[tz] Wrong zdump output in timezone-2021e

[Danilo Spinella]

Hi everyone!

I have encountered a strange behaviour in zdump in the latest version
of timezone (timezone-2021e).

Previous output of version timezone-2021a:

# zdump Europe/Copenhagen -v -c 2022,2023 | grep isdst
Europe/Copenhagen  Sun Mar 27 00:59:59 2022 UT = Sun Mar 27 01:59:59
2022 CET isdst=0 gmtoff=3600
Europe/Copenhagen  Sun Mar 27 01:00:00 2022 UT = Sun Mar 27 03:00:00
2022 CEST isdst=1 gmtoff=7200
Europe/Copenhagen  Sun Oct 30 00:59:59 2022 UT = Sun Oct 30 02:59:59
2022 CEST isdst=1 gmtoff=7200
Europe/Copenhagen  Sun Oct 30 01:00:00 2022 UT = Sun Oct 30 02:00:00
2022 CET isdst=0 gmtoff=3600

Current output with timezone-2021e:

# zdump Europe/Copenhagen -v -c 2022,2023 | grep isdst
Europe/Copenhagen  -67768040609743820 = Thu Jan  1 00:00:00 -2147481748
LMT isdst=0 gmtoff=3020
Europe/Copenhagen  -67768040609740801 = Thu Jan  1 00:50:19 -2147481748
LMT isdst=0 gmtoff=3020
Europe/Copenhagen  Thu Jan  1 00:00:00 -2147481748 UT = Thu Jan  1
00:50:20 -2147481748 LMT isdst=0 gmtoff=3020
Europe/Copenhagen  Sun Mar 27 00:59:59 2022 UT = Sun Mar 27 01:59:59
2022 CET isdst=0 gmtoff=3600
Europe/Copenhagen  Sun Mar 27 01:00:00 2022 UT = Sun Mar 27 03:00:00
2022 CEST isdst=1 gmtoff=7200
Europe/Copenhagen  Sun Oct 30 00:59:59 2022 UT = Sun Oct 30 02:59:59
2022 CEST isdst=1 gmtoff=7200
Europe/Copenhagen  Sun Oct 30 01:00:00 2022 UT = Sun Oct 30 02:00:00
2022 CET isdst=0 gmtoff=3600
Europe/Copenhagen  Wed Dec 31 22:59:59 2147485547 UT = Wed Dec 31
23:59:59 2147485547 CET isdst=0 gmtoff=3600

I consider this a bug due to the strange values printed by zdump.
I have tested zdump in different distributions and they are all
affected. Can you please confirm?

-- 
Best Regards,
Danilo Spinella
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