From 7aed1fe6a08425ec3370cb14f653544b97f4db10 Mon Sep 17 00:00:00 2001
From: David Vacca <dvacca@meta.com>
Date: Thu, 10 Apr 2025 17:57:13 -0700
Subject: [PATCH] Ensure interop is disabled when
 ReactBuildConfig.UNSTABLE_ENABLE_MINIFY_LEGACY_ARCHITECTURE == true (#50604)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/50604

ReactBuildConfig.UNSTABLE_ENABLE_MINIFY_LEGACY_ARCHITECTURE asume Fabric and TurboModule interops are disabled, in this diff I'm adding an assertion to validate this at runtime

changelog: [internal] internal

Reviewed By: mlord93

Differential Revision: D71854550

fbshipit-source-id: a4b3acfe4c3227115300b100be4d6222d5eace8e
---
 .../java/com/facebook/react/runtime/ReactHostImpl.java | 10 ++++++++++
 1 file changed, 10 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 5646b516fb4..f230b6ffccc 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
@@ -983,6 +983,16 @@ public class ReactHostImpl implements ReactHost {
             ReactNativeFeatureFlags.useTurboModules(),
             "useTurboModules FeatureFlag must be set to start ReactNative.");
       }
+      if (ReactBuildConfig.UNSTABLE_ENABLE_MINIFY_LEGACY_ARCHITECTURE) {
+        Assertions.assertCondition(
+            !ReactNativeFeatureFlags.useFabricInterop(),
+            "useFabricInterop FeatureFlag must be false when"
+                + " UNSTABLE_ENABLE_MINIFY_LEGACY_ARCHITECTURE == true.");
+        Assertions.assertCondition(
+            !ReactNativeFeatureFlags.useTurboModuleInterop(),
+            "useTurboModuleInterop FeatureFlag must be false when"
+                + " UNSTABLE_ENABLE_MINIFY_LEGACY_ARCHITECTURE == true.");
+      }
       mStartTask =
           waitThenCallGetOrCreateReactInstanceTask()
               .continueWithTask(