fix scanner crash caused by invalid mtime (#934)

CHANGELOG.md

@@ -7,6 +7,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Fixed
 - When all audio streams are selected with `HLS Direct`, explicitly copy them without transcoding
   - This only happens when the channel does not have a `Preferred Audio Language`
+- Fix scanner crash caused by invalid mtime
 
 ## [0.6.6-beta] - 2022-08-17
 ### Fixed

ErsatzTV.Core/Metadata/LocalFileSystem.cs

@@ -33,8 +33,17 @@ public class LocalFileSystem : ILocalFileSystem
         return Unit.Default;
     }
 
-    public DateTime GetLastWriteTime(string path) =>
-        Try(File.GetLastWriteTimeUtc(path)).IfFail(() => SystemTime.MinValueUtc);
+    public DateTime GetLastWriteTime(string path)
+    {
+        try
+        {
+            return File.GetLastWriteTimeUtc(path);
+        }
+        catch
+        {
+            return SystemTime.MinValueUtc;
+        }
+    }
 
     public bool IsLibraryPathAccessible(LibraryPath libraryPath) =>
         Directory.Exists(libraryPath.Path);