Issue

What were you trying to do that didn't work? TL;DR The tzdata package provided in Centos 8 has additional transitions in a variety of zoneinfo files that are invalid. Europe/London is an example where there is a transition from GMT -> GMT -> BST. This is impossible as you can only transition from GMT -> BST -> GMT. When I compare the total number of transitions in el8 vs el9 there is 2 extra transitions. 1 for LMT (local mean time) which can be there but is not necessary. (Ok to be there). 1 extra transition for GMT -> GMT which is invalid. Full list of zones with invalid transitions detected in el8 package: Africa/Ceuta America/Barbados America/Matamoros America/Monterrey America/Rainy_River America/Winnipeg Antarctica/Macquarie Arctic/Longyearbyen Asia/Baku Asia/Gaza Asia/Hebron Asia/Istanbul Asia/Samarkand Asia/Tashkent Asia/Tbilisi Asia/Yerevan Atlantic/Jan_Mayen Australia/ACT Australia/Adelaide Australia/Brisbane Australia/Broken_Hill Australia/Canberra Australia/Currie Australia/Eucla Australia/Hobart Australia/Lindeman Australia/Melbourne Australia/NSW Australia/Perth Australia/Queensland Australia/South Australia/Sydney Australia/Tasmania Australia/Victoria Australia/West Australia/Yancowinna Canada/Central Eire Etc/GMT+1 Etc/GMT-1 Etc/GMT+10 Etc/GMT-10 Etc/GMT+11 Etc/GMT-11 Etc/GMT+12 Etc/GMT-12 Etc/GMT-13 Etc/GMT-14 Etc/GMT+2 Etc/GMT-2 Etc/GMT+3 Etc/GMT-3 Etc/GMT+4 Etc/GMT-4 Etc/GMT+5 Etc/GMT-5 Etc/GMT+6 Etc/GMT-6 Etc/GMT+7 Etc/GMT-7 Etc/GMT+8 Etc/GMT-8 Etc/GMT+9 Etc/GMT-9 Europe/Amsterdam Europe/Belfast Europe/Belgrade Europe/Berlin Europe/Bratislava Europe/Brussels Europe/Bucharest Europe/Budapest Europe/Chisinau Europe/Copenhagen Europe/Dublin Europe/Guernsey Europe/Isle_of_Man Europe/Istanbul Europe/Jersey Europe/Kiev Europe/Kyiv Europe/Ljubljana Europe/London Europe/Luxembourg Europe/Madrid Europe/Minsk Europe/Oslo Europe/Podgorica Europe/Prague Europe/Riga Europe/Rome Europe/San_Marino Europe/Sarajevo Europe/Simferopol Europe/Skopje Europe/Sofia Europe/Stockholm Europe/Tallinn Europe/Tiraspol Europe/Uzhgorod Europe/Vatican Europe/Vienna Europe/Vilnius Europe/Warsaw Europe/Zagreb Europe/Zaporozhye GB GB-Eire Pacific/Norfolk Poland Turkey Raw Data of an invalid transition for Europe/London: Perl script to reproduce this issue: Note first explode el8 and el9 rpm into the same directory into usr_el8 and usr_el9 for comparison ** #!/usr/bin/env perl use strict; use warnings; use Data::Dumper; use Test::Deep; use Time::Tzfile; my @zones = ("Europe/London"); open(my $fh,"> el8.out"); open(my $hh,"> el9.out"); foreach my $zone (@zones) { print $zone . "\n"; # get an unassembled raw parse of the file my $tzdata_el8 = Time::Tzfile->parse( { filename => 'usr_el8/share/zoneinfo/' . $zone }); print $fh Dumper($tzdata_el8); my $tzdata_el9 = Time::Tzfile->parse({ filename => 'usr_el9/share/zoneinfo/' . $zone }); print $hh Dumper($tzdata_el9); my @el8_types = (); foreach my $json (@{$tzdata_el8}) { push @el8_types, $json->\{'type'}; } my @el9_types = (); foreach my $json (@{$tzdata_el9}) { push @el9_types, $json->\{'type'}; } my $el8_count = scalar(@el8_types); my $el9_count = scalar(@el9_types); cmp_deeply($el8_count, $el9_count); cmp_deeply(@el8_types, @el9_types); } close $fh; close $hh; h3. Please provide the package NVR for which bug is seen: h3. How reproducible: h3. Dump the Europe/London zoneinfo file for both el8 and el9 and compare. Perl script to reproduce this issue. Will produce two output files for el8 and el9. ** Note first explode el8 and el9 rpm into the same directory into usr_el8 and usr_el9 for comparison ** #!