Description
openedon Jul 10, 2024
Description
I just moved to MAUI 9 this morning (specifically 9.0.0-preview.6.24327.7). I was using .NET 8.0 prior to this and everything was fine. I noticed that the first build of solution would work fine, but if I did a rebuild all, the build would fail with an UnauthorizedAccessException. The only way I can get it to go away is to close and reopen VS (I'm using 17.11.0 Preview 3.0, for the record, running in admin mode on Win 10). After that, it builds again, but only once before I start getting the UnauthorizedAccessExceptions.
To investigate, I made a blank .NET MAUI 8 app and tried it - everything builds fine. You can 'Rebuild All' as many times as you want and it'll compete successfully.
Then I made a blank .NET MAUI 9 app and built it - it was fine the first time. Then I tried 'Rebuild All' and, unfortunately, ran into the same UnauthorizedAccessExceptions during the build:
Error (active) XARDF7019 System.UnauthorizedAccessException: Access to the path 'GoogleGson.dll' is denied.
at System.IO.Directory.DeleteHelper(String fullPath, String userPath, Boolean recursive, Boolean throwOnTopLevelDirectoryNotFound, WIN32_FIND_DATA& data)
at System.IO.Directory.Delete(String fullPath, String userPath, Boolean recursive, Boolean checkHost)
at Xamarin.Android.Tasks.RemoveDirFixed.RunTask() in /Users/runner/work/1/s/xamarin-android/src/Xamarin.Android.Build.Tasks/Tasks/RemoveDirFixed.cs:line 54 MauiApp2 (net9.0-android) C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.99.0-preview.6.340\tools\Xamarin.Android.Common.targets 2503
and
Error (active) XALNS7019 System.UnauthorizedAccessException: Access to the path 'D:\Projects\MauiApp2\obj\Debug\net9.0-android\android\assets\armeabi-v7a\MauiApp2.dll' is denied.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.File.InternalDelete(String path, Boolean checkHost)
at Microsoft.Android.Build.Tasks.Files.CopyIfChanged(String source, String destination) in /Users/runner/work/1/s/xamarin-android/external/xamarin-android-tools/src/Microsoft.Android.Build.BaseTasks/Files.cs:line 125
at Xamarin.Android.Tasks.MonoAndroidHelper.CopyAssemblyAndSymbols(String source, String destination) in /Users/runner/work/1/s/xamarin-android/src/Xamarin.Android.Build.Tasks/Utilities/MonoAndroidHelper.cs:line 344
at Xamarin.Android.Tasks.LinkAssembliesNoShrink.CopyIfChanged(ITaskItem source, ITaskItem destination) in /Users/runner/work/1/s/xamarin-android/src/Xamarin.Android.Build.Tasks/Tasks/LinkAssembliesNoShrink.cs:line 161
at Xamarin.Android.Tasks.LinkAssembliesNoShrink.RunTask() in /Users/runner/work/1/s/xamarin-android/src/Xamarin.Android.Build.Tasks/Tasks/LinkAssembliesNoShrink.cs:line 76
at Microsoft.Android.Build.Tasks.AndroidTask.Execute() in /Users/runner/work/1/s/xamarin-android/external/xamarin-android-tools/src/Microsoft.Android.Build.BaseTasks/AndroidTask.cs:line 25 MauiApp2 (net9.0-android) C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.99.0-preview.6.340\tools\Xamarin.Android.Common.targets 1407
These all seem to be Android-releated. And when I try to deploy the successful build to my Android device, I get this error:
Error XA0127: Error deploying 'files/.__override__/arm64-v8a/ar//Microsoft.Maui.Controls.resources.dll' using 'xamarin.sync: error: could not open 'files/.__override__/arm64-v8a/ar//Microsoft.Maui.Controls.resources.dll'.'.
Please set the 'EmbedAssembliesIntoApk' MSBuild property to 'true' to disable Fast Deployment in the Visual Studio project property pages, or edit the project file in a text editor.
I never got this error with .NET 8.0. Again, this is a fresh MAUI 9.0 app.
Steps to Reproduce
- Create a new, default .NET MAUI 9.0 app (use 9.0.0-preview.6.24327.7).
- Rebuild it. It should succeed.
- Rebuild it again. It should fail with an UnauthorizedAccessException.
Link to public reproduction project repository
https://github.com/whodges/mauiapp1
Version with bug
9.0.0-preview.1.9973
Is this a regression from previous behavior?
Yes, this used to work in .NET MAUI
Last version that worked well
8.0.70
Affected platforms
Android
Affected platform versions
Android 31
Did you find any workaround?
Close and restart Visual Studio (but you'll only get one build out of it).
