TYPO3 Core

How I understand the issue:

The failing part is SlugHelper::isUniqueInSite(), the method tries to find a page on the pid of the created localization. Since there is already a localization on the same pid (but on a different "origin"), the wrong records get fetched and thus the code fails.

how to reproduce:

- have one rootpage [1] with a site configuration
- have another rootpage [2] without a site configuration (just tested, also fails if a site config exists here)
- on [2], have a translation in language {1} => this gets pid [3]
- configure the site configuration on [1] to contain {1}
- go to page module on language view.
- initiate translation of [1] into {1}

=> SiteNotFoundException
No pseudo-site found in root line of page 3.

So the site finder aims for that translated page from [2], where a translation of [1] should be created.

Patch set 4 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/58229

Patch set 5 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/58229

Patch set 6 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/58229

Patch set 7 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/58229