Bug summary

Assuming that #31751 is fixed, the macOS backend will still leak the NSTrackingArea created in FigureCanvas_init.

Code for reproduction

import matplotlib.pyplot as plt
plt.subplots()
plt.show()

Actual outcome

A NSTrackingArea object has a retainCount of +2. After the view hierarchy is dealloc'd, the retainCount is still +1.

Expected outcome

The NSTrackingArea is freed when the view hierarchy is freed.

Additional information

No response

Operating system

macOS 14.7

Matplotlib Version

0.2.0.dev54528+unknown.gf4cf12592.d20260526

Matplotlib Backend

No response

Python version

No response

Jupyter version

No response

Installation

None