remove reference to currentuser when processing bulk reverts

app/logical/bulk_revert.rb

@@ -7,7 +7,7 @@ class BulkRevert
   def process(constraints)
     @constraints = constraints
     
-    ModAction.log("#{CurrentUser.name} processed bulk revert for #{constraints.inspect}")
+    ModAction.log("Processed bulk revert for #{constraints.inspect}")
 
     find_post_versions.order("updated_at, id").each do |version|
       version.undo!

app/models/tag.rb

@@ -141,9 +141,12 @@ class Tag < ApplicationRecord
       Post.with_timeout(30_000, nil, {:tags => name}) do
         Post.raw_tag_match(name).where("true /* Tag#update_category_post_counts */").find_each do |post|
           post.reload
-          post.set_tag_counts(false)
-          args = TagCategory.categories.map {|x| ["tag_count_#{x}",post.send("tag_count_#{x}")]}.to_h.update(:tag_count => post.tag_count)
-          Post.where(:id => post.id).update_all(args)
+          # sometimes a post gets expunged
+          if post
+            post.set_tag_counts(false)
+            args = TagCategory.categories.map {|x| ["tag_count_#{x}",post.send("tag_count_#{x}")]}.to_h.update(:tag_count => post.tag_count)
+            Post.where(:id => post.id).update_all(args)
+          end
         end
       end
     end