Bug report

Bug summary

Because Spine is mostly written for rectilinear axes, calling some seemingly harmless methods on polar spines can completely mess up their positioning.

Code for reproduction

frompylabimport*polar()print(gca().spines["polar"].get_position())show()

or

frompylabimport*;polar();print(gca().spines["polar"].get_spine_transform())

Actual outcome

Expected outcome

The spine stays correct, or at least the get_foo getter raises an exception.

Matplotlib version

• Operating system: linux
• Matplotlib version: head
• Matplotlib backend (print(matplotlib.get_backend())): qt5agg
• Python version: 38
• Jupyter version (if applicable):
• Other libraries: