Trace2FileWriter: ignore some exceptions on write

src/shared/Core/Trace2FileWriter.cs

@@ -1,4 +1,5 @@
 using System.IO;
+using System;
 
 namespace GitCredentialManager;
 
@@ -13,6 +14,22 @@ public Trace2FileWriter(Trace2FormatTarget formatTarget, string path) : base(for
 
     public override void Write(Trace2Message message)
     {
-        File.AppendAllText(_path, Format(message));
+        try
+        {
+            File.AppendAllText(_path, Format(message));
+        }
+        catch (DirectoryNotFoundException)
+        {
+            // Do nothing, as this either means we don't have the
+            // parent directories above the file, or this trace2
+            // target points to a directory.
+        }
+        catch (UnauthorizedAccessException)
+        {
+            // Do nothing, as this either means the file is not
+            // accessible with current permissions, or we are on
+            // Windows and the file is currently open for writing
+            // by another process (likely Git itself.)
+        }
     }
 }