def test_canvas_reinit():
from matplotlib.backends.backend_qtagg import FigureCanvasQTAgg
called = False
def crashing_callback(fig, stale):
nonlocal called
fig.canvas.draw_idle()
called = True
fig, ax = plt.subplots()
fig.stale_callback = crashing_callback
# this should not raise
canvas = FigureCanvasQTAgg(fig)
fig.stale = True
assert called
