QGIS » QGIS Application

I got a crash when I used the python console to test some code. I attach below the code, simplified as much as possible to keep the entire crash reproductibility. It reproduces consistently in my QGIS 3.0.2 installation. The crash does not happen if the print function calls are removed.

Steps to reproduce:
1. Without opening any project, open directly Plugins>Python console
2. Paste the following code

class MyTable(QWidget):
  elements = []
  def __init__(self, parent = None):
    QWidget.__init__(self, parent)
    self.layout = QVBoxLayout()
    self.setLayout(self.layout)
    self.button = QPushButton()
    self.button.setText('Find')
    self.button.clicked.connect(self.printElementWithFocus)
    self.layout.addWidget(self.button)
    self.addElement(0)
  def findElementWithFocus(self):
    for i, element in enumerate(self.elements):
      for child in element.findChildren(QWidget):
        if child is self.focusWidget():
          return i
  def printElementWithFocus(self):
    print(self.focusWidget(), self.findElementWithFocus())
    print(self.elements[0],self.elements[0].hasFocus())
  def addElement(self, index):
    element = QLineEdit()
    self.elements.append(element)
    self.layout.insertWidget(0, element)

dialog = QDialog()
layout = QGridLayout()
dialog.setLayout(layout)
layout.addWidget(MyTable(), 0, 1, 1, 1)
dialog.exec()

3. A dialog opens
4. Press the enter key and keep it pressed
5. In about 3 seconds, QGis crashes and Windows displays the message:

qgis-bin-g7.4.0.exe stopped working