Moving a topic from one forum to another forum results in a 500 error

[netweb]

Steps to reproduce:

1. Create a topic (with or without a reply)
2. Move the topic to another forum by editing the topic and selecting a new destination forum, click submit

Result: 500 Error

Workaround: The topic and replies (if any) have actually moved to the new destination forum and no further action is required.

Caveat: Topic and Reply post and post meta data integrity should be verified here

Expected: Topic and replies to be moved without error

[Clorith]

This also happens when splitting a reply to it's own topic from an existing thread.

Some metadata is lost, but the split is performed, a blind edit with no changes afterwards seems to restore the missing data of the split post.

[Clorith]

We tracked this down to bbPress re-counting topics and replies in the forums you move to and from, causing timeouts on large sites like ours. Closing as wontfix from our side of things as they lack filters and actions to change this beyond hacking bbPress files our selves. They are aware of the issue and working on a better implementation.