Adding pie chart via external axes method

Hello,

I have been using returnfig=True and adding a couple of things to customise my chart, but when adding a pie chart I recieve the follow error:

ValueError: Image size of 65243x662049 pixels is too large. It must be less than 2^16 in each direction.

I have tried reducing everything so that the pie chart can be as bareboned and as rudimentary as possible, but the result remains the same. I have been using the pie chart successfully in standard matplotlib so I feeling like it should be working and I am at a bit of a loss.

まず、returnfig=True、外部の Axes、円グラフを使用してエラーを再現し、その設定を動作する標準的な Matplotlib のケースと比較します。円グラフを追加しても画像が大きすぎるエラーが発生しなくなれば、問題は解決です。