From ae60caacfd7a6fd9f4ada943c7d04a782f1e9505 Mon Sep 17 00:00:00 2001
From: Joshua Gross <joshua.gross@gmail.com>
Date: Thu, 27 Feb 2020 17:23:25 -0800
Subject: [PATCH] [Fabric] Fix targetAsInstance dispatchEvent "cannot read
 property of null" (#18156)

* Fix Fabric targetAsInstance dispatchEvent: targetFiber stateNode is null in some cases

Co-authored-by: Dan Abramov <dan.abramov@gmail.com>
---
 .../react-native-renderer/src/ReactFabricEventEmitter.js    | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/react-native-renderer/src/ReactFabricEventEmitter.js b/packages/react-native-renderer/src/ReactFabricEventEmitter.js
index 959df5bc48732..49abda74eb362 100644
--- a/packages/react-native-renderer/src/ReactFabricEventEmitter.js
+++ b/packages/react-native-renderer/src/ReactFabricEventEmitter.js
@@ -87,7 +87,11 @@ export function dispatchEvent(
   let eventTarget = null;
   if (enableNativeTargetAsInstance) {
     if (targetFiber != null) {
-      eventTarget = targetFiber.stateNode.canonical;
+      const stateNode = targetFiber.stateNode;
+      // Guard against Fiber being unmounted
+      if (stateNode != null) {
+        eventTarget = stateNode.canonical;
+      }
     }
   } else {
     eventTarget = nativeEvent.target;