When trying to upgrade Tumbleweed after refreshing the repos, I get the
following error:

tortoisehg-6.5.1-1.13.noarch requires mercurial < 6.6 but this requirement
cannot be satisfied

The underlying reason being that the upgrade bumps mercurial's version from
6.5.3-334.1 to 6.6-336.1, however the list of dependencies of the thg package
have not been updated.

Apparently this is not the first time this problem occurs:

https://bugzilla.opensuse.org/show_bug.cgi?id=1023846

As far as I am concerned, on the rare occasions when I have trouble upgrading
Tumbleweed, the culprits are always thg/mercurial.