remove the above while(true) loop
+    return null;
   }
 
   function performUnitOfWork(workInProgress: Fiber): Fiber | null {