[DRE-maint] Bug#1034450: jekyll: autopkgtest fails on arm64 (in UTC+8 timezone): a document with a date with timezone should have the expected date

[Paul Gevers]

Source: jekyll
Version: 4.3.1+dfsg-1
Severity: serious
Control: tags -1 bookworm-ignore
User: debian-ci at lists.debian.org
Usertags: regression

Dear maintainer(s),

Your package has an autopkgtest, great. However, it fails on arm64 since 
mid 2022. I noticed that the two tests that failed are about timezones 
and our arm64 hosts are located in a UTC+8 timezone. Until 2023-04-13 
the hosts were also configured in their local timezone, but changing 
that to UTC didn't solve the problem. Can you please investigate the 
situation and fix it? I copied some of the output at the bottom of this 
report.

The release team has announced [1] that failing autopkgtest on amd64 and 
arm64 are considered RC in testing. [Release Team member hat on] Because 
we're currently in the hard freeze for bookworm, I have marked this bug 
as bookworm-ignore. Targeted fixes are still welcome.

More information about this bug and the reason for filing it can be 
found on 
https://wiki.debian.org/ContinuousIntegration/RegressionEmailInformation

Paul

[1] https://lists.debian.org/debian-devel-announce/2019/07/msg00002.html

https://ci.debian.net/data/autopkgtest/testing/arm64/j/jekyll/32926900/log.gz


Failure:
Minitest::Result#test_: a document with a date with timezone should have 
the expected date. 
[/tmp/autopkgtest-lxc.a_d0zzn9/downtmp/build.XLd/src/test/test_document.rb:627]
Minitest::Assertion: Expected: "2015/09/30"
   Actual: "2015/10/01"

Failure:
Minitest::Result#test_: a document with a date with timezone should 
return the expected date via Liquid. 
[/tmp/autopkgtest-lxc.a_d0zzn9/downtmp/build.XLd/src/test/test_document.rb:631]
Minitest::Assertion: Expected: "2015/09/30"
   Actual: "2015/10/01"
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