#include <QLineEdit>
#include <QIcon>
#include <QApplication>

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

    QLineEdit lineEdit;
    QPixmap pixmap(16, 16);

    pixmap.fill(Qt::red);
    lineEdit.addAction(QIcon(pixmap), QLineEdit::TrailingPosition);

    pixmap.fill(Qt::green);
    lineEdit.addAction(QIcon(pixmap), QLineEdit::TrailingPosition);

    lineEdit.setClearButtonEnabled(true);
    lineEdit.setText("resize me please");
    lineEdit.show();

    return a.exec();
}

QWidget *QLineEditPrivate::addAction(QAction *newAction, QAction *before, QLineEdit::ActionPosition position, int flags)
{
    ...
    positionSideWidgets(); //side widget still hidden
    w->show();
    ...
}

void QLineEditPrivate::positionSideWidgets()
{
    ...
    if (e.widget->isVisible()) // QTBUG-39660
        widgetGeometry.moveLeft(widgetGeometry.left() + delta);
    ...