Duplicati: Backup fails with root of drive in source

[Exaktus]

• [x ] I have searched open and closed issues for duplicates.

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Environment info

• Duplicati version: 2.0.4.14_canary_2019-01-30
• Operating system: Win10 x64

Description

Function LocalDatabase.SplitIntoPrefixAndName fails with short path (i.e. "G:\")
https://github.com/duplicati/duplicati/blob/c1578c6c0eed8312c67262cf4aa3ed0a9fdf3cc7/Duplicati/Library/Main/Database/LocalDatabase.cs#L1483

Steps to reproduce

1. Add drive root to source.
2. Start backup.

• Actual result:
  Backup fails with error:
  System.ArgumentException: Invalid path: W:\ Parameter name: path

• Expected result:
  Successful backup.

Debug log

System.ArgumentException: Invalid path: W:\
Parameter name: path
   at Duplicati.Library.Main.Database.LocalDatabase.SplitIntoPrefixAndName(String path)
   at Duplicati.Library.Main.Database.LocalBackupDatabase.AddFile(String filename, DateTime lastmodified, Int64 blocksetID, Int64 metadataID, IDbTransaction transaction)
   at Duplicati.Library.Main.Operation.Backup.BackupDatabase.<>c__DisplayClass8_0.<AddDirectoryEntryAsync>b__0()
   at Duplicati.Library.Main.Operation.Common.SingleRunner.<>c__DisplayClass3_0.<RunOnMain>b__0()
   at Duplicati.Library.Main.Operation.Common.SingleRunner.<DoRunOnMain>d__2`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.<AddFolderToOutputAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.<ProcessMetadata>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.<>c__DisplayClass2_0.<<Run>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at CoCoL.AutomationExtensions.<RunTask>d__10`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Duplicati.Library.Main.Operation.BackupHandler.<RunMainOperation>d__12.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Duplicati.Library.Main.Operation.BackupHandler.<RunAsync>d__19.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at CoCoL.ChannelExtensions.WaitForTaskOrThrow(Task task)
   at Duplicati.Library.Main.Controller.<>c__DisplayClass13_0.<Backup>b__0(BackupResults result)
   at Duplicati.Library.Main.Controller.RunAction[T](T result, String[]& paths, IFilter& filter, Action`1 method)
   at Duplicati.Library.Main.Controller.Backup(String[] inputsources, IFilter filter)
   at Duplicati.Server.Runner.Run(IRunnerData data, Boolean fromQueue)

[huste]

I can verify that. I had the broken .13 version installed first, upgraded to .14, did a complete remove/repair for the database and get the same result.

[ablakers]

I'm getting the same and I skipped .13

[ethauvin]

Same here.