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 no 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).

Just modifying my comment here as I have looked at this a bit more. Sometimes topics with several replies will only have the latest reply in the RSS. Sometimes the RSS will show all. I am unfortunately not clear on what makes it break. Here is an example of a topic with several replies where the RSS only shows the latest reply.

​https://wordpress.org/support/topic/unauthorized-log-in/feed

[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.