[Bug]: package_info_plus not working in Windows release build when run from network location

[cybrox]

Platform

Windows 10

Plugin

package_info_plus

Version

3.0.2

Flutter SDK

3.7.0

Steps to reproduce

1. Build the example in plus_plugins\packages\package_info_plus\package_info_plus\example with flutter build windows --release
2. Copy the resulting files from build\windows\runner\Release to a local drive (e.g. C:\test) -> works fine
3. Copy the resulting files from build\windows\runner\Release to a network drive (e.g. \\COMPANY-PROFILE\Dekstop) -> does not work

The following screenshot shows the actual result. The left app was run from the C:\ drive and the right one was run from a network location. Both use the same files from the same build.

When adding the plugin to my own app, I originally did not wrap the calls in try/catch, which yielded me the following exception when running from a network drive: Error 0x8007007a: Der an einen Systemaufruf übergebene Datenbereich ist zu klein. I can't change the language of the network drive but googling it and changing the language on the Microsoft page gives me "The data area passed to a system call is too small", which sounds about right.

Code Sample

No response

Logs

_example app does not output logs_

Flutter Doctor

[√] Flutter (Channel stable, 3.7.0, on Microsoft Windows [Version 10.0.19045.2364], locale de-CH)
    • Flutter version 3.7.0 on channel stable at C:\Flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision b06b8b2710 (6 days ago), 2023-01-23 16:55:55 -0800
    • Engine revision b24591ed32
    • Dart version 2.19.0
    • DevTools version 2.20.1

[X] Windows Version (Unable to confirm if installed Windows version is 10 or greater)

[X] Android toolchain - develop for Android devices
    X Unable to locate Android SDK.
      Install Android Studio from: https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK components.
      (or visit https://flutter.dev/docs/get-started/install/windows#android-setup for detailed instructions).
      If the Android SDK has been installed to a custom location, please use
      `flutter config --android-sdk` to update to that location.


[√] Visual Studio - develop for Windows (Visual Studio Community 2022 17.4.3)
    • Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
    • Visual Studio Community 2022 version 17.4.33205.214
    • Windows 10 SDK version 10.0.22000.0

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/windows#android-setup for detailed instructions).

[√] VS Code (version 1.74.3)
    • VS Code at C:\Users\sgehring\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.58.0

[√] Connected device (1 available)
    • Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.19045.2364]

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

! Doctor found issues in 3 categories.


For Windows Version, `winver` gives `Version 22H2 (Build 19045.2364)`

Checklist before submitting a bug

• I Google'd a solution and I couldn't find it
• I searched on StackOverflow for a solution and I couldn't find it
• I read the README.md file of the plugin
• I'm using the latest version of the plugin
• All dependencies are up to date with flutter pub upgrade
• I did a flutter clean
• I tried running the example project

[mmasdivins]

I have the same issue, any news?
It happens in debug mode too.

[mmasdivins]

I found the problem:
In package_info_plus_windows.dart on

    final info = _FileVersionInfo(Platform.resolvedExecutable);

The Platform.resolvedExecutable if the path is a network location that should return for example:

\\server\test\example.exe

Instead it returns:

UNC\server\test\example.exe

Replacing "UNC" to "\" will solve the issue, but someone with better knowledge should look into it!

[timsneath]

I think this is a bug in the Dart SDK.
https://github.com/dart-lang/sdk/blob/6e18b083dd302a4c32bd6c49a50e68f3cea7331a/runtime/bin/file_win.cc#L1060-L1065 removes the leading \\?\, which leaves an invalid file path on Windows in this scenario.

I believe this is intended to convert \\?\c:\temp\test-file.txt to c:\temp\test-file.txt (for reasons that are unclear to me), which at least leaves a valid file path. But for input like \\?\UNC\LOCALHOST\c$\temp\test-file.txt, which is a valid way to express C:\temp\test-file.txt, the code here will return UNC\LOCALHOST\c$\temp\test-file.txt, which is obviously not valid.

Looks like @bkonyi and @aam last touched this code on the Dart VM side.

Edit: changed example from \\.\ to \\?\, which is the URL format that is likely being twiddled per @aam comment below.

[aam]

\\?\ prefix that highlighted code is attempting to remove is used on Windows to prepend file path strings, that exceed MAX_PATH in length (https://learn.microsoft.com/en-us/windows/win32/fileio/naming-a-file?redirectedfrom=MSDN#maximum-path-length-limitation)

Not sure where \\.\ comes into picture. I am not sure extent to which Windows UNC paths are supported.

[timsneath]

@aam I filed dart-lang/sdk#52309 to try and add a little more detail.

\\.\ and \\?\ are very similar prefixes. Both could be returned by Windows. I'll edit my earlier comment to try and resolve the confusion.