From 22448283076530783576a938896be1a4b363724d Mon Sep 17 00:00:00 2001
From: Tim Yung <yungsters@fb.com>
Date: Thu, 8 Jul 2021 13:28:47 -0700
Subject: [PATCH] Guard against reused fibers in React Native commands

---
 .../react-native-renderer/src/ReactFabric.js  | 22 +++++++++----------
 .../src/ReactNativeRenderer.js                | 21 +++++++++---------
 2 files changed, 20 insertions(+), 23 deletions(-)

diff --git a/packages/react-native-renderer/src/ReactFabric.js b/packages/react-native-renderer/src/ReactFabric.js
index 040e02e093e47..bc0ffc92ea9f4 100644
--- a/packages/react-native-renderer/src/ReactFabric.js
+++ b/packages/react-native-renderer/src/ReactFabric.js
@@ -161,16 +161,14 @@ function dispatchCommand(handle: any, command: string, args: Array<any>) {
           'native component. Use React.forwardRef to get access to the underlying native component',
       );
     }
-
     return;
   }
 
-  if (handle._internalInstanceHandle) {
-    nativeFabricUIManager.dispatchCommand(
-      handle._internalInstanceHandle.stateNode.node,
-      command,
-      args,
-    );
+  if (handle._internalInstanceHandle != null) {
+    const {stateNode} = handle._internalInstanceHandle;
+    if (stateNode != null) {
+      nativeFabricUIManager.dispatchCommand(stateNode.node, command, args);
+    }
   } else {
     UIManager.dispatchViewManagerCommand(handle._nativeTag, command, args);
   }
@@ -187,11 +185,11 @@ function sendAccessibilityEvent(handle: any, eventType: string) {
     return;
   }
 
-  if (handle._internalInstanceHandle) {
-    nativeFabricUIManager.sendAccessibilityEvent(
-      handle._internalInstanceHandle.stateNode.node,
-      eventType,
-    );
+  if (handle._internalInstanceHandle != null) {
+    const {stateNode} = handle._internalInstanceHandle;
+    if (stateNode != null) {
+      nativeFabricUIManager.sendAccessibilityEvent(stateNode.node, eventType);
+    }
   } else {
     legacySendAccessibilityEvent(handle._nativeTag, eventType);
   }
diff --git a/packages/react-native-renderer/src/ReactNativeRenderer.js b/packages/react-native-renderer/src/ReactNativeRenderer.js
index 6f12fd5d8d445..8227c5eee01cf 100644
--- a/packages/react-native-renderer/src/ReactNativeRenderer.js
+++ b/packages/react-native-renderer/src/ReactNativeRenderer.js
@@ -161,12 +161,11 @@ function dispatchCommand(handle: any, command: string, args: Array<any>) {
     return;
   }
 
-  if (handle._internalInstanceHandle) {
-    nativeFabricUIManager.dispatchCommand(
-      handle._internalInstanceHandle.stateNode.node,
-      command,
-      args,
-    );
+  if (handle._internalInstanceHandle != null) {
+    const {stateNode} = handle._internalInstanceHandle;
+    if (stateNode != null) {
+      nativeFabricUIManager.dispatchCommand(stateNode.node, command, args);
+    }
   } else {
     UIManager.dispatchViewManagerCommand(handle._nativeTag, command, args);
   }
@@ -183,11 +182,11 @@ function sendAccessibilityEvent(handle: any, eventType: string) {
     return;
   }
 
-  if (handle._internalInstanceHandle) {
-    nativeFabricUIManager.sendAccessibilityEvent(
-      handle._internalInstanceHandle.stateNode.node,
-      eventType,
-    );
+  if (handle._internalInstanceHandle != null) {
+    const {stateNode} = handle._internalInstanceHandle;
+    if (stateNode != null) {
+      nativeFabricUIManager.sendAccessibilityEvent(stateNode.node, eventType);
+    }
   } else {
     legacySendAccessibilityEvent(handle._nativeTag, eventType);
   }