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[Android] App using background flutter engine closes when run in release mode #109248

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[Android] App using background flutter engine closes when run in release mode#109248
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P2Important issues not at the top of the work lista: releaseChallenges faced when attempting to productionize an appc: crashStack traces logged to the consolec: regressionIt was better in the past than it is nowengineflutter/engine related. See also e: labels.found in release: 3.1Found to occur in 3.1found in release: 3.3Found to occur in 3.3has reproducible stepsThe issue has been confirmed reproducible and is ready to work onplatform-androidAndroid applications specificallyr: fixedIssue is closed as already fixed in a newer version
@koga187

Description

@koga187
koga187
opened on Aug 9, 2022

I updated my flutter Beta from 3.1.0-9.0.pre to channel Beta 3.3+ and suddenly my app is crashing when using isolates.

Steps to Reproduce

Clone the example app below:
https://github.com/fluttercommunity/flutter_downloader

And run it on release mode
Click to download anything.

Flutter doctor:

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel unknown, 3.1.0-9.0.pre, on macOS 12.5 21G72 darwin-x64, locale en-BR)
[✓] Android toolchain - develop for Android devices (Android SDK version 32.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 13.4.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2021.2)
[✓] VS Code (version 1.70.0)
[✓] Connected device (3 available)
[✓] HTTP Host Availability

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    P2Important issues not at the top of the work lista: releaseChallenges faced when attempting to productionize an appc: crashStack traces logged to the consolec: regressionIt was better in the past than it is nowengineflutter/engine related. See also e: labels.found in release: 3.1Found to occur in 3.1found in release: 3.3Found to occur in 3.3has reproducible stepsThe issue has been confirmed reproducible and is ready to work onplatform-androidAndroid applications specificallyr: fixedIssue is closed as already fixed in a newer version

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