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  1. Qt
  2. QTBUG-102971

Something fishy going on on MinGW with QML Date

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Details

    • Windows
    • 21
    • dff02466a0 (qt/qtdeclarative/dev) 3033e99fa8 (qt/qtdeclarative/6.4) 3033e99fa8 (qt/tqtc-qtdeclarative/6.4)
    • Team A Foundation Sprint 59

    Description

      Originally reported as a re-opening of QTBUG-78996 by peppe. Moved here because it is a separate bug.
      My computer local timezone is set to CEST.

      This snippet:

              let i = 0;
        console.log("Row", ++i, new Date(Date.UTC(2021, 6)))
        console.log("Row", ++i, new Date(Date.UTC(2021, 7, 0)))

        console.log("Row", ++i, new Date(Date.UTC(2021, 6)).getDate())
        console.log("Row", ++i, new Date(Date.UTC(2021, 7, 0)).getDate())

        console.log("Row", ++i, new Date(2021, 6))
        console.log("Row", ++i, new Date(2021, 7, 0))

        console.log("Row", ++i, new Date(2021, 6).getDate())
        console.log("Row", ++i, new Date(2021, 7, 0).getDate())

      On MSVC prints:

      qml: Row 1 Thu Jul 1 02:00:00 2021 GMT+0200
qml: Row 2 Sat Jul 31 02:00:00 2021 GMT+0200
qml: Row 3 1
qml: Row 4 31
qml: Row 5 Thu Jul 1 00:00:00 2021 GMT+0200
qml: Row 6 Sat Jul 31 00:00:00 2021 GMT+0200
qml: Row 7 1
qml: Row 8 31

      And on MinGW prints:

      qml: Row 1 Thu Jul 1 02:00:00 2021 GMT+0100
qml: Row 2 Sat Jul 31 02:00:00 2021 GMT+0100
qml: Row 3 1
qml: Row 4 31
qml: Row 5 Thu Jul 1 00:00:00 2021 GMT+0100
qml: Row 6 Sat Jul 31 00:00:00 2021 GMT+0100
qml: Row 7 30
qml: Row 8 30

       

      If I dump QDateTime::currentDateTime, on both compilers I get

      QDateTime(2021-07-14 20:53:49.858 Romance Daylight Time Qt::LocalTime)

      So, 1) why is the timezone off by 1 hour when using MinGW?
      And 2) why does it think that July has 30 days?

      Attachments

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-95993 QML Date operations are wrong when DST is active

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-100014 tst_qqmlqt fails on Android

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          split from

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-78996 JavaScript getDay() regression on MinGW

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Activity

            People

              Eddy Edward Welbourne
              Eddy Edward Welbourne
              Vladimir Minenko Vladimir Minenko
              Alex Blasche Alex Blasche
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              1 Vote for this issue
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              Dates

                Created:
                Updated:
                Resolved: