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  1. Qt
  2. QTBUG-127598

GCC's libstdc++ supplies QTimeZone's tzdb backend with bad data

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Details

    • Bug
    • Resolution: Unresolved
    • P4: Low
    • None
    • 6.9
    • Core: Date/Time
    • None
    • Linux/X11

    Description

      As reported upstream the zic parsing code of libstdc++ makes some mistakes, using UTC times where it should use zone times, in determining the times of transitions. This ticket is here mainly to keep track of the upstream ticket and be referenced by each QEXPECT_FAIL() related to that issue. Hopefully these last can have their #if-ery tweaked once it's fixed upstream and later be removed once libstdc++ version 14 is ancient history.

      We'll also need to update qtbase/src/corelib/doc/src/cpp20-overview.qdoc's comments on feature timezone_tzdb being experimental, once this is resolved.

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        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-131677 Surprising conversion of QDateTime to std::chrono.

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          resulted from

          Task - A task that needs to be done. QTBUG-68812 A new back-end for QTimeZone based on C++20 std::chrono::tzdb

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
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              Eddy Edward Welbourne
              Eddy Edward Welbourne
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              Dates

                Created:
                Updated:

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