Appcenter-sdk-dotnet: FlushQueueAsync System.NullReferenceException

[poumason]

Description

InnerException
HResult:-2147467261
Name:System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.AppCenter.Storage.StorageAdapter.CountAsync[T](Expression`1) + 0x2a
   at Microsoft.AppCenter.Storage.Storage.<>c__DisplayClass14_0.<CountLogsAsync>b__0() + 0x16f
   at System.Func`1.Invoke() + 0x28
   at System.Threading.Tasks.Task`1.InnerInvoke() + 0x25
   at System.Threading.Tasks.Task.Execute() + 0x1c
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task) + 0x70
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task) + 0x38
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task) + 0x17
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult() + 0xb
   at Microsoft.AppCenter.Storage.Storage.<FlushQueueAsync>d__27.MoveNext() + 0x1da

Message:Object reference not set to an instance of an object.
   at Microsoft.AppCenter.Storage.StorageAdapter.CountAsync[T](Expression`1) + 0x2a
   at Microsoft.AppCenter.Storage.Storage.<>c__DisplayClass14_0.<CountLogsAsync>b__0() + 0x16f
   at System.Func`1.Invoke() + 0x28
   at System.Threading.Tasks.Task`1.InnerInvoke() + 0x25
   at System.Threading.Tasks.Task.Execute() + 0x1c
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task) + 0x70
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task) + 0x38
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task) + 0x17
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult() + 0xb
   at Microsoft.AppCenter.Storage.Storage.<FlushQueueAsync>d__27.MoveNext() + 0x1da

Repro Steps

I use AppCenter 2.5.0 version, I receive crash log.
But I don't know how to repeat steps to happens it.

Details

1. What is your app platform (Xamarin.Android or Xamarin.iOS or UWP)?
   
   
   
   • UWP
   
   
2. If using Xamarin.Forms or if using portable/shared code to call our SDK APIs, are you using shared project, PCL code or .NET standard code for the application? Which .NET standard version or which PCL profile?
   
   
   
   • e.g. .NET standard 2.0.
   
   
3. Which SDK version are you using?
   
   
   
   • 2.5.0
   
   
4. Which OS version did you experience the issue on?
   
   
   
   • Windows 10.0.18362.476
   
   
5. What device version did you see this error on? Were you using an emulator or a physical device?
   
   
   
   • MS-7B07
   
   

[annakocheshkova]

Hi there! Thank you for reporting this. We will take a look and try to reproduce.

[MatkovIvan]

Hi,

It looks like there was some error during database initialization, so the SDK doesn't have a valid connection.
We'll fix the crash, so it will be just a readable error log.

[MatkovIvan]

This issue has been fixed in version 3.0.0.