From 2b9aaac2ff9868726e16f90b9de2af444ead230b Mon Sep 17 00:00:00 2001
From: Tadeu Zagallo <tadeuzagallo@fb.com>
Date: Sat, 18 Apr 2015 06:23:24 -0700
Subject: [PATCH] [ReactNative] Guard against blocks being added to UIManager
 during dealloc

---
 React/Modules/RCTUIManager.m | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/React/Modules/RCTUIManager.m b/React/Modules/RCTUIManager.m
index b6a350dcd..ae04f9a1d 100644
--- a/React/Modules/RCTUIManager.m
+++ b/React/Modules/RCTUIManager.m
@@ -398,13 +398,15 @@ static NSDictionary *RCTViewConfigForModule(Class managerClass, NSString *viewNa
 {
   RCTAssert(![NSThread isMainThread], @"This method should only be called on the shadow thread");
 
+  if (!self.isValid) {
+    return;
+  }
+
   __weak RCTUIManager *weakViewManager = self;
-  __weak RCTSparseArray *weakViewRegistry = _viewRegistry;
   dispatch_block_t outerBlock = ^{
     RCTUIManager *strongViewManager = weakViewManager;
-    RCTSparseArray *strongViewRegistry = weakViewRegistry;
-    if (strongViewManager && strongViewRegistry) {
-      block(strongViewManager, strongViewRegistry);
+    if (strongViewManager && strongViewManager.isValid) {
+      block(strongViewManager, strongViewManager->_viewRegistry);
     }
   };