UTF8 encoding error in support forum's RSS feed

[ShinichiN]

When accessing to for example ​https://ja.forums.wordpress.org/rss/view/all-topics , we get encoding error and google chrome browser or SimplePie cannot parse the feed.

I attach xml file that we can see the whole feed.

Here's the WP_Error object I got from SimplePie bundled in WP.

object(WP_Error)#54 (2) {
  ["errors"]=>
  array(1) {
    ["simplepie-error"]=>
    array(1) {
      [0]=>
      string(129) "This XML document is invalid, likely due to invalid characters. XML error: not well-formed (invalid token) at line 338, column 25"
    }
  }
  ["error_data"]=>
  array(0) {
  }
}

And here's the error message Google Chrome gave me.

This page contains the following errors:
error on line 327 at column 26: Input is not proper UTF-8, indicate encoding !
Bytes: 0x08 0xE7 0x8A 0xB6
Below is a rendering of the page up to the first error.

[ShinichiN]

XML from ​https://ja.forums.wordpress.org/rss/view/all-topics

[ocean90]

I have removed the char from the post but it seems like the feed is cached somewhere.

[ocean90]

There was a new post, so the feed got re-built. It's now valid again: ​https://validator.w3.org/feed/check.cgi?url=https%3A%2F%2Fja.forums.wordpress.org%2Frss%2Fview%2Fall-topics

[tg29359]

This problem has been reproduced.

​https://ja.forums.wordpress.org/rss

It is not fixed.

And I think that rebuilding the feed is merely the time being. It is not resolusion for all the dashboards of Japanese users.

[ocean90]

The broken char was removed yesterday.

[tg29359]

The broken char will be back soon. And this ticket shall be reopened soon.

[tg29359]

This problem has been reproduced.

​https://ja.forums.wordpress.org/rss

The broken char has returned today.
Please remove it again (and again and again and forever).
But this time, Google Chrome says that Bytes: 0x03 0x26 0x23 0x33, not 0x08.

[ocean90]

Should be finally fixed with the upgrade to bbPress 2.x, see #1544.

[tg29359]

Reproduced? or another problem?

​https://ja.forums.wordpress.org/rss

[SergeyBiryukov]

#656 was marked as a duplicate.