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  1. Qt
  2. QTBUG-91386

QJsonDocument::fromJson() not working with very big integers

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    • Icon: Bug Bug
    • Resolution: Invalid
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    • None
    • 5.12
    • Core: Other
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      I have found a bug in QJsonDocument::fromJson()
      Parsing following JSON string will not work!

      {"io219":4051331153808338998,"io220":3906362710332355891,"io221":3546361733327093760}

      Example program:

      QJsonObject attributs = QJsonDocument::fromJson("{\"io219\":4051331153808338998,\"io220\":3906362710332355891,\"io221\":3546361733327093760}");

qDebug() << "io219 is" << quint64(attributs.value("io219").toDouble());
qDebug() << "io220 is" << quint64(attributs.value("io220").toDouble());
qDebug() << "io221 is" << quint64(attributs.value("io221").toDouble());

      This code will returns:

      io219 is 4051331153808338944
io220 is 3906362710332356096
io221 is 3546361733327093760

      Only io221 value is correct!

      I understand the problem, but with actual QJson implementation, there is no way to get the correct value, because attributs.value("io220").toString() will returns an empty string.

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            thiago Thiago Macieira
            kromignon Fabrice Mousset
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              Created:
              Updated:
              Resolved:

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