[Build] Android build fails when trying to create default database
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Description
Release Type: Official Release/GitHub
Github
Version:
master
Platform(s):
Android
Describe the bug
The building process throw the exception below when trying to create the default database for an android project.
04-20 18:15:15.033 E/mono (14748): Unhandled Exception:
04-20 18:15:15.033 E/mono (14748): System.TypeInitializationException: The type initializer for 'Stride.Core.IO.VirtualFileSystem' threw an exception. ---> System.TypeInitializationException: The type initializer for 'Stride.Core.PlatformFolders' threw an exception. ---> System.ArgumentNullException: Value cannot be null.
04-20 18:15:15.033 E/mono (14748): Parameter name: path1
04-20 18:15:15.033 E/mono (14748): at System.IO.Path.Combine (System.String path1, System.String path2) [0x00003] in /Users/builder/jenkins/workspace/archive-mono/2019-08/android/release/mcs/class/corlib/System.IO/Path.cs:102
04-20 18:15:15.033 E/mono (14748): at Stride.Core.PlatformFolders.FindCoreAssemblyDirectory (System.String entryDirectory) [0x00001] in <5ae25e3d606045f98461776333eca5c8>:0
04-20 18:15:15.033 E/mono (14748): at Stride.Core.PlatformFolders.GetApplicationBinaryDirectory () [0x00006] in <5ae25e3d606045f98461776333eca5c8>:0
04-20 18:15:15.033 E/mono (14748): at Stride.Core.PlatformFolders..cctor () [0x0003c] in <5ae25e3d606045f98461776333eca5c8>:0
04-20 18:15:15.033 E/mono (14748): --- End of inner exception stack trace ---
04-20 18:15:15.033 E/mono (14748): --- End of inner exception stack trace ---
04-20 18:15:15.033 E/mono (14748): at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.3(intptr,intptr,intptr)
04-20 18:15:15.033 E/mono (14748): at (wrapper native-to-managed) Android.Runtime.DynamicMethodNameCounter.3(intptr,intptr,intptr)
04-20 18:15:15.034 E/mono-rt (14748): [ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'Stride.Core.IO.VirtualFileSystem' threw an exception. ---> System.TypeInitializationException: The type initializer for 'Stride.Core.PlatformFolders' threw an exception. ---> System.ArgumentNullException: Value cannot be null.
04-20 18:15:15.034 E/mono-rt (14748): Parameter name: path1
04-20 18:15:15.034 E/mono-rt (14748): at System.IO.Path.Combine (System.String path1, System.String path2) [0x00003] in /Users/builder/jenkins/workspace/archive-mono/2019-08/android/release/mcs/class/corlib/System.IO/Path.cs:102
04-20 18:15:15.034 E/mono-rt (14748): at Stride.Core.PlatformFolders.FindCoreAssemblyDirectory (System.String entryDirectory) [0x00001] in <5ae25e3d606045f98461776333eca5c8>:0
04-20 18:15:15.034 E/mono-rt (14748): at Stride.Core.PlatformFolders.GetApplicationBinaryDirectory () [0x00006] in <5ae25e3d606045f98461776333eca5c8>:0
04-20 18:15:15.034 E/mono-rt (14748): at Stride.Core.PlatformFolders..cctor () [0x0003c] in <5ae25e3d606045f98461776333eca5c8>:0
04-20 18:15:15.034 E/mono-rt (14748): --- End of inner exception stack trace ---
04-20 18:15:15.034 E/mono-rt (14748): --- End of inner exception stack trace ---
04-20 18:15:15.034 E/mono-rt (14748): at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.3(intptr,intptr,intptr)
04-20 18:15:15.034 E/mono-rt (14748): at (wrapper native-to-managed) Android.Runtime.DynamicMethodNameCounter.3(intptr,intptr,intptr)
To Reproduce
Steps to reproduce the behavior:
- Create a new project with Android added
- Build the project through Visual Studio with any Android device or emulator
It might be necessary to build the engine for Android in case you haven't done yet.
Expected behavior
The build for Android should run without any issue
Screenshots

Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the failure by creating a project with Android support and building it through Visual Studio on a device or emulator. Inspect Stride.Core.PlatformFolders, especially FindCoreAssemblyDirectory and GetApplicationBinaryDirectory, along with the VirtualFileSystem initializer, to trace the null path. Done means the default database is created and the Android build runs without the reported exception.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- android, csharp
- Domain
- build-system, mobile
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100