When the wikitext markup produces incorrect element nesting, the visual diff tool just hangs. For example, this edit added an <s> element that spanned across block display elements:
I realize the halting problem means it's impossible to stop all hangs. Nonetheless, this type of markup error is not unusual on talk pages. Is there anything that can be done to help prevent this as often as possible?
Apologies if this has been discussed before or if there is a ticket; I don't know how to search this structured discussion (Flow) or Phabricator.