Rescue all errors when backfilling shas for uploads.

lib/tasks/uploads.rake

@@ -71,11 +71,8 @@ task "uploads:backfill_shas" => :environment do
         u.sha1 = Digest::SHA1.file(path).hexdigest
         u.save!
         putc "."
-      rescue ActiveRecord::RecordInvalid
-        puts "#{u.extension} is not valid"
-        putc "X"
-      rescue Errno::ENOENT
-        putc "X"
+      rescue => e
+        putc "Skipping #{upload.original_filename} (#{upload.url}) #{e.message}"
       end
     end
   end