ClipRSuperellipse causes app crash when wrapping WebView in iOS. #171966
Description
Steps to reproduce
- Create a Flutter app with webview_flutter dependency
- Wrap a WebViewWidget with ClipRSuperellipse
- Run the app
- App crashes immediately
Expected results
The WebView should render properly inside the ClipRSuperellipse container, similar to how it works with ClipRRect.
Actual results
The app crashes when ClipRSuperellipse wraps a WebView.
Code sample
Code sample
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: Text('ClipRSuperellipse + WebView Bug')),
body: Center(
child: SizedBox(
width: 300,
height: 400,
child: ClipRSuperellipse( // This causes crash
borderRadius: BorderRadius.circular(20),
clipBehavior: Clip.antiAlias,
child: WebViewWidget(
controller: WebViewController()
..loadRequest(Uri.parse('https://flutter.dev')),
),
),
),
),
),
);
}
}Working Alternative
// This works perfectly
ClipRRect(
borderRadius: BorderRadius.circular(20),
clipBehavior: Clip.antiAlias,
child: WebViewWidget(
controller: WebViewController()
..loadRequest(Uri.parse('https://flutter.dev')),
),
)Screenshots or Video
No response
Logs
No response
Flutter Doctor output
Doctor output
flutter doctor -v
[✓] Flutter (Channel stable, 3.32.6, on macOS 15.5 24F74 darwin-arm64, locale fr-US) [233ms]
• Flutter version 3.32.6 on channel stable at /Users/myuser/Flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 077b4a4ce1 (2 days ago), 2025-07-08 13:31:08 -0700
• Engine revision 72f2b18bb0
• Dart version 3.8.1
• DevTools version 2.45.1
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0) [1 051ms]
• Android SDK at /Users/myuser/Library/Android/sdk
• Platform android-35, build-tools 35.0.0
• Java binary at: /opt/homebrew/opt/openjdk@17/libexec/openjdk.jdk/Contents/Home/bin/java
This JDK is specified in your Flutter configuration.
To change the current JDK, run: `flutter config --jdk-dir="path/to/jdk"`.
• Java version OpenJDK Runtime Environment Homebrew (build 17.0.15+0)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 16.0) [630ms]
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 16A242d
• CocoaPods version 1.16.2
[✓] Chrome - develop for the web [9ms]
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2024.3) [9ms]
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 21.0.5+-13047016-b750.29)
[✓] VS Code (version 1.95.3) [8ms]
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.114.0
[✓] Connected device (3 available) [5,8s]
• iPhone 16 Pro (mobile) • 155EA5B7-6134-41C9-B90C-AAD7F7D0F1BF • ios •
com.apple.CoreSimulator.SimRuntime.iOS-18-2 (simulator)
• macOS (desktop) • macos • darwin-arm64 •
macOS 15.5 24F74 darwin-arm64
• Chrome (web) • chrome • web-javascript •
Google Chrome 137.0.7151.120
[✓] Network resources [366ms]
• All expected network resources are available.
• No issues found!