"Source file could not be found" error after editor script creates and deletes a cs file

I have an editor script that creates other scripts in the project. It needs to make a few scripts at a time, and throws an exception if it would end up overwriting anything. If it fails, I'm making it so that it will clean up any of the scripts that it made before it ran into the error.

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My code works fairly well, but I'm running it a strange issue. If something goes wrong partway through the process, Unity says something like this:

error CS2001: Source file 'Assets/tmp/Editor/BoolRefEditor.cs' could not be found

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I think that it's happening because the script listed in the error is getting created, found by Unity, and then deleted. Some time during the reload process, Unity must realize it's no longer there, and dumps the error into the Debug console.

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I'm not sure how to fix this. I'm using StreamWriter to create the file, and then I'm loading the file using LoadAssetAtPath so that I may put a label on the file. Finally, in the case of an error, I use AssetDatabase.DeleteAsset to delete the files.

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My first thought was to avoid using any of Unity's file management tools, so I tried removing the label-adding code and using File.Delete instead of AssetDatabase.DeleteAsset. However, the error message still showed up.

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Because it's a fair amount of code, I've dumped the full file in hastebin. (Keep in mind that the first comment block is fairly old.)

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But, in case that link comes down, here is the relevant code block:

     try {
         EditorApplication.LockReloadAssemblies();
 
         foreach(TemplateInfo template in TemplateFileManager.Templates) {
 
             string newScriptPath = CreateScriptFromTemplate(
                 readableName, typeName, referability,
                 template, targetPath, editorPath
             );
 
             if(!string.IsNullOrEmpty(newScriptPath)) {
                 newFilePaths.Add(newScriptPath);
             }
 
         } // End foreach(TemplateInfo template in Files.Templates) 
     } // End try
     catch(System.Exception e) {
 
         // TODO When this happens, Unity occasionally complains about
         // a source file not being found. Somehow, it picks up the new
         // scripts before they get deleted.
 
         foreach(string path in newFilePaths) {
             AssetDatabase.DeleteAsset(path);
 
             /* This isn't any better
             File.Delete(path);
             */
         }
 
         throw e;
     }
     finally {
         EditorApplication.UnlockReloadAssemblies();
         AssetDatabase.Refresh();
     }

After creating the file using StreamWriter, CreateScriptFromTemplate has this code: // NOTE: I have tried commenting this out, but it hasn't helped

         // To add labels, we need to load the object. To do that,
         // it must be in the project view. Thus, we must reload.
         AssetDatabase.Refresh();
         UnityEngine.Object newFileObj =
         AssetDatabase.LoadAssetAtPath<UnityEngine.Object>(newFilePath);
         AssetDatabase.SetLabels(newFileObj, new string[] { ScriptFileManager.CustomLabel } );

(Please forgive some of the unused stuff and overall silliness. I've recently finished with the bulk of this code and am cleaning it up.)