App crashes on closing child window when using window_manager (windows 10)

[sleddev]

Whenever I try to use the window_manager package, the app crashes as soon as I try to interact with the main window after closing a child window. Both in debug and release mode.

I'm using Flutter 3.3.8 stable.

I attached the minimal code to reproduce: window_manager_crash.zip

[damywise]

Maybe take a look at https://github.com/Kingtous/rustdesk_desktop_multi_window

[sleddev]

I just tried it with my attached example, and it crashed exactly the same.

[damywise]

not sure what you mean by tried it, maybe look at the example and see how they used it

[sleddev]

Both the desktop_multi_window and rustsesk_desktop_multi_window plugins' examples crash after I click on the create a new world button

[damywise]

weird, mine works perfectly

[sleddev]

I'll have to try it on another system or a VM then, but I can't do that until probably a few weeks.

[sleddev]

Can I ask what version of Flutter are you using?

[damywise]

Flutter 3.3.9

[SiongSng]

I successfully reproduced this problem using Flutter 3.7.0-1.1.pre (beta) test OS: Windows 11

[SiongSng]

But if you don't use the window_manager package, it can work normally

[rashcroft7]

I am having the same issue as @CroatianHusky. Do we need to do any plugin cleanup in FlutterWindow::OnDestroy?

Flutter 3.7.0-19.0.pre, on Microsoft Windows [Version 10.0.19045.2486]

[jijibong]

I am having the same issue as @CroatianHusky. Do we need to do any plugin cleanup in FlutterWindow::OnDestroy?

Flutter 3.7.0-19.0.pre, on Microsoft Windows [Version 10.0.19045.2486]

you can close child window by windowManager.destroy()

[annd22]

I used the windowManager.destroy() to close the sub window, but it still make the main window crash, so now I currently just hide the sub window, not close it, everything goes on.

[rashcroft7]

For those still having trouble, I am no longer getting errors using rustdesk_window_manager with rustdesk_desktop_multi_window

  window_manager:
        git:
            url: https://github.com/Kingtous/rustdesk_window_manager
            ref: 32b24c66151b72bba033ef8b954486aa9351d97b

  desktop_multi_window:
    git:
        url: https://github.com/Kingtous/rustdesk_desktop_multi_window
        ref: bc8604a88e52b2b6e64d2661ae49a71450a47af8

[LucaCoduriV]

@rashcroft7 All you need to do is import those packages ? Do you know if you can change the transparency of new window ?

[rashcroft7]

@LucaCoduriV Yes, and follow the example usage at rustdesk_desktop_multi_window. You will need to look at how the sub window is closed in the main.dart.

I have not tried transparency.

[LucaCoduriV]

@LucaCoduriV Yes, and follow the example usage at rustdesk_desktop_multi_window. You will need to look at how the sub window is closed in the main.dart.

I have not tried transparency.

I am looking at their code, but I Don't understand where I have to look. Sometime my program randomly crashes when opening a window after closing an other one and says that I am trying to read a Null pointer. And by the way, I can confirm that transparency works.

[abldabl]

I have the sameee. did you solve it?

@LucaCoduriV Yes, and follow the example usage at rustdesk_desktop_multi_window. You will need to look at how the sub window is closed in the main.dart. I have not tried transparency.

I am looking at their code, but I Don't understand where I have to look. Sometime my program randomly crashes when opening a window after closing an other one and says that I am trying to read a Null pointer. And by the way, I can confirm that transparency works.

[LucaCoduriV]

I have the sameee. did you solve it?

I am looking at their code, but I Don't understand where I have to look. Sometime my program randomly crashes when opening a window after closing an other one and says that I am trying to read a Null pointer. And by the way, I can confirm that transparency works.

No I didn't but i found a solution for my use case. I've created a pool of windows and hide them all by default. Then when I need, I change the content and show them up. And by the way, I am using the officials packages again.