BeforeQuit bug #504

New Issue

claunia · 2026-01-29T16:41:23Z

claunia commented

2026-01-29 16:41:23 +00:00

Originally created by @BurtsevC on GitHub (May 28, 2020).

Version: v8.31.2
Target: .NET Core 3.1
electron.manifest.json: "singleInstance": true

Add a listener to Electron.App.BeforeQuit and show MessageBoxResult in it. Try to open the app again while MessageBoxResult is still opening. The problem is more than that, I saw it with Debian when I show MessageBoxResult, close it and tried to open the app for about 5 - 10 seconds after closing. I got the same problem "Object has been destroyed" although the app is closed and even MessageBoxResult is closed.

The same bug can be repeated with WindowAllClosed. Try to open the app while ShowMessageBoxAsync is active.

public void ElectronBootstrap()
{
    Electron.WindowManager.IsQuitOnWindowAllClosed = false;
    Electron.App.WindowAllClosed += App_WindowAllClosed;
}

private async void App_WindowAllClosed()
{
    await Electron.Dialog.ShowMessageBoxAsync("All windows closed");
}

Originally created by @BurtsevC on GitHub (May 28, 2020). - **Version**: v8.31.2 - **Target**: .NET Core 3.1 - **electron.manifest.json**: "singleInstance": true Add a listener to Electron.App.BeforeQuit and show MessageBoxResult in it. Try to open the app again while MessageBoxResult is still opening. The problem is more than that, I saw it with Debian when I show MessageBoxResult, close it and tried to open the app for about 5 - 10 seconds after closing. I got the same problem "Object has been destroyed" although the app is closed and even MessageBoxResult is closed. ![bug](https://user-images.githubusercontent.com/47857073/83139175-9b86f980-a0f4-11ea-9144-aca27c885c93.PNG) The same bug can be repeated with WindowAllClosed. Try to open the app while ShowMessageBoxAsync is active. ``` public void ElectronBootstrap() { Electron.WindowManager.IsQuitOnWindowAllClosed = false; Electron.App.WindowAllClosed += App_WindowAllClosed; } private async void App_WindowAllClosed() { await Electron.Dialog.ShowMessageBoxAsync("All windows closed"); } ```

claunia added the bug label 2026-01-29 16:41:23 +00:00

claunia closed this issue

2026-01-29 16:41:23 +00:00

claunia commented

2026-01-29 16:41:23 +00:00

@BurtsevC commented on GitHub (Jun 1, 2020):

It's my fault, I have used RequestSingleInstanceLockAsync but forgot to ReleaseSingleInstanceLock in BeforeQuit.

@BurtsevC commented on GitHub (Jun 1, 2020): It's my fault, I have used RequestSingleInstanceLockAsync but forgot to ReleaseSingleInstanceLock in BeforeQuit.

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Reference: starred/Electron.NET#504