The program for Windows runs only once

[AlexSensey]

Hello
I decided to import the program for Windows, but a problem arose.
The same problem with a new project that I create from scratch.

For me, after the build, the project from the folder (exe file) is launched only the first time. It does not start the next time, but there are processes in the task manager.
exe debug file runs without problems. Created other projects from scratch, same problem.
I tried to run it on other computers, and there, too, only the first run, then everything. After renaming the folder, it starts again and also once.

[AlexSensey]

And in general, it works somehow strangely, if you close it and wait, the program may start, sometimes it may not. Or it may not start but be in processes, and the other instance will start normally, and there may be several instances in the process.

[codespearhead]

What's the output of flutter doctor?

What Windows version are you running?

[AlexSensey]

flutter doctor -v

Hi
The program starts, just in the release the window is not displayed and there are no errors. In debugging everything works fine. And this is on all applications, even on new ones.

[AlexSensey]

Added a line of code for debugging in the release - file win32_window.cpp
MessageBox(NULL, L"Window ok", L"Title", MB_ICONINFORMATION);

everything starts without problems, only before starting each time a window appears with a message

HWND window = CreateWindow(
window_class, title.c_str(), WS_OVERLAPPEDWINDOW,
Scale(origin.x, scale_factor), Scale(origin.y, scale_factor),
Scale(size.width, scale_factor), Scale(size.height, scale_factor),
nullptr, nullptr, GetModuleHandle(nullptr), this);

if (!window) {
return false;
}
MessageBox(NULL, L"Window ok", L"Title", MB_ICONINFORMATION);

UpdateTheme(window);

return OnCreate();
}

[AlexSensey]

The flutter_window.cpp file does not always work

flutter_controller_->engine()->SetNextFrameCallback(& {
this->Show();
});

I still don't understand why

if called simply
this->Show();
without using SetNextFrameCallback
then everything works

[exaby73]

Triage report

I can reproduce this issue on Master (3.7.0-30.0.pre.7). Once you close the window, there still seems to be an open process in Task Manager. Manually ending the task doesn't solve the issue of the programming not opening again.

flutter doctor -v (Master)

[!] Flutter (Channel master, 3.7.0-30.0.pre.7, on Microsoft Windows [Version 10.0.22621.1105], locale en-US)
    • Flutter version 3.7.0-30.0.pre.7 on channel master at C:\Users\Nabeel\fvm\versions\master
    ! The flutter binary is not on your path. Consider adding C:\Users\Nabeel\fvm\versions\master\bin to your path.
    ! Warning: `dart` on your path resolves to C:\tools\dart-sdk\bin\dart.exe, which is not inside your current Flutter SDK checkout at C:\Users\Nabeel\fvm\versions\master. Consider adding C:\Users\Nabeel\fvm\versions\master\bin to the front of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 15cd00f1ed (6 hours ago), 2023-01-29 21:58:05 -0500
    • Engine revision a7bb0e4108
    • Dart version 3.0.0 (build 3.0.0-179.0.dev)
    • DevTools version 2.20.1
    • If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.

[✓] Windows Version (Installed version of Windows is version 10 or higher)

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
    • Android SDK at C:\android-sdk
    • Platform android-33, build-tools 33.0.0
    • Java binary at: C:\Users\Nabeel\AppData\Local\JetBrains\Toolbox\apps\AndroidStudio\ch-0\213.7172.25.2113.9014738\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • CHROME_EXECUTABLE = C:\Program Files\BraveSoftware\Brave-Browser\Application\brave.exe

[✓] Visual Studio - develop for Windows (Visual Studio Community 2022 17.4.2)
    • Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
    • Visual Studio Community 2022 version 17.4.33122.133
    • Windows 10 SDK version 10.0.22621.0

[✓] Android Studio (version 2021.3)
    • Android Studio at C:\Users\Nabeel\AppData\Local\JetBrains\Toolbox\apps\AndroidStudio\ch-0\213.7172.25.2113.9014738
    • Flutter plugin version 70.2.3
    • Dart plugin version 213.7433
    • Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)

[✓] VS Code (version 1.74.3)
    • VS Code at C:\Users\Nabeel\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.46.0

[✓] VS Code (version 1.73.0-insider)
    • VS Code at C:\Users\Nabeel\AppData\Local\Programs\Microsoft VS Code Insiders
    • Flutter extension version 3.50.0

[✓] Connected device (3 available)
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [Version 10.0.22621.1105]
    • Chrome (web)      • chrome  • web-javascript • unknown
    • Edge (web)        • edge    • web-javascript • Microsoft Edge 109.0.1518.52

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

! Doctor found issues in 1 category.

[AlexSensey]

When the program does not open, it is in the background tasks.
And if everything is fine, then in Apps

I still don't understand why the program starts in different ways.

[mikehearn]

I'm seeing the same problem. The dead tasks are sitting in the message loop, waiting for something to happen.