hi, yes, version 2024b-0ubuntu0.20.04.1 look fine! -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to tzdata in Ubuntu. https://bugs.launchpad.net/bugs/2096974
Title: tzdata-2024b-0ubuntu0.24.04 makes std::chrono unusable Status in gcc-14 package in Ubuntu: Confirmed Status in tzdata package in Ubuntu: Triaged Status in waybar package in Ubuntu: New Status in gcc-14 source package in Focal: New Status in tzdata source package in Focal: Fix Committed Status in waybar source package in Focal: New Status in gcc-14 source package in Jammy: New Status in tzdata source package in Jammy: Fix Committed Status in waybar source package in Jammy: New Status in gcc-14 source package in Noble: New Status in tzdata source package in Noble: Fix Released Status in waybar source package in Noble: New Status in gcc-14 source package in Oracular: New Status in tzdata source package in Oracular: Fix Released Status in waybar source package in Oracular: New Bug description: [ Impact ] The latest tzdata SRU[1] included a change[2] in the main data form: The main source files' time zone abbreviations now use %z, supported by zic since release 2015f and used in vanguard form since release 2022b. For example, America/Sao_Paulo now contains the zone continuation line "-3:00 Brazil %z", which is less error prone than the old "-3:00 Brazil -03/-02". This does not change the represented data: the generated TZif files are unchanged. Rearguard form still avoids %z, to support obsolescent parsers. Turns out the standard c++ library in at least oracular and noble fail to parse that, resulting in a much small list of available timezones, or even crashes[3]. The c++ fix for that is in [4]. That might be eventually SRUed, but at the moment it's quicker to adjust tzdata than the c++ library. Also, there might be other parsers in the supported Ubuntu releases that are also affected, and just haven't been noticed yet. 1. https://launchpad.net/bugs/2070285 2. https://github.com/eggert/tz/commit/94e6b3b0eb773e66a9ac49b905c69c0fa6a31dc3 3. https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/2096974/comments/10 4. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116657 [ Test Plan ] This update includes a new DEP8 test that checks specifically for this bug. Therefore, the test plan is to observe that the full suite of autopkgtests is run and that it passed. For jammy and focal, which do not contain the c++ library function that is failing, build this small C++ app in *NOBLE*: #include <chrono> #include <iostream> int main() { for (const auto & time_zone : std::chrono::get_tzdb().zones) { std::cout << time_zone.name() << std::endl; } } Build and link statically, like so (assuming the file is called test.cpp): g++ -std=c++20 -o test test.cpp -static Then copy the resulting binary ("test") to the jammy and focal systems under test. An affected system will show just two timezones: $ ~/test Etc/GMT Etc/UTC Whereas a fixed system will show hundreds. [ Where problems could occur ] All software that use tzdata could be affected by this update. There is probably at least one implementation in each programming language for reading the timezone data. The update could trigger parser bugs. The autopkgtest will cover Python's zoneinfo and now C++ std::chrono. [ Original Description ] inalling tzdata in version 2024b-0ubuntu0.24.04 causes std::chrono to deliver only 2 timezones: code: for (const auto & time_zone : std::chrono::get_tzdb().zones) { std::cout << time_zone.name() << std::endl; } output: Etc/GMT Etc/UTC To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gcc-14/+bug/2096974/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
