When used on a page Talk:Foo, ((Article section|bar)) links to the page Foo#bar. That's good! But tif the discussion from Talk:Foo gets archived to Talk:Foo/Archive, ((Article section|bar)) instead links to Foo/Archive#bar if Foo/Archive exists, which is not correct. But it probably doesn't exist, so instead it's a redlink to create the article, via &action=edit&redlink=1, which is also wrong. See for example the first sentence of the first section of Wikipedia talk:Stand-alone lists/Archive 9. The template blindly uses ((ARTICLEPAGENAME)), which is only correct if the talkpage is "at the same level" (not a subpage) as the article.
As a first pass, should we throw a visible error (rather than incorrect redlink) if the article does not exist? Shame ((#ifexist:...)) is "expensive". To actually solve it, we would need to figure out how many subpages to strip off until we found one that exists. I guess one solution (most common case?) would be to use ((#titleparts:((ARTICLEPAGENAME))|-1)) if $ifexist is false. DMacks (talk) 22:35, 5 January 2017 (UTC)