QBackingStore::endPaint() called with active painter; did you forget to destroy it or call QPainter::end() on it?

[f2d73]

orange@orange-HP-ProBook-440-G5:~/Documents/labelGo-Yolov5AutoLabelImg$ python3 labelGo.py
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
Traceback (most recent call last):
File "/home/orange/Documents/labelGo-Yolov5AutoLabelImg/libs/canvas.py", line 506, in paintEvent
p.drawLine(self.prev_point.x(), 0, self.prev_point.x(), self.pixmap.height())
TypeError: arguments did not match any overloaded call:
drawLine(self, QLineF): argument 1 has unexpected type 'float'
drawLine(self, QLine): argument 1 has unexpected type 'float'
drawLine(self, int, int, int, int): argument 1 has unexpected type 'float'
drawLine(self, QPoint, QPoint): argument 1 has unexpected type 'float'
drawLine(self, Union[QPointF, QPoint], Union[QPointF, QPoint]): argument 1 has unexpected type 'float'
QBackingStore::endPaint() called with active painter; did you forget to destroy it or call QPainter::end() on it?
QBackingStore::endPaint() called with active painter; did you forget to destroy it or call QPainter::end() on it?
QPainter::begin: Painter already active
Segmentation fault (core dumped)