[Bug]: FigureCanvasTkAgg call creates memory leak #22858

from tkinter import *
from matplotlib.figure import Figure
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
import tracemalloc
import gc


def repeat(n, fig, root):
    for i in range(n):
        agg = FigureCanvasTkAgg(fig, root).get_tk_widget()
        agg.destroy()
        del agg
        gc.collect()


def main():
    root = Tk()
    root.geometry("300x300+0+0")
    fig = Figure(dpi=200)

    tracemalloc.start()
    tracemalloc.clear_traces()

    print(tracemalloc.get_traced_memory())
    repeat(10, fig, root)
    print(tracemalloc.get_traced_memory())

    tracemalloc.clear_traces()
    print(tracemalloc.get_traced_memory())

    repeat(20, fig, root)
    print(tracemalloc.get_traced_memory())

    tracemalloc.clear_traces()
    print(tracemalloc.get_traced_memory())

    repeat(30, fig, root)
    print(tracemalloc.get_traced_memory())

    tracemalloc.clear_traces()
    print(tracemalloc.get_traced_memory())

    root.mainloop()


if __name__ == "__main__":
    main()