RoundedSuperellipseBorder rendering bug on Android/iOS #170593
Description
Steps to reproduce
Run this example.
Borders are drawn outside the render box.
See the screenshot below.
Tested on Flutter 3.32.1, 3.32.2, 3.32.3, 3.32.4.
Happens on Android/iOS. Web is okay.
Expected results
Borders are drawn correctly.
Actual results
Borders are drawn incorrectly.
Code sample
Code sample
import 'package:flutter/material.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'RoundedSuperellipseBorder Demo',
home: const MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
const MyHomePage({super.key});
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Container(
height: 120,
margin: EdgeInsets.fromLTRB(32, 32, 32, 32),
width: double.infinity,
padding: const EdgeInsets.fromLTRB(16, 12, 16, 12),
decoration: ShapeDecoration(
color: Colors.grey,
shape: RoundedSuperellipseBorder(
side: const BorderSide(color: Colors.red, width: 4.0),
borderRadius: BorderRadius.only(
topLeft: const Radius.circular(16),
topRight: const Radius.circular(16),
bottomLeft: Radius.zero,
bottomRight: Radius.zero,
),
),
),
),
),
);
}
}Screenshots or Video
Screenshots / Video demonstration
Logs
No response
Flutter Doctor output
[✓] Flutter (Channel stable, 3.32.4, on macOS 15.5 24F74 darwin-arm64, locale en-KR) [420ms]
• Flutter version 3.32.4 on channel stable at /Users/minseokkang/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 6fba2447e9 (14 hours ago), 2025-06-12 19:03:56 -0700
• Engine revision 8cd19e509d
• Dart version 3.8.1
• DevTools version 2.45.1
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.1) [1,898ms]
• Android SDK at /Users/minseokkang/Library/Android/sdk
• Platform android-35, build-tools 35.0.1
• Java binary at: /Users/minseokkang/Library/Java/JavaVirtualMachines/corretto-19.0.2/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 Corretto-19.0.2.7.1 (build 19.0.2+7-FR)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 16.3) [1,106ms]
• Xcode at /Applications/Xcode-16.3.0.app/Contents/Developer
• Build 16E140
• CocoaPods version 1.16.2
[✓] Chrome - develop for the web [11ms]
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2024.2) [11ms]
• 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 21.0.4+-12422083-b607.1)
[✓] VS Code (version 1.100.2) [9ms]
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.112.0
[✓] Connected device (3 available) [6.1s]
• iPhone 16 Pro (mobile) • 080FD2A1-2DEB-4B22-B63B-813177F6E66C • 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
137.0.7151.104
! Error: Browsing on the local area network for Minseok. Ensure the device is unlocked and attached with a
cable or associated with the same local area network as this Mac.
The device must be opted into Developer Mode to connect wirelessly. (code -27)
[✓] Network resources [1,102ms]
• All expected network resources are available.
• No issues found!
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Important issues not at the top of the work listUI glitches reported at the engine/skia or impeller rendering levelflutter/engine related. See also e: labels.flutter/packages/flutter/material repository.Found to occur in 3.32Found to occur in 3.33flutter/packages/flutter repository. See also f: labels.The issue has been confirmed reproducible and is ready to work onIssue is closed as already fixed in a newer versionOwned by Engine teamTriaged by Engine team