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  1. Qt
  2. QTBUG-59061

QDateTime::addDays() does not work properly with UTC

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Details

    • Bug
    • Resolution: Done
    • P2: Important
    • 5.9.0 Beta 2
    • 5.8.0
    • Core: Date/Time
    • None
    • Windows 10, mingw5.3.0, Qt5.8, mscv2015-32bit
    • 07fffa60103fed42efed86f928fcec30f9d98815

    Description

      Upto QT 5.7 the fowllowing code works fine:

          QDateTime dt              = QDateTime::fromString("2016-12-12T07:00:00", Qt::ISODate).toUTC();
    QDateTime nextDateTime    = dt.addDays(9);
    QDateTime expected        = QDateTime::fromString("2016-12-21T07:00:00", Qt::ISODate).toUTC();
    QVERIFY(nextDateTime==expected);

      nextDateTime is 01.01.1970 00:16:05:873 after the addDays!

      since Qt 5.8 this test fails under Windows with mingw5.3.0 (32bit), mscv2015-32bit. On all other 64 bit test plattforms (Linux, MAC, MSCV2015-64) no fail.

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            thiago Thiago Macieira
            bacher Andreas Bacher
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            Dates

              Created:
              Updated:
              Resolved:

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