I was playing with the path editor example and found that with QtAgg if I resize the window I get

QWidget::repaint: Recursive repaint detected
QWidget::paintEngine: Should no longer be called
QPainter::begin: Paint device returned engine == 0, type: 1
QPainter::end: Painter not active, aborted
Segmentation fault (core dumped)

Removing the blit line from draw as proposed at #11431 fixes this for me. TkAgg works fine whether the blit line is there or not.

I am on Ubuntu 22.04 and tested this with main.

Originally posted by @rcomer in #11431 (comment)