[Fabric] Fix crash when running inspect (#13592)

acoates-ms · web-flow · commit a9e5ef1a7725 · 2024-08-20T15:36:08.000Z
* [Fabric] Fix crash when running inspect

* Change files

* fix
diff --git a/change/react-native-windows-061e13a1-aed7-4c50-b382-f49b0863935b.json b/change/react-native-windows-061e13a1-aed7-4c50-b382-f49b0863935b.json
@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "[Fabric] Fix crash when running inspect",
+  "packageName": "react-native-windows",
+  "email": "30809111+acoates-ms@users.noreply.github.com",
+  "dependentChangeType": "patch"
+}
diff --git a/vnext/Microsoft.ReactNative/Fabric/Composition/UiaHelpers.cpp b/vnext/Microsoft.ReactNative/Fabric/Composition/UiaHelpers.cpp
@@ -72,9 +72,10 @@ HRESULT UiaNavigateHelper(
       auto parentCV = view.Parent().as<winrt::Microsoft::ReactNative::Composition::implementation::ComponentView>();
       if (parentCV != nullptr) {
         auto children = parentCV->Children();
-        for (auto it = children.end(); it != children.begin(); --it) {
-          if (*it == view) {
-            uiaProvider = (*it)
+        for (auto i = children.Size() - 1; i > 0; i--) {
+          auto child = children.GetAt(i);
+          if (child == view) {
+            uiaProvider = children.GetAt(i - 1)
                               .as<winrt::Microsoft::ReactNative::Composition::implementation::ComponentView>()
                               ->EnsureUiaProvider();
             break;
