Guard against reused fibers in React Native commands (#21837)

Author: yungsters

packages/react-native-renderer/src/ReactFabric.js

@@ -160,16 +160,14 @@ 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);
   }
@@ -186,11 +184,11 @@ 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);
   }

packages/react-native-renderer/src/ReactNativeRenderer.js

@@ -160,12 +160,11 @@ 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);
   }
@@ -182,11 +181,11 @@ 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);
   }