testsuite fails on armhf userspace with arm64 kernel

[Dimitri John Ledkov]

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ERROR: breezy.tests.test_timestamp.UnpackHighresDateTests.test_random
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Traceback (most recent call last):
testtools.testresult.real._StringException: Empty attachments:
  log

Traceback (most recent call last):
  File "/<<PKGBUILDDIR>>/breezy/tests/test_timestamp.py", line 129, in test_random
    date = timestamp.format_highres_date(t, o)
  File "/<<PKGBUILDDIR>>/breezy/timestamp.py", line 60, in format_highres_date
    tt = time.gmtime(t + offset)
OverflowError: timestamp out of range for platform time_t

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As seen in the autopkgtests, which run inside an armhf lx[cd] container on arm64 host.

[Jelmer Vernooij (jelmer)]

Can you consistently reproduce this?

Does "python -c 'import time; time.gmtime(time.time())'" ?