Dart-code: Strange behavior in profile mode

[Goolpe]

If I run profile mode with launch.json sometimes the app gets stuck on the splash screen with these dependencies.
flutter run --profile works fine

launch.json

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Flutter (Profile)",
            "request": "launch",
            "type": "dart",
            "flutterMode": "profile"
        }
    ]
}

Dependencies

dependencies:
  flutter:
    sdk: flutter
  flutter_secure_storage: ^3.3.3
  yandex_mapkit: ^0.3.9

Steps to Reproduce

1. flutter create app
2. add launch.json, dependencies
3. update minSdkVersion: 18
4. start debugging (F5)

flutter doctor -v

[✓] Flutter (Channel beta, 1.19.0-4.2.pre, on Linux, locale ru_RU.UTF-8)
    • Flutter version 1.19.0-4.2.pre at /home/ads/flutter
    • Framework revision 9b9b543d92 (4 дня назад), 2020-06-22 12:19:28 -0700
    • Engine revision 9a28c3bcf4
    • Dart version 2.9.0 (build 2.9.0-14.1.beta)


[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /home/ads/Android/Sdk
    • Platform android-29, build-tools 29.0.3
    • Java binary at: /snap/android-studio/84/android-studio/jre/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at google-chrome

[✓] Android Studio (version 3.6)
    • Android Studio at /snap/android-studio/84/android-studio
    • Flutter plugin version 44.0.2
    • Dart plugin version 192.7761
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)

[✓] IntelliJ IDEA Community Edition (version 2019.3)
    • IntelliJ at /home/ads/idea
    • Flutter plugin version 44.0.3
    • Dart plugin version 193.6911.25

[✓] VS Code (version 1.42.1)
    • VS Code at /usr/share/code
    • Flutter extension version 3.8.1

[✓] Connected device (3 available)
    • ZTE BLADE A0622 • 320376181424 • android-arm    • Android 7.1.1 (API 25)
    • Web Server      • web-server   • web-javascript • Flutter Tools
    • Chrome          • chrome       • web-javascript • Google Chrome 80.0.3987.116

• No issues found!

console logs

Running "flutter pub get" in example...                             0,4s
Launching lib/main.dart on ZTE BLADE A0622 in profile mode...
✓ Built build/app/outputs/flutter-apk/app-profile.apk (56.5MB).
Installing build/app/outputs/flutter-apk/app.apk...                12,4s
W/yandex.maps(28793): yandex::maps::runtime::locale::internal::detectCountry: Empty operatorInfo!
W/FlutterActivity(28793): Tried to automatically register plugins with FlutterEngine (io.flutter.embedding.engine.FlutterEngine@f5bd25e) but could not find and invoke the GeneratedPluginRegistrant.
W/yandex.maps(28793): yandex::maps::runtime::locale::internal::detectCountry: Empty operatorInfo!
I/OpenGLRenderer(28793): Initialized EGL, version 1.4
D/OpenGLRenderer(28793): Swap behavior 1
V/BoostFramework(31722): mAcquireFunc method = public int com.qualcomm.qti.Performance.perfLockAcquire(int,int[])
V/BoostFramework(31722): mReleaseFunc method = public int com.qualcomm.qti.Performance.perfLockRelease()
V/BoostFramework(31722): mAcquireTouchFunc method = public int com.qualcomm.qti.Performance.perfLockAcquireTouch(android.view.MotionEvent,android.util.DisplayMetrics,int,int[])
V/BoostFramework(31722): mIOPStart method = public int com.qualcomm.qti.Performance.perfIOPrefetchStart(int,java.lang.String)
V/BoostFramework(31722): mIOPStop method = public int com.qualcomm.qti.Performance.perfIOPrefetchStop()
V/BoostFramework(31722): BoostFramework() : mPerf = com.qualcomm.qti.Performance@cf8f0e

[DanTup]

Could you try capturing a verbose log?

• Run the Dart: Capture Logs command
• Untick Analysis Server but leave everything else ticked and click OK
• Run the app, reproducing the issue (leave the log running for around 60 seconds after it seems to get stuck, just in case anything is still happening so the log doesn't get cut short)
• Click Cancel on the logging dialog to stop logging and open the log
• Provide the log here

Also - can you reproduce from an empty project (created with Flutter: New Project, adding the dependencies) or only a specific project?

[Goolpe]

Created an empty project with dependencies - the problem still exists
Dart-Code-Log.txt

[DanTup]

Thanks! I was able to repro this (sometimes). It was a race condition in the debugger connection code. If the thread was in the PauseStart state when we first found it, everything worked fine. However if it was in the None state initially, and changed to PauseStart before we'd finished the rest of the startup code, the event would be dropped.

To fix it, any incoming events wait for the initialisation to complete before being processed.

If all the tests pass, I'll make a debug build for you to try out for a while before merging it.

[Goolpe]

Ok, thanks!

[DanTup]

Please try out the build here:

https://github.com/Dart-Code/Dart-Code/releases/tag/v3.13.0-alpha.1

It should solve this issue. It's safe to stick on that version if it works - when v3.13 release stable, you'll be automatically upgraded back to the stable versions.

If you still see the issue (or notice any new issues that may be caused by the fix), please let me know!

[Goolpe]

Works great! Thanks!

[DanTup]

Great! The next planned release will be around the end of the month, so you should stick on this version until then (and if anything comes up in the meantime, let me know so we can address it before releasing). Thanks!