[Bug 2096974] Re: tzdata-2024b-0ubuntu0.24.04 makes std::chrono unusable

[Benjamin Drung]

Test results:

* plucky 2024b-6ubuntu1 is NOT affected
* oracular 2024b-1ubuntu2.1 is affected
* noble 2024b-0ubuntu0.24.04 is affected
* jammy fails to compile the example code:

error: ‘get_tzdb’ is not a member of ‘std::chrono’
    6 |     for (const auto & time_zone : std::chrono::get_tzdb().zones) {
      |                                                ^~~~~~~~

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Title:
  tzdata-2024b-0ubuntu0.24.04 makes std::chrono unusable

Status in tzdata package in Ubuntu:
  Triaged

Bug 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

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