From 34a3274b6d83b660912deb5ae12f6bd7eb0d7214 Mon Sep 17 00:00:00 2001
From: Eli White <eliwhite@fb.com>
Date: Thu, 27 Feb 2020 19:36:13 -0800
Subject: [PATCH] Partial React Sync from 241c4467e...00d8e5b80

Summary:
- **[00d8e5b80](https://github.com/facebook/react/commit/00d8e5b80 )**: [Fabric] Fix targetAsInstance dispatchEvent "cannot read property of null" (#18156) //<Joshua Gross>//
- **[ad84625f8](https://github.com/facebook/react/commit/ad84625f8 )**: [Native] Migrate focus/blur to call TextInputState with the host component (#18068) //<Eli White>//
- **[edab5c074](https://github.com/facebook/react/commit/edab5c074 )**: Re-throw errors thrown by the renderer at the root in the complete phase (#18029) //<Andrew Clark>//
- **[a6dfe9aa4](https://github.com/facebook/react/commit/a6dfe9aa4 )**: [Native] Delete NativeComponent and NativeMethodsMixin (#18036) //<Eli White>//

Changelog:
[General][React] Partial React Sync from 241c4467e...00d8e5b80

Reviewed By: JoshuaGross

Differential Revision: D20153744

fbshipit-source-id: 09c5fec620370f1844a89af1c6ba2d487020216d
---
 Libraries/Renderer/implementations/ReactFabric-dev.fb.js | 6 +++++-
 Libraries/Renderer/implementations/ReactFabric-dev.js    | 6 +++++-
 .../Renderer/implementations/ReactFabric-prod.fb.js      | 9 ++++++---
 .../Renderer/implementations/ReactFabric-profiling.fb.js | 9 ++++++---
 4 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/Libraries/Renderer/implementations/ReactFabric-dev.fb.js b/Libraries/Renderer/implementations/ReactFabric-dev.fb.js
index 23f1d76c068131..2414df073f94fa 100644
--- a/Libraries/Renderer/implementations/ReactFabric-dev.fb.js
+++ b/Libraries/Renderer/implementations/ReactFabric-dev.fb.js
@@ -3828,7 +3828,11 @@ function dispatchEvent(target, topLevelType, nativeEvent) {
 
   if (enableNativeTargetAsInstance) {
     if (targetFiber != null) {
-      eventTarget = targetFiber.stateNode.canonical;
+      var stateNode = targetFiber.stateNode; // Guard against Fiber being unmounted
+
+      if (stateNode != null) {
+        eventTarget = stateNode.canonical;
+      }
     }
   } else {
     eventTarget = nativeEvent.target;
diff --git a/Libraries/Renderer/implementations/ReactFabric-dev.js b/Libraries/Renderer/implementations/ReactFabric-dev.js
index 91e18999b9e7b8..3c08d6152b9eba 100644
--- a/Libraries/Renderer/implementations/ReactFabric-dev.js
+++ b/Libraries/Renderer/implementations/ReactFabric-dev.js
@@ -3826,7 +3826,11 @@ function dispatchEvent(target, topLevelType, nativeEvent) {
 
   if (enableNativeTargetAsInstance) {
     if (targetFiber != null) {
-      eventTarget = targetFiber.stateNode.canonical;
+      var stateNode = targetFiber.stateNode; // Guard against Fiber being unmounted
+
+      if (stateNode != null) {
+        eventTarget = stateNode.canonical;
+      }
     }
   } else {
     eventTarget = nativeEvent.target;
diff --git a/Libraries/Renderer/implementations/ReactFabric-prod.fb.js b/Libraries/Renderer/implementations/ReactFabric-prod.fb.js
index 40fe137482624c..4d84a8cc658233 100644
--- a/Libraries/Renderer/implementations/ReactFabric-prod.fb.js
+++ b/Libraries/Renderer/implementations/ReactFabric-prod.fb.js
@@ -1467,9 +1467,12 @@ function batchedUpdates(fn, bookkeeping) {
 }
 function dispatchEvent(target, topLevelType, nativeEvent) {
   var eventTarget = null;
-  enableNativeTargetAsInstance
-    ? null != target && (eventTarget = target.stateNode.canonical)
-    : (eventTarget = nativeEvent.target);
+  if (enableNativeTargetAsInstance) {
+    if (null != target) {
+      var stateNode = target.stateNode;
+      null != stateNode && (eventTarget = stateNode.canonical);
+    }
+  } else eventTarget = nativeEvent.target;
   batchedUpdates(function() {
     var events = eventTarget;
     for (var events$jscomp$0 = null, i = 0; i < plugins.length; i++) {
diff --git a/Libraries/Renderer/implementations/ReactFabric-profiling.fb.js b/Libraries/Renderer/implementations/ReactFabric-profiling.fb.js
index 804b26e06cd2f8..5cbd41b7417129 100644
--- a/Libraries/Renderer/implementations/ReactFabric-profiling.fb.js
+++ b/Libraries/Renderer/implementations/ReactFabric-profiling.fb.js
@@ -1468,9 +1468,12 @@ function batchedUpdates(fn, bookkeeping) {
 }
 function dispatchEvent(target, topLevelType, nativeEvent) {
   var eventTarget = null;
-  enableNativeTargetAsInstance
-    ? null != target && (eventTarget = target.stateNode.canonical)
-    : (eventTarget = nativeEvent.target);
+  if (enableNativeTargetAsInstance) {
+    if (null != target) {
+      var stateNode = target.stateNode;
+      null != stateNode && (eventTarget = stateNode.canonical);
+    }
+  } else eventTarget = nativeEvent.target;
   batchedUpdates(function() {
     var events = eventTarget;
     for (var events$jscomp$0 = null, i = 0; i < plugins.length; i++) {