Flutter app freezes after adding a breakpoint in VS Code #4926
Description
Describe the bug
Running an iOS or MacOS app from VSCode, as soon as I add a breakpoint the app freezes immediately. Not hot reload or hot restart is able to revive the app. Only stopping and starting again works.
To Reproduce
Steps to reproduce the behavior:
- Start debugging an iOS or MacOS Flutter app
- On VS Code, add a breakpoint at any line in your code
- App will freeze
Unfortunately I have noticed some intermittent behavior, but I'd say 90% of the times it freezes.
Expected behavior
App should not freeze.
Screenshots
If applicable, add screenshots to help explain your problem.
Please complete the following information:
You can run the Dart: Collect Diagnostic Information command from the VS Code command palette (F1) to easily capture this information or provide it manually.
Workspace Environment
Dart Code extension: 3.80.0
Flutter extension: 3.80.0 (activated)
App: Visual Studio Code
App Host: desktop
Version: mac 1.85.1
Workspace type: Dart, Flutter (LSP)
Dart (3.2.3): /Users/user/Development/flutter/bin/cache/dart-sdk
Flutter (3.16.5): /Users/user/Development/flutter (iPhone 15 (ios/ios))
Output from 'dart info'
/Users/user/Development/flutter/bin/cache/dart-sdk/bin/dart info
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General info
- Dart 3.2.3 (stable) (Tue Dec 5 17:58:33 2023 +0000) on "macos_arm64"
- on macos / Version 13.5.2 (Build 22G91)
- locale is en-US
Project info
- sdk constraint: '>=3.0.0 <4.0.0'
- dependencies: collection
- dev_dependencies: build_runner
- elided dependencies: 4
Process info
| Memory | CPU | Elapsed time | Command line |
|---|---|---|---|
| 10 MB | 0.0% | 21:53:49 | dart devtools --machine --allow-embedding |
| 448 MB | 0.0% | 21:53:49 | dart language-server --protocol=lsp --client-id=VS-Code --client-version=3.80.0 |
| 6 MB | 0.0% | 18:05:18 | dart run build_runner watch --delete-conflicting-outputs |
| 29 MB | 0.0% | 21:53:49 | flutter_tools.snapshot daemon |
| 105 MB | 0.0% | 04:04 | flutter_tools.snapshot debug_adapter |
| 158 MB | 2.1% | 04:04 | flutter_tools.snapshot run --machine --start-paused -d 00008130-000C75382E08001C --devtools-server-address http:/ --target /main.dart --device-timeout 10 |
| 509 MB | 0.0% | 03:50 | frontend_server.dart.snapshot --sdk-root / --incremental --target=flutter --experimental-emit-debug-metadata -DFLUTTER_WEB_AUTO_DETECT=true -DFLUTTER_WEB_CANVASKIT_URL=https:/ --output-dill /app.dill --packages /package_config.json -Ddart.vm.profile=false -Ddart.vm.product=false --enable-asserts --track-widget-creation --filesystem-scheme org-dartlang-root --initialize-from-dill build/dd704641fca0f13458e044aee43be5d8.cache.dill.track.dill --source file:/dart_plugin_registrant.dart --source package:flutter/dart_plugin_registrant.dart -Dflutter.dart_plugin_registrant=file:/dart_plugin_registrant.dart --verbosity=error --enable-experiment=alternative-invalidation-strategy |
Output from 'flutter doctor'
/Users/user/Development/flutter/bin/flutter doctor -v
[✓] Flutter (Channel stable, 3.16.5, on macOS 13.5.2 22G91 darwin-arm64, locale en-US)
• Flutter version 3.16.5 on channel stable at /Users/user/Development/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 78666c8dc5 (3 weeks ago), 2023-12-19 16:14:14 -0800
• Engine revision 3f3e560236
• Dart version 3.2.3
• DevTools version 2.28.4
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
• Android SDK at /Users/user/Library/Android/sdk
• Platform android-34, build-tools 34.0.0
• Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 15.0)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 15A240d
• CocoaPods version 1.13.0
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2022.2)
• 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 17.0.6+0-17.0.6b802.4-9586694)
[✓] VS Code (version 1.85.1)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.80.0
[✓] Network resources
• All expected network resources are available.
• No issues found!