QFileDialog failed by ueing Keyboard

[ckvsoft]

Hi

I'm using QT5 from Ubuntu 16.04 and have troubles when i use the keyboard.
Qt Version 5.5.1.

When i select all Buttons or Files with the Mouse it works fine, but when i to the work with the Keyboard and press Enter i got a SIGSEGV
by using getSaveFileName. getExistingDirectory works fine.


The inferior stopped because it received a signal from the operating system.
Signal name : SIGSEGV
Signal meaning : Segmentation fault

void ExportDialog::onExportButton_clicked()
{
    QSettings settings(QSettings::IniFormat, QSettings::UserScope, "XX", "XX");
    QString lastUsedDirectory = settings.value("lastUsedDirectory", QDir::currentPath()).toString();
 
    if (m_saveTodir) {
        m_filename = QFileDialog::getExistingDirectory(this, tr("Save to ..."),lastUsedDirectory);
    } else {
        m_filename = QFileDialog::getSaveFileName(this, tr("save"), lastUsedDirectory, "CSV (*.csv)");
    }
 
    if (m_filename.isNull())
        return;
 
    settings.setValue("lastUsedDirectory", m_filename);
 
    QDialog::accept();
 
}

void ExportDialog::onExportButton_clicked()
{
    QSettings settings(QSettings::IniFormat, QSettings::UserScope, "XX", "XX");
    QString lastUsedDirectory = settings.value("lastUsedDirectory", QDir::currentPath()).toString();

    if (m_saveTodir) {
        m_filename = QFileDialog::getExistingDirectory(this, tr("Save to ..."),lastUsedDirectory);
    } else {
        m_filename = QFileDialog::getSaveFileName(this, tr("save"), lastUsedDirectory, "CSV (*.csv)");
    }

    if (m_filename.isNull())
        return;

    settings.setValue("lastUsedDirectory", m_filename);

    QDialog::accept();

}

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Can you tell me what i'm doing wrong?