Sticky topics have malformed RSS feeds

[netweb]

Via https://meta.trac.wordpress.org/ticket/1999#comment:8

For example, the stuck topic ​https://wordpress.org/support/topic/read-before-posting-13/

In the forum ​https://wordpress.org/support/plugin/wordfence

Has no replies in the topic feed ​https://wordpress.org/support/topic/read-before-posting-13/feed

Whereas this topic (global sticky) works as expected: ​https://wordpress.org/support/topic/forum-bugs-and-broken-things/feed with all the correct RSS2 <item> elements for the topic.

[SergeyBiryukov]

Could not reproduce on a local install, might be something specific to dotorg.

[wfasa]

Hi! Thanks for creating this bug. I just wanted to add that unfortunately it seems to be the case that all or at least the majority of support posts before the forum upgrade have an empty RSS.

[wfasa]

For further information on this bug it seems like the RSS is broken for all topics that have more than one post (i.e. that has any replies).

[TweetyThierry]

This seems that it is happening on a lot of support thread, for example ​https://wordpress.org/support/topic/jetpack-making-https-links-when-publicize/feed

Anyone looked into this one?

[dd32]

In 9606:

Support Forums: Don't limit topic threads feeds to posts within the last month. The limit still applies for Forums/archives/etc.

Props TweetyThierry.
Fixes #2048.