/usr/bin/env perl use strict; use warnings; use Data::Dumper; use Test::Deep; use Time::Tzfile; my @zones = ("Europe/London"); open(my $fh,"> el8.out"); open(my $hh,"> el9.out"); foreach my $zone (@zones) { print $zone . "\n"; # get an unassembled raw parse of the file my $tzdata_el8 = Time::Tzfile->parse({ filename => 'usr_el8/share/zoneinfo/' . $zone } ); print $fh Dumper($tzdata_el8); my $tzdata_el9 = Time::Tzfile->parse( { filename => 'usr_el9/share/zoneinfo/' . $zone } ); print $hh Dumper($tzdata_el9); my @el8_types = (); foreach my $json (@{$tzdata_el8}) { push @el8_types, $json->\{'type'} ; } my @el9_types = (); foreach my $json (@{$tzdata_el9}) { push @el9_types, $json->\{'type'} ; } my $el8_count = scalar(@el8_types); my $el9_count = scalar(@el9_types); cmp_deeply($el8_count, $el9_count); cmp_deeply(@el8_types, @el9_types); } close $fh; close $hh; Steps to reproduce Download el8 and el9 rpm package and explode contents in usr_el8 and usr_el9 Install required libraries: cpan install Time::Tzfile cpan install Test::Deep Run the above perl script Compare the el8.out and el9.out output files See duplicates only found in el8 for Europe/London: { 'type' => 'BST', 'offset' => 3600, 'epoch' => 796179600, 'is_dst' => 1 } , { 'type' => 'GMT', 'is_dst' => 0, 'offset' => 0, 'epoch' => 814323600 } , { 'offset' => 0, 'epoch' => 820454400, 'is_dst' => 0, 'type' => 'GMT' } , { 'type' => 'BST', 'is_dst' => 1, 'epoch' => 828234000, 'offset' => 3600 } , Note the invalid transition GMT -> GMT which does not appear in the el9 file. Repeat this process for the full list of zoneinfo files that have the same problem: Africa/Ceuta America/Barbados America/Matamoros America/Monterrey America/Rainy_River America/Winnipeg Antarctica/Macquarie Arctic/Longyearbyen Asia/Baku Asia/Gaza Asia/Hebron Asia/Istanbul Asia/Samarkand Asia/Tashkent Asia/Tbilisi Asia/Yerevan Atlantic/Jan_Mayen Australia/ACT Australia/Adelaide Australia/Brisbane Australia/Broken_Hill Australia/Canberra Australia/Currie Australia/Eucla Australia/Hobart Australia/Lindeman Australia/Melbourne Australia/NSW Australia/Perth Australia/Queensland Australia/South Australia/Sydney Australia/Tasmania Australia/Victoria Australia/West Australia/Yancowinna Canada/Central Eire Etc/GMT+1 Etc/GMT-1 Etc/GMT+10 Etc/GMT-10 Etc/GMT+11 Etc/GMT-11 Etc/GMT+12 Etc/GMT-12 Etc/GMT-13 Etc/GMT-14 Etc/GMT+2 Etc/GMT-2 Etc/GMT+3 Etc/GMT-3 Etc/GMT+4 Etc/GMT-4 Etc/GMT+5 Etc/GMT-5 Etc/GMT+6 Etc/GMT-6 Etc/GMT+7 Etc/GMT-7 Etc/GMT+8 Etc/GMT-8 Etc/GMT+9 Etc/GMT-9 Europe/Amsterdam Europe/Belfast Europe/Belgrade Europe/Berlin Europe/Bratislava Europe/Brussels Europe/Bucharest Europe/Budapest Europe/Chisinau Europe/Copenhagen Europe/Dublin Europe/Guernsey Europe/Isle_of_Man Europe/Istanbul Europe/Jersey Europe/Kiev Europe/Kyiv Europe/Ljubljana Europe/London Europe/Luxembourg Europe/Madrid Europe/Minsk Europe/Oslo Europe/Podgorica Europe/Prague Europe/Riga Europe/Rome Europe/San_Marino Europe/Sarajevo Europe/Simferopol Europe/Skopje Europe/Sofia Europe/Stockholm Europe/Tallinn Europe/Tiraspol Europe/Uzhgorod Europe/Vatican Europe/Vienna Europe/Vilnius Europe/Warsaw Europe/Zagreb Europe/Zaporozhye GB GB-Eire Pacific/Norfolk Poland Turkey Expected results Transitions in the el8 zoneinfo files should be valid and only contain transitions that are accurate e.g. GMT -> BST -> GMT not GMT -> GMT -> BST. Actual results Transitions are invalid in the el8 zoneinfo files listed above and contain extra transitions that are not found in the el9 package.

Release Notes

No. of Comments

Resolution

Not a Bug