Sander78
@sam replied to @codinghorror here. But @codinghorror didn’t post anything in that topic and if you click on his name nothing happens.
Unless he did post, but the post was deleted.
Anyway, odd behaviour I’d say.
A partial archive of meta.discourse.org as of Tuesday July 18, 2017.
Post shows reply to non existing post
sam
It is a subtle “delete” bug.
If you delete the post then replies to the post still keep the breadcrumb.
codinghorror
I don’t see this as a bug, the metadata is still valid, and the post may be undeleted at some time too.
Sander78
If it’s intended to work that way, then it’s not a bug indeed. But it’s a bit confusing. @Sam’s post says it’s a reply to your post, but noone can see it.
fefrei
I think the correct behavior would be to show an error message when the user tries to expand this post, stating that he doesn’t have the required permissions / the post was deleted 
codinghorror
You can test a similar behavior by quoting a section of a post, deleting the post you quoted from, then trying to expand the quote.
erlend_sh
Could we at least throw an error message of some kind here, explaining what happened?