Error closing the app in Windows

[splcoder]

Hi there

I'm new in Beeware, and I'm doing some examples from the Beeware home page, more exactly "https://docs.beeware.org/en/latest/tutorial/tutorial-2.html", and I'm having the next error when the app opens, click the button, and then close the app (but NOT when the app opens, and directly then close the app):

_Windows fatal exception: access violation

Current thread 0x00004a10 (most recent call first):
  <no Python frame>

Thread 0x000028c4 (most recent call first):
  File "C:\Installed\Docs\Anaconda\envs\beeware\lib\site-packages\clr_loader\types.py", line 64 in __call__
  File "C:\Installed\Docs\Anaconda\envs\beeware\lib\site-packages\pythonnet\__init__.py", line 161 in unload_

Greetings

[freakboy3742]

I can't say I've seen that error myself - can you clarify exactly what you're doing to get this error?

1. Click on "the button" - Tutorial 2 has 10 buttons on the right hand side panel, plus 4 toolbar buttons. Which button do you mean?
2. "Directly close the app" - using what mechanism? The close widget on the top right of the window? File > Exit from the menu? Something else
3. Some of the button handlers have long running effects in the terminal. Are you quitting the app immediately after pressing the button, or waiting some time for the handler to finish running (i.e., what else is displayed in the terminal other than the stack trace)

Also - can you tell us:

• The version of Toga you're using
• The version of Python you're using
• The version of Windows you're using

[rmartin16]

as a datapoint....I could only repro this using Toga 0.3.1. In those cases, I used briefcase dev, clicked the button, and clicked the X in the top right. Although, I had a stack line under "Current thread" for winforms.proacter.tick(). Seemed to be a low chance of happening, though....had to repeat this process many times.

As a note, I didn't use Tutorial 2....I used the "print Hello, <name>" example in the BeeWare tutorial.

[rmartin16]

Tried ~100 times with Toga main branch installed but still couldn't repro.

Was able to pretty easily with Toga 0.3.1, though....this time without a mention to winforms.proacter.tick()...so maybe a red herring.

Log

Date/Time:       2023-10-23 04:58:42 
Command line:    C:\Users\user\github\beeware\briefcase\venv-3.10-briefcase\Scripts\briefcase dev --log

OS Release:      Windows 10
OS Version:      10.0.22621
Architecture:    AMD64
Platform:        Windows-10-10.0.22621-SP0

Python exe:      C:\Users\user\github\beeware\briefcase\venv-3.10-briefcase\Scripts\python.exe
Python version:  3.10.11 (tags/v3.10.11:7d4cc5a, Apr  5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)]
Virtual env:     True
Conda env:       False

