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  1. Qt
  2. QTBUG-90456

Array manipulation destroys objects in array

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    • 64777c3ed9dc66e3510ce2139538b93ad68e9fbb (qt/qtdeclarative/dev) c8810492c204546ad12c0635fd72b649fe563097 (qt/qtdeclarative/6.2)

      Consider the following code snippet:

          QString code(QStringLiteral(R"QBS(
            var test = ['val2'];
            test.unshift('val1');
            test = test.concat([]);
            throw(JSON.stringify(test));
    )QBS"));
    QJSEngine e;
    QJSValue v = e.evaluate(code);
    qDebug() << v.toString();

      The output is:

      "[\"val1\",null]"

      I was not able to reduce it further. The array can be initialized like above or filled with push. But it must contain something before doing unshift followed by an empty concat.

        For Gerrit Dashboard: QTBUG-90456
        # Subject Branch Project Status CR V
        361439,4 JS: Ensure that array keeps valid after length changes and fix concat dev qt/qtdeclarative Status: MERGED +2 0
        362056,2 JS: Ensure that array keeps valid after length changes and fix concat 6.2 qt/qtdeclarative Status: MERGED +2 0

            fabiankosmale Fabian Kosmale
            rweickelt Richard Weickelt
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              Created:
              Updated:
              Resolved:

                There are no open Gerrit changes