Checking internal links to current page with missing anchor is not reported as broken link

[sypets]

Note: Same bug exists in linkvalidator. Is most likely due to problem in link (softref) parsing in core. Will not fix in brofix.

Describe the bug

This is reported as broken link (assuming CE #999999999 does not exist on page 27):

<p><a href="t3://page?uid=27#999999999">link to another page with missing anchor</a></p>

This is not reported as broken link (assuming CE #999999999 does not exist on current page):

<p><a href="t3://page?uid=current#99999999">link to current page with missing anchor</a></p>

To Reproduce
Steps to reproduce the behavior:

1. Create a link
2. Switch to source code mode in RTE. Remove the string within the quotes in href="", save
3. The link will now be converted to an internal link to current page (e.g. t3://page?uid=current)
4. Add an anchor to a non existing CE to the link (e.g. t3://page?uid=current#99999)
5. Check internal broken links on current page

Actual behavior

The link is not diplayed as broken.

Expected behavior

The link should be displayed as broken. (This is the case for links with missing CE if a format such as t3://page?uid=123#9999 is used for an existing page with uid 123 which does not have a CE 9999.)

System (please complete the following information):

• TYPO3 version: 11.5 (latest), main
• brofix version: latests
• page_callouts version: not relevant
• installed with Composer: not relevant

Additional context

As described in the forge issue:

This seems to be due to TypolinkTagSoftReferenceParser::parse not considering links with the format t3://page?uid=current#99999999. This function is called in linkvalidator. The parser does not return the t3://page?uid=current links.

So it looks like not an error in linkvalidator, but an error in the link parser.

code:

} elseif ($linkDetails['type'] === LinkService::TYPE_PAGE && preg_match('/page\?uid=(\d+)#?(\d+)?/', $matches[1], $pageAndAnchorMatches)) {

https://github.com/TYPO3/typo3/blob/main/typo3/sysext/core/Classes/DataHandling/SoftReference/TypolinkSoftReferenceParser.php