This package does not support Python 3.12. Please test it with Python 3.12 as a matter of urgency as the default will change in early June, as per message on gentoo-dev: https://www.mail-archive.com/gentoo-dev@lists.gentoo.org/msg99104.html. Please check the information provided in the tracker. Ask in #gentoo-python on IRC if need any help.
Done. Note that the 2 messages in the testsuite about invalid escape sequences are not a regression. The sequences were invalid already before, just the type of message changed. (Eventually this will have to be fixed though.)