From 5e212327177ad16b1101a7bc80b52d68bd7bfcf6 Mon Sep 17 00:00:00 2001
From: David Vacca <dvacca@meta.com>
Date: Wed, 23 Oct 2024 22:53:44 -0700
Subject: [PATCH] Assert enableBridgelessArchitecture is true when starting
 Bridgeless (#47145)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/47145

Staring Bridgeless without previously setting ReactNativeFeatureFlags.enableBridgelessArchitecture() is UB, we should assert enableBridgelessArchitecture is true when starting Bridgeless

changelog: [internal] internal

Reviewed By: NickGerleman

Differential Revision: D64641081

fbshipit-source-id: d7964f8a9d5a2e6dad9d44b8fd5cd5a52d1b2cf4
---
 .../com/facebook/react/runtime/ReactHostImpl.java     | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/runtime/ReactHostImpl.java b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/runtime/ReactHostImpl.java
index a5732d3c893..b9fc10da9d0 100644
--- a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/runtime/ReactHostImpl.java
+++ b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/runtime/ReactHostImpl.java
@@ -923,6 +923,17 @@ public class ReactHostImpl implements ReactHost {
     final String method = "getOrCreateStartTask()";
     if (mStartTask == null) {
       log(method, "Schedule");
+      Assertions.assertCondition(
+          ReactNativeFeatureFlags.enableBridgelessArchitecture(),
+          "enableBridgelessArchitecture FeatureFlag must be set to start ReactNative.");
+
+      Assertions.assertCondition(
+          ReactNativeFeatureFlags.enableFabricRenderer(),
+          "enableFabricRenderer FeatureFlag must be set to start ReactNative.");
+
+      Assertions.assertCondition(
+          ReactNativeFeatureFlags.useTurboModules(),
+          "useTurboModules FeatureFlag must be set to start ReactNative.");
       mStartTask =
           waitThenCallGetOrCreateReactInstanceTask()
               .continueWithTask(