PyQt4退出时崩溃
窗口会显示出来，但在退出时崩溃了。错误报告显示在QtGui4.dll里发生了一些错误。
我的环境是PyQt4.10.4（Qt4.8.5）32位版本，运行在Windows 7（64位）上。有没有什么线索或者建议可以帮我找出发生了什么？非常感谢。
如果去掉一个或多个控件，崩溃就不会发生。真奇怪……
settings_window.ui
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>SettingWindow</class>
<widget class="QWidget" name="SettingWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>465</width>
<height>439</height>
</rect>
</property>
<property name="windowTitle">
<string>Form</string>
</property>
<widget class="QPushButton" name="pushButton">
<property name="geometry">
<rect>
<x>50</x>
<y>350</y>
<width>75</width>
<height>23</height>
</rect>
</property>
<property name="text">
<string>Save</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_2">
<property name="geometry">
<rect>
<x>180</x>
<y>350</y>
<width>75</width>
<height>23</height>
</rect>
</property>
<property name="text">
<string>Cancel</string>
</property>
</widget>
<widget class="QLabel" name="label_8">
<property name="geometry">
<rect>
<x>40</x>
<y>170</y>
<width>54</width>
<height>12</height>
</rect>
</property>
<property name="text">
<string>label</string>
</property>
</widget>
<widget class="QLineEdit" name="lineEdit_3">
<property name="geometry">
<rect>
<x>110</x>
<y>170</y>
<width>113</width>
<height>20</height>
</rect>
</property>
</widget>
<widget class="QLabel" name="label_9">
<property name="geometry">
<rect>
<x>40</x>
<y>230</y>
<width>54</width>
<height>12</height>
</rect>
</property>
<property name="text">
<string>TextLabel</string>
</property>
</widget>
<widget class="QLineEdit" name="lineEdit_4">
<property name="geometry">
<rect>
<x>120</x>
<y>220</y>
<width>113</width>
<height>20</height>
</rect>
</property>
</widget>
<widget class="QCheckBox" name="checkBox_4">
<property name="geometry">
<rect>
<x>140</x>
<y>300</y>
<width>71</width>
<height>16</height>
</rect>
</property>
<property name="text">
<string>CheckBox</string>
</property>
</widget>
<widget class="QLabel" name="label_11">
<property name="geometry">
<rect>
<x>120</x>
<y>190</y>
<width>54</width>
<height>12</height>
</rect>
</property>
<property name="text">
<string>TextLabel</string>
</property>
</widget>
<widget class="QLabel" name="label_12">
<property name="geometry">
<rect>
<x>130</x>
<y>250</y>
<width>54</width>
<height>12</height>
</rect>
</property>
<property name="text">
<string>TextLabel</string>
</property>
</widget>
<widget class="QWidget" name="layoutWidget">
<property name="geometry">
<rect>
<x>40</x>
<y>100</y>
<width>56</width>
<height>14</height>
</rect>
</property>
<layout class="QFormLayout" name="formLayout_2">
<property name="fieldGrowthPolicy">
<enum>QFormLayout::AllNonFixedFieldsGrow</enum>
</property>
<item row="0" column="0">
<widget class="QLabel" name="label_2">
<property name="text">
<string>label</string>
</property>
</widget>
</item>
</layout>
</widget>
<widget class="QWidget" name="layoutWidget">
<property name="geometry">
<rect>
<x>40</x>
<y>20</y>
<width>163</width>
<height>40</height>
</rect>
</property>
<layout class="QFormLayout" name="formLayout">
<property name="fieldGrowthPolicy">
<enum>QFormLayout::AllNonFixedFieldsGrow</enum>
</property>
<item row="0" column="0">
<widget class="QLabel" name="label">
<property name="text">
<string>label</string>
</property>
</widget>
</item>
<item row="0" column="1">
<widget class="QCheckBox" name="checkBox">
<property name="text">
<string>checkbox</string>
</property>
</widget>
</item>
<item row="1" column="1">
<widget class="QCheckBox" name="checkBox_2">
<property name="text">
<string>checkbox</string>
</property>
</widget>
</item>
</layout>
</widget>
</widget>
<resources/>
<connections/>
</ui>
settings_window.py
#-*- coding: utf-8 -*-
import sys
from PyQt4.QtGui import qApp, QDialog, QApplication
from ui_settings_window import Ui_SettingWindow
class SettingWindow(QDialog, Ui_SettingWindow):
def __init__(self):
super(SettingWindow, self).__init__()
self.setupUi(self)
if __name__ == "__main__":
app = QApplication(sys.argv)
window = SettingWindow()
window.show()
sys.exit(app.exec_())