Memory Leak in Python with PyQt and OpenNMT CTranslate

memory_leak.py

from PyQt5.QtWidgets import QMainWindow, QApplication
from PyQt5.QtCore import QThread
import ctranslate2

class WorkerThread(QThread):
    def __del__(self):
        self.wait()

    def run(self):
        translator = ctranslate2.Translator('/path/to/ctranslate/model')

class GUIWindow(QMainWindow):
    def translate(self):
        new_worker_thread = WorkerThread()
        new_worker_thread.start()

app = QApplication([])
main_window = GUIWindow()
main_window.show()

for i in range(120):
    print(i)
    main_window.translate()

app.exec_()