I was trying to restore my database and SQL Server kept crashing. I would get a message in SSMS that said there was a network transport error (the connection dropped bc the crash). I checked the logs and found nothing more than SQL Server closed unexpectedly. I would then have to go and restart the service.

I narrowed the issue down to the script that the GUI was trying to run. The problem is when it goes to take a tail log backup, the path to the backup files is wrong. It should be `D:\mapbenefits\...`

```
BACKUP LOG [mapbenefits]
TO  DISK = N'D:mapbenefits_LogBackup_2019-02-21_13-58-24.bak'
WITH NOFORMAT, NOINIT,  NAME = N'mapbenefits_LogBackup_2019-02-21_13-58-24',
    NOSKIP, NOREWIND, NOUNLOAD,  NORECOVERY ,  STATS = 5
```


I have two questions. 

1. How do I fix this path? I tried going into the server settings and the backup path is `D:` with no slash. If I add the slash the gui removes it. This is SSMS v17.9.1. I can pick `D:\mapbenefits\` and that works but I want `D:\DATABASE\...`

2. Is this a bug? Should SQL server crash just because a path is incorrectly typed? Once I fixed the file path it has no trouble. I can reproduce anytime just by mucking up the filepath. 

If I run a query to check version I get CU13, but if I go into settings I see version 14.0.1000.169.


Looks like this is a bug and is reproducible so I posted it to here: https://feedback.azure.com/forums/908035-sql-server/suggestions/36920542-incorrect-filepath-with-backup-log-command-causes