Some large-ish filters (tag sets) of Stackexchange, grouping favorite tags of mine, (erroneously) don't return anything if I ask for 'newest' or 'no answers' sorting. For instance:

  • This one doesn't return anything for "no answers" (but it should return, e.g. : 1)
  • That one doesn't return anything for either "newest" or "no answers"

I'm not subscribed to email notices for those tagsets, so i can't tell if they have stopped coming, but the corresponding RSS feeds are empty. I have tried updating "my favorite tags", using https://stackexchange.com/filters/re-sync/<filterid> while logged in, to no avail (it generated a tag set whose "newest" and "no answer" sorts display nothing). This led me to think that those sorts ("newest", "no answers") are not handled/computed/updated for newly created tagsets, is that true ?

  • Edit (07/17 06:00 UTC): Now I have nothing for "newest" for the first filter either.
  • Edit (07/17 15:15 UTC): Now "newest" sorting is back for the first filter (link on the line above). The second filter set consistently has "newest" and "no answers" sorting off, though.

In both of the links provided, I see several results. Is this possibly a case of hiding ignored tags?


After a recent round of improvements to the SQL query backing filters, large-ish filters such as the ones linked to in this question aren't erroring any more.

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