I have downgraded the bug to non-RC severity temporarily and reverted CMake in unstable to version 3.31.6. I plan to re-upgrade in about a month's time. I realize that despite my April announcement, the upload to unstable came rather surprising, and I don't want to cause unnecessary pain.
Also, the build log URL has an unfortunate mistake. The correct URL should include the workspace, i.e., https://debusine.debian.net/debian/developers/artifact/XXXX CMake 4 will also be available in experimental again, so it can be used to verify that the bug is fixed. Cheers Timo