什么是分段错误以及如何修复它？简单音频 + pyqt5

当我在 simpleaudio 中停止音乐时，Linux 终端立即显示“分段错误（内存映像刷新到磁盘）”，并且程序崩溃。

我的程序：

from PyQt5.QtWidgets import QApplication, QMainWindow, QSlider, QPushButton, QVBoxLayout, QWidget
from PyQt5.QtCore import Qt, QTimer
import sys
from threading import Thread
from time import sleep as wait
import simpleaudio as sa
from pydub import AudioSegment

class Program():
    def __init__(self):
        self.playing = False
        self.pos = 0
        self.length = 100000 # пока что оставим длину 100 секунд
        self.audio_file_path = "/home/nikkonst/Музыка/F-777 - Cosmic Blaster - 05 Hey Man.mp3"

    def play_level(self):
        self.playing = True
        Thread(target=self.play_level_thread, daemon=True).start()

    def play_level_thread(self):
        self.play_audio(self.audio_file_path)

        while self.playing and self.pos < self.length:
            self.pos += 10
            editor.update_timeline()
            wait(0.1)

    def play_audio(self, path):
        audio = AudioSegment.from_file(path)

        wav_file_path = "temp.wav"
        audio.export(wav_file_path, format="wav")

        wave_obj = sa.WaveObject.from_wave_file(wav_file_path)

        play_obj = wave_obj.play()

    def stop_audio(self):
        self.playing = False
        sa.stop_all() # ошибка здесь

class LevelEditor(QMainWindow):
    def __init__(self):
        super().__init__()
        self.program = Program()
        self.setWindowTitle("2D Level Editor")
        self.setGeometry(100, 100, 800, 600)

        self.central_widget = QWidget()
        self.setCentralWidget(self.central_widget)

        layout = QVBoxLayout()

        self.timeline_slider = QSlider(Qt.Horizontal)
        self.timeline_slider.setMaximum(1000)
        layout.addWidget(self.timeline_slider)

        self.play_button = QPushButton("Играть")
        self.play_button.clicked.connect(self.toggle_playback)
        layout.addWidget(self.play_button)

        self.stop_button = QPushButton("Остановить")
        self.stop_button.clicked.connect(self.stop_playback)
        layout.addWidget(self.stop_button)

        self.central_widget.setLayout(layout)

    def toggle_playback(self):
        self.timeline_slider.setMaximum(self.program.length)
        if not self.program.playing:
            print("playing")
            self.program.play_level()
            self.play_button.setText("Пауза")
        else:
            print("pause")
            self.program.stop_audio() # stop_audio будет стоять здесь недолго. вместо нее потом будет функция для паузы превью уровня
            self.play_button.setText("Играть")

    def stop_playback(self):
        print("stopping")
        if self.program.playing:
            self.program.stop_audio() # stop_audio будет стоять здесь недолго. вместо нее потом будет функция для остановки превью уровня
            self.timeline_slider.setValue(0)
            self.play_button.setText("Играть")

    def update_timeline(self):
        self.timeline_slider.setValue(self.program.pos)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    editor = LevelEditor()
    editor.show()
    sys.exit(app.exec_())