ASSERT: "it.isUnused()" in file /home/qt/work/install/include/QtCore/qhash.h, line 525

#include <QCoreApplication>
#include <QHash>
#include <QDebug>


struct TranslatorMessageContentPtr {
    explicit TranslatorMessageContentPtr(const QString &msg)
    {
        ptr = &msg;
    }

    inline const QString *content() const
    {
        return ptr;
    }

    const QString *ptr;
};

inline size_t qHash(TranslatorMessageContentPtr tmp)
{
    return qHash(*tmp.content());
}

inline bool operator==(TranslatorMessageContentPtr tmp1, TranslatorMessageContentPtr tmp2)
{
    return *tmp1.content() == *tmp2.content();
}

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QList<QString> m_messages;
    for (int i = 0; i < 300; ++i) {
        if (i == 8) {
            // create duplicate at position 8
            m_messages.append(m_messages[0]);
        } else {
            m_messages.append(QString("Message %1").arg(i));
        }
    }

    QHash<TranslatorMessageContentPtr, int> contentRefs;
    for (int i = 0; i < m_messages.count(); ) {
        const QString &msg = m_messages.at(i);
        {
            QHash<TranslatorMessageContentPtr, int>::ConstIterator it =
                    contentRefs.constFind(TranslatorMessageContentPtr(msg));
            if (it != contentRefs.constEnd()) {
                // dupe found, remove message by index
                m_messages.removeAt(i);
                continue;
            }
        }

        contentRefs[TranslatorMessageContentPtr(msg)] = i;
        ++i;
    }
    return a.exec();
}