Duplicate breadcrumbs in transaction event

[Maatteogekko]

Platform:

• Dart
• Flutter Android or iOS
• Flutter Web

IDE:

• VSCode
• IntelliJ/AS
• XCode
• Other, which one?

split-debug-info and obfuscate (Flutter Android or iOS) or CanvasKit (Flutter Web):

• Enabled
• Disabled

Platform installed with:

• pub.dev
• GitHub

Output of the command flutter doctor -v below:

[✓] Flutter (Channel stable, 3.7.7, on macOS 13.2.1 22D68 darwin-arm64, locale en-IT)
    • Flutter version 3.7.7 on channel stable at /Users/gekko/fvm/versions/stable
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 2ad6cd72c0 (2 weeks ago), 2023-03-08 09:41:59 -0800
    • Engine revision 1837b5be5f
    • Dart version 2.19.4
    • DevTools version 2.20.1

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
    • Android SDK at /Users/gekko/Library/Android/sdk
    • Platform android-33, build-tools 33.0.1
    • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 14C18
    • CocoaPods version 1.12.0

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2021.3)
    • 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 11.0.13+0-b1751.21-8125866)

[✓] VS Code (version 1.76.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.60.0

[✓] Connected device (4 available)
    • sdk gphone arm64 (mobile)  • emulator-5554                        • android-arm64  • Android 11 (API 30) (emulator)
    • iPhone 14 Pro Max (mobile) • 54BE6178-C130-4FDD-BD57-5F0121018953 • ios            • com.apple.CoreSimulator.SimRuntime.iOS-16-2 (simulator)
    • macOS (desktop)            • macos                                • darwin-arm64   • macOS 13.2.1 22D68 darwin-arm64
    • Chrome (web)               • chrome                               • web-javascript • Google Chrome 111.0.5563.110

[✓] HTTP Host Availability
    • All required HTTP hosts are available

• No issues found!

The version of the SDK (See pubspec.lock):
7.2.0

---

I have the following issue:

I am using a transaction in an onTap callback in the following way:

() async {
  final transaction = Sentry.getSpan()?.startChild(name) ??
      Sentry.startTransaction(
        name,
        operation,
        customSamplingContext: data,
        bindToScope: true,
      );

  await Future.delayed(const Duration(seconds: 2), transaction.finish);
}

When I go to inspect the transaction event on the dashboard I see duplicated breadcrumbs. This only happens for transaction events, normal issues are OK. This happens only on Android (tested on iOS simulator and Android emulator).

Checking the transaction in the beforeSendTransaction callback I don't see duplicated breadcrumbs, so I guess the issue is on the native SDK side? Turning on debug logs I see that the envelope sen to the server already contains duplicated breadcrumbs.

Steps to reproduce:

• generate some breadcrumbs
• start a transaction and finish it after some time
• check on sentry's dashboard (or debug logs) the breadcrumbs reported for the transaction's event

Actual result:

• I see duplicated breadcrumbs on sentry's dashboard (or debug logs)

Expected result:

• I don't see the duplicated breadcrumbs on the dashboard (and the logs)

[marandaneto]

Thanks for reporting @Maatteogekko we'll check it.
@denrase can you take a look since you did a fix related to that?

[denrase]

Thx @Maatteogekko, i will check this out.