Safe repr for error pages

This seems like the same issue are you’ve posted before… — even if it’s a variant, it’s related. It would be good to try and keep related topics all together, rather than creating small variant threads. Duplicates force people to go and find the old conversation, to remember what was said. They also risk the reasons given previously being forgotten/overlooked.

There have been other discussions in this space too. It would be worth trying to corral the considerations to see if we can resolve/improve the underlying issue.