Briefcase:       0.3.16
Target platform: windows
Target format:   None

Environment Variables:
    ALLUSERSPROFILE=C:\ProgramData
    APPDATA=C:\Users\user\AppData\Roaming
    COMMONPROGRAMFILES=C:\Program Files\Common Files
    COMMONPROGRAMFILES(X86)=C:\Program Files (x86)\Common Files
    COMMONPROGRAMW6432=C:\Program Files\Common Files
    COMPUTERNAME=VM-WIN11
    COMSPEC=C:\Windows\system32\cmd.exe
    DRIVERDATA=C:\Windows\System32\Drivers\DriverData
    HOMEDRIVE=C:
    HOMEPATH=\Users\user
    LOCALAPPDATA=C:\Users\user\AppData\Local
    LOGONSERVER=\\VM-WIN11
    NUMBER_OF_PROCESSORS=4
    ONEDRIVE=C:\Users\user\OneDrive
    OS=Windows_NT
    PATH=C:\Users\user\github\beeware\briefcase\venv-3.10-briefcase\Scripts;C:\Program Files\PowerShell\7;C:\Users\user\.pyenv\pyenv-win\shims;C:\Users\user\.pyenv\pyenv-win\versions\3.9.13;C:\Users\user\.pyenv\pyenv-win\versions\3.8.10;C:\Users\user\.pyenv\pyenv-win\versions\3.10.11;C:\Users\user\.pyenv\pyenv-win\versions\3.11.3;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files\Git\cmd;;C:\Program Files\dotnet\;C:\Program Files\starship\bin\;C:\Program Files\Docker\Docker\resources\bin;C:\Program Files\PowerShell\7\;C:\Users\user\.pyenv\pyenv-win\bin;C:\Users\user\.pyenv\pyenv-win\shims;C:\Users\user\AppData\Local\Microsoft\WindowsApps;C:\Users\user\.dotnet\tools;C:\Users\user\.dotnet\tools;C:\Users\user\AppData\Local\Programs\Microsoft VS Code\bin
    PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.CPL
    POWERSHELL_DISTRIBUTION_CHANNEL=MSI:Windows 10 Pro
    PROCESSOR_ARCHITECTURE=AMD64
    PROCESSOR_IDENTIFIER=AMD64 Family 25 Model 33 Stepping 0, AuthenticAMD
    PROCESSOR_LEVEL=25
    PROCESSOR_REVISION=2100
    PROGRAMDATA=C:\ProgramData
    PROGRAMFILES=C:\Program Files
    PROGRAMFILES(X86)=C:\Program Files (x86)
    PROGRAMW6432=C:\Program Files
    PSMODULEPATH=C:\Users\user\Documents\PowerShell\Modules;C:\Program Files\PowerShell\Modules;c:\program files\powershell\7\Modules;C:\Program Files\WindowsPowerShell\Modules;C:\Windows\system32\WindowsPowerShell\v1.0\Modules
    PUBLIC=C:\Users\Public
    PYENV=C:\Users\user\.pyenv\pyenv-win\
    PYENV_HOME=C:\Users\user\.pyenv\pyenv-win\
    PYENV_ROOT=C:\Users\user\.pyenv\pyenv-win\
    SESSIONNAME=Console
    STARSHIP_SESSION_KEY=********************
    STARSHIP_SHELL=pwsh
    SYSTEMDRIVE=C:
    SYSTEMROOT=C:\Windows
    TEMP=C:\Users\user\AppData\Local\Temp
    TMP=C:\Users\user\AppData\Local\Temp
    USERDOMAIN=vm-win11
    USERDOMAIN_ROAMINGPROFILE=vm-win11
    USERNAME=user
    USERPROFILE=C:\Users\user
    VIRTUAL_ENV=C:\Users\user\github\beeware\briefcase\venv-3.10-briefcase
    VIRTUAL_ENV_DISABLE_PROMPT=1
    WINDIR=C:\Windows
    WSLENV=WT_SESSION:WT_PROFILE_ID:
    WT_PROFILE_ID={574e775e-4f2a-5b96-ac1e-a2962a402336}
    WT_SESSION=8d6af7a9-c23d-4ccf-9664-861d7fd60cb6
    _OLD_VIRTUAL_PATH=C:\Program Files\PowerShell\7;C:\Users\user\.pyenv\pyenv-win\shims;C:\Users\user\.pyenv\pyenv-win\versions\3.9.13;C:\Users\user\.pyenv\pyenv-win\versions\3.8.10;C:\Users\user\.pyenv\pyenv-win\versions\3.10.11;C:\Users\user\.pyenv\pyenv-win\versions\3.11.3;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files\Git\cmd;;C:\Program Files\dotnet\;C:\Program Files\starship\bin\;C:\Program Files\Docker\Docker\resources\bin;C:\Program Files\PowerShell\7\;C:\Users\user\.pyenv\pyenv-win\bin;C:\Users\user\.pyenv\pyenv-win\shims;C:\Users\user\AppData\Local\Microsoft\WindowsApps;C:\Users\user\.dotnet\tools;C:\Users\user\.dotnet\tools;C:\Users\user\AppData\Local\Programs\Microsoft VS Code\bin

Briefcase Log:
[04:58:38]                                                                                                                                                                dev.py:228
           [helloworld] Starting in dev mode...                                                                                                                           dev.py:228
                                                                                                                                                                   subprocess.py:711
           >>> Running Command:                                                                                                                                    subprocess.py:712
           >>>     'C:\Users\user\github\beeware\briefcase\venv-3.10-briefcase\Scripts\python.exe' -c 'import runpy,                                               subprocess.py:713
           sys;sys.path.pop(0);sys.argv.extend([]);runpy.run_module("helloworld", run_name="__main__", alter_sys=True)'                                                             
           >>> Working Directory:                                                                                                                                  subprocess.py:720
           >>>     C:\Users\user                                                                                                                                   subprocess.py:721
           >>> Environment Overrides:                                                                                                                              subprocess.py:730
           >>>     PYTHONPATH=C:\Users\user\github\beeware\briefcase\tmp\helloworld\src                                                                            subprocess.py:732
           >>>     PYTHONMALLOC=default                                                                                                                            subprocess.py:732
           >>>     PYTHONUNBUFFERED=1                                                                                                                              subprocess.py:732
           >>>     PYTHONDEVMODE=1                                                                                                                                 subprocess.py:732
           >>>     PYTHONUTF8=1                                                                                                                                    subprocess.py:732
           ===========================================================================                                                                                    run.py:160
[04:58:41] Hello,                                                                                                                                                  subprocess.py:681
[04:58:42] Windows fatal exception: access violation                                                                                                               subprocess.py:681
                                                                                                                                                                   subprocess.py:681
           Current thread 0x00000d44 (most recent call first):                                                                                                     subprocess.py:681
             <no Python frame>                                                                                                                                     subprocess.py:681
                                                                                                                                                                   subprocess.py:681
           Thread 0x00001a74 (most recent call first):                                                                                                             subprocess.py:681
             File "C:\Users\user\github\beeware\briefcase\venv-3.10-briefcase\lib\site-packages\clr_loader\types.py", line 64 in __call__                          subprocess.py:681
             File "C:\Users\user\github\beeware\briefcase\venv-3.10-briefcase\lib\site-packages\pythonnet\__init__.py", line 157 in unload                         subprocess.py:681

[splcoder]

I realised that this error is really extrange:
Yesterday it gaves me many errors of this type.
Today only 1 time at first hour.

I'm working with:
Windows 10
Python 3.10.13
Toga 0.3.1

Executed with:
briefcase dev

Adding a note: it is not required to do anything, only close the app within "X" (I have had more errors of this type).