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Filled text field active indicator overflows container bounds #146507

@bleroux

Description

@bleroux

Steps to reproduce

  1. Run the code sample on mobile.
  2. Observe that the active indicator overflows the container height at the bottom (which is 56dp on mobile).

Expected results

Active indicator does not overflow container bounds.
Similarly to an outlined text field border which is painted correctly:

image

Actual results

The active indicator overflows the container at the bottom.

image

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(
      home: SafeArea(
        child: Scaffold(
          body: Padding(
            padding: const EdgeInsets.all(16.0),
            child: Column(
              children: [
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Container(
                      height: 56,
                      width: 30,
                      color: Colors.amber[700],
                      child: const Center(
                        child: Text('56dp', style: TextStyle(fontSize: 10, fontWeight: FontWeight.bold)),
                      ),
                    ),
                    const SizedBox(
                      width: 140,
                      child: TextField(
                        decoration: InputDecoration(
                          labelText: 'Label text',
                          filled: true,
                          // border: OutlineInputBorder(),
                        ),
                      ),
                    ),
                    Container(
                      height: 56,
                      width: 30,
                      color: Colors.amber[700],
                      child: const Center(
                        child: Text('56dp', style: TextStyle(fontSize: 10, fontWeight: FontWeight.bold)),
                      ),
                    ),
                  ],
                ),
                const SizedBox(height: 5),
                const Text(
                  'Active indicator painted\noutside container bounds.',
                  textAlign: TextAlign.center,
                  style: TextStyle(fontSize: 12),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

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Flutter Doctor output

Doctor output
[!] Flutter (Channel master, 3.22.0-6.0.pre.23, on macOS 14.2.1 23C71
    darwin-arm64, locale fr-FR)
    ! Warning: `flutter` on your path resolves to
      /Users/bruno/Nevercode/flutter/bin/flutter, which is not inside your
      current Flutter SDK checkout at /Users/Bruno/Nevercode/flutter. Consider
      adding /Users/Bruno/Nevercode/flutter/bin to the front of your path.
    ! Warning: `dart` on your path resolves to
      /opt/homebrew/Cellar/dart/2.18.4/libexec/bin/dart, which is not inside
      your current Flutter SDK checkout at /Users/Bruno/Nevercode/flutter.
      Consider adding /Users/Bruno/Nevercode/flutter/bin to the front of your
      path.
    ! Upstream repository https://github.com/NevercodeHQ/flutter is not a
      standard remote.
      Set environment variable "FLUTTER_GIT_URL" to
      https://github.com/NevercodeHQ/flutter to dismiss this error.
[!] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    ! Some Android licenses not accepted. To resolve this, run: flutter doctor
      --android-licenses
[!] Xcode - develop for iOS and macOS (Xcode 15.1)
    ! CocoaPods 1.11.3 out of date (1.13.0 is recommended).
        CocoaPods is used to retrieve the iOS and macOS platform side's plugin
        code that responds to your plugin usage on the Dart side.
        Without CocoaPods, plugins will not work on iOS or macOS.
        For more info, see https://flutter.dev/platform-plugins
      To upgrade see
      https://guides.cocoapods.org/using/getting-started.html#updating-cocoapods
      for instructions.
[✓] Chrome - develop for the web
[✓] Android Studio (version 2023.1)
[✓] VS Code (version 1.88.0)
[✓] Connected device (4 available)
[✓] Network resources

! Doctor found issues in 3 categories.

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P2Important issues not at the top of the work lista: text inputEntering text in a text field or keyboard related problemsf: material designflutter/packages/flutter/material repository.found in release: 3.22Found to occur in 3.22frameworkflutter/packages/flutter repository. See also f: labels.has reproducible stepsThe issue has been confirmed reproducible and is ready to work onr: fixedIssue is closed as already fixed in a newer versionteam-text-inputOwned by Text Input team

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