Cannot attach debugger

[Errichamonda]

Steps to Reproduce

I've already opened a issue on Flutter GitHub but they weren't very useful.
When I try to lauch my application in debug mode, it seems like lauching normally. The applicaion skips all the breakpoints without any error and the application doesn't wait for debugger.

Version info

Flutter doctor:

[√] Flutter (Channel beta, v0.10.2, on Microsoft Windows [Versione 10.0.17134.345], locale it-IT)
    • Flutter version 0.10.2 at C:\flutter
    • Framework revision d8cbb80206 (2 weeks ago), 2018-10-26 01:30:21 -0400
    • Engine revision 6c2ade9fa2
    • Dart version 2.1.0-dev.8.0.flutter-bf26f760b1

[√] Android toolchain - develop for Android devices (Android SDK 28.0.3)
    • Android SDK at C:\Users\strez\AppData\Local\Android\sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
    • All Android licenses accepted.

[√] Android Studio (version 3.2)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 30.0.1
    • Dart plugin version 181.5656
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[√] VS Code (version 1.28.2)
    • VS Code at C:\Users\strez\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 2.20.0

[√] Connected device (1 available)
    • ONEPLUS A6003 • a5e445e6 • android-arm64 • Android 9 (API 28)

Also Flutter Plugin version: 30.0.1

[jwren]

Does debugging work in the samples, but not your your own app?

If it is just your own app, have you happened to modify the main activity for Android? If for instance you modify the call to FlutterMain.ensureInitializationComplete in your Activity, see 1, to not pass the "--start-paused" Dart VM flag, then debugging won't work.

If this isn't it, the next step would be to go look in your IntelliJ logs to see if something is suspect.

[Errichamonda]

The debug works on other project.
In the MainActivity.java there is nothing except the usual super.onCreate and GeneratedPluginRegistrant.registerWith(this);

By the way the debugging stopped working in that particular project when I upgraded the flutter plugin from 29.* to 30.*

The debug seems to work only on the first subfolder of 'lib'. Going deeper it seems like the debugger can't see the breakpoints.

[devoncarew]

@Errichamonda, if you hot reload or restart your app, are breakpoints hit then? Have you modified the native code of the app, or just Flutter/Dart code?

Does this also repro if you create a new (default) Flutter project?

Thanks in advance for the answers!

[Errichamonda]

With flutter clean, hot reload or restart it doesn't hit breakpoints. I've modified only the Flutter Code. Nothing on Manifest, Gradle Settings or other Android folder.

With other project, like the default one that Android Studio creates, the breakpoints works. Only in this application. Probably because the file is nested inside folders.

[devoncarew]

Probably because the file is nested inside folders.

Ah! We may be having path issues. Is the app something you can share with us, or a minimal repro that has the same project structure?

[Errichamonda]

Hi, I've recreated the project with the minimum files to reproduce the problem. https://github.com/Errichamonda/DebuggerTest
I've added a breakpoint to the line 17 of lib/ui/main/gallery/main.dart

[devoncarew]

Thanks for the repro case!

I cloned it, added in some necessary iOS files, and opened it in IntelliJ (from the cli, via idea .).

I was able to set and hit breakpoints (in order around line 19 of the above file, and in the setState closure). I'm not sure what's going on in your case, but you may try re-creating the project and see if that helps.

[Errichamonda]

Oh well, I see now that GitHub removed something from the code, I tried with the breakpoint at line 13

[devoncarew]

OK, that breakpoint worked for me as well.

[spagni]

Hi @Errichamonda! Did you find any solution for this issue? I having the same problems where the breakpoints are not being hit. With other flutter projects it works fine. Is this only project that I can't debug

[VyasPrachi]

Hello,
Please give me any solution, My breakpoint is not hit in VS code and Android studio.