app crashes again

[sophister]

Hi again, I'm faced with the second application's crash.
Here is my code:

void DishManager::initPage1()
{
    ui.p1FamilyComboBox->addItems(dishes->getFamilies());
}

void DishManager::initPage1()
{
    ui.p1FamilyComboBox->addItems(dishes->getFamilies());
}

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where p1FamilyComboBox is a instance of

QComboBox

QComboBox

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, and dishes is an instance of the following class Record.

const QStringList& Record::getDishNamesByFamily(const QString &family) const
{
    QStringList names;
    for(int i = 0; i < dishes.size(); i++)
    {
        if(dishes[i].getFamily() == family)
        {
            names << dishes[i].getName();  //如果某菜谱属于此菜系，则加入其菜名
        }
    }
    return names;
}

const QStringList& Record::getDishNamesByFamily(const QString &family) const
{
    QStringList names;
    for(int i = 0; i < dishes.size(); i++)
    {
        if(dishes[i].getFamily() == family)
        {
            names << dishes[i].getName();  //如果某菜谱属于此菜系，则加入其菜名
        }
    }
    return names;
}

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I think maybe it's due to the

const QStringList& Record::getDishNamesByFamily

const QStringList& Record::getDishNamesByFamily

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Is there anything wrong with the returning value.
Thanks in advance!!