tests fail in 2038

[bmwiedemann]

Describe the issue

While working on reproducible builds for openSUSE, I found that
our weblate package failed to build in 2038, because a test failed:

ERROR: test_upstream_changes_rename (weblate.vcs.tests.test_vcs.VCSHgTest)
weblate.vcs.base.RepositoryException: hg: parse error: date exceeds 32 bits: 2180462939

Background:
As part of my work on reproducible builds for openSUSE, I check that software still gives identical build results in the future.
The usual offset is +16 years, because that is how long I expect some software will be used in some places.
This showed up failing tests in our package build.
See https://reproducible-builds.org/ for why this matters.

I already tried

• I've read and searched the documentation.
• I've searched for similar issues in this repository.

Steps to reproduce the behavior

1. on Debian or openSUSE do
2. osc co openSUSE:Factory/weblate && cd $_
3. osc build --vm-type=kvm --noservice --clean --build-opt=--vm-custom-opt="-rtc base=2038-09-04T00:00:00" standard

Expected behavior

tests should keep passing in future

Screenshots

No response

Exception traceback

ERROR: test_upstream_changes_rename (weblate.vcs.tests.test_vcs.VCSHgTest)
weblate.vcs.base.RepositoryException: hg: parse error: date exceeds 32 bits: 2180462939

How do you run Weblate?

Other

Weblate versions

No response

Weblate deploy checks

No response

Additional context

No response

[nijel]

This is an issue in Mercurial: https://www.mercurial-scm.org/repo/hg/file/tip/mercurial/utils/dateutil.py#l300

[bmwiedemann]

Thanks for the pointer. I filed https://bz.mercurial-scm.org/show_bug.cgi?id=6778