<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/89629>89629</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Nondeterminism in llvm-libc++-static.cfg.in :: std/time/time.zone/time.zone.timezone/time.zone.members/sys_info.zdump.pass.cpp
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            bug,
            libc++
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          ilovepi
      </td>
    </tr>
</table>

<pre>
    We're seeing some non-deterministic failures in llvm-libc++-static.cfg.in :: std/time/time.zone/time.zone.timezone/time.zone.members/sys_info.zdump.pass.cpp in our CI (https://ci.chromium.org/ui/p/fuchsia/builders/toolchain.ci/clang-linux-x64/b8750473375533143361/overview).

It's unclear why this is happening, and why sometimes this test passes w/o any (known) changes to our CI configuration/infrastructure or to libcxx.

This appears related to https://github.com/llvm/llvm-project/commit/1fda1776e32b5582bfcfcbd8094f3c280d936cec, so I'm CCing @mordante.

Below is the failing diff, which are only different in 2 lines.
```
# | libcxx
# | ...
# | America/Ciudad_Juarez  Sun Feb  5 06:59:59 1939 UT = Sat Feb  4 23:59:59 1939 MST isdst=0 gmtoff=-25200
# | America/Ciudad_Juarez  Sun Feb  5 07:00:00 1939 UT = Sun Feb  5 01:00:00 1939 CST isdst=0 gmtoff=-21600
# | ...
```
vs.
```
# | zdump
# | ...
# | America/Ciudad_Juarez Fri Apr  1 06:59:59 1932 UT = Thu Mar 31 23:59:59 1932 MST isdst=0 gmtoff=-25200
# | America/Ciudad_Juarez  Fri Apr  1 07:00:00 1932 UT = Fri Apr  1 01:00:00 1932 CST isdst=0 gmtoff=-21600
# | ...
```

</pre>
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