PyQt5 QThread Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)

Demosthenes Koptsis demosthenesk at
Wed Jun 30 12:26:19 BST 2021


i have a GUI with PyQt5. The GUI has a Form, 2 Buttons and a 
ProgressBar. I want to implement a start/wait thread with QThread. 
Unfortunately i get Process finished with exit code 139 (interrupted by 
signal 11: SIGSEGV) when i click Run button to run thread.


|# -*- coding: utf-8 -*- # Form implementation generated from reading ui 
file 'MainWindow.ui' # # Created by: PyQt5 UI code generator 5.15.4 # # 
WARNING: Any manual changes made to this file will be lost when pyuic5 
is # run again. Do not edit this file unless you know what you are 
doing. from PyQt5 import QtCore, QtGui, QtWidgets class Ui_Form(object): 
def setupUi(self, Form): Form.setObjectName("Form") Form.resize(400, 
138) self.btnRun = QtWidgets.QPushButton(Form) 
self.btnRun.setGeometry(QtCore.QRect(20, 20, 89, 25)) 
self.btnRun.setObjectName("btnRun") self.btnStop = 
QtWidgets.QPushButton(Form) self.btnStop.setGeometry(QtCore.QRect(20, 
60, 89, 25)) self.btnStop.setObjectName("btnStop") self.progressBar = 
self.progressBar.setGeometry(QtCore.QRect(20, 100, 371, 23)) 
self.progressBar.setProperty("value", 24) 
self.progressBar.setObjectName("progressBar") self.retranslateUi(Form) 
QtCore.QMetaObject.connectSlotsByName(Form) def retranslateUi(self, 
Form): _translate = QtCore.QCoreApplication.translate 
Form.setWindowTitle(_translate("Form", "Test Thread")) 
self.btnRun.setText(_translate("Form", "Run")) 
self.btnStop.setText(_translate("Form", "Stop")) |


When i click the Start button the application crashes with segmentation 


|from PyQt5.QtWidgets import * from PyQt5.QtCore import * from 
MainWindow import * import sys import time class MainWindow(QWidget, 
QThread): def __init__(self, parent=None): super(MainWindow, 
self).__init__(parent) self.ui = Ui_Form() self.ui.setupUi(self) #Init progressBar self.ui.progressBar.setValue(0) #Buttons 
self.ui.btnStop.clicked.connect(self.wait) def run(self): count = 0 
while count <= 100: count += 1 self.ui.progressBar.setValue(count) 
time.sleep(1) def center(self): # geometry of the main window qr = 
self.frameGeometry() # center point of screen cp = 
QDesktopWidget().availableGeometry().center() # move rectangle's center 
point to screen's center point qr.moveCenter(cp) # top left of rectangle 
becomes top left of window centering it self.move(qr.topLeft()) if 
__name__ == '__main__': app = QApplication(sys.argv) 
app.setAttribute(Qt.AA_DontShowIconsInMenus, False) w = MainWindow() # 
Disable maximize window button w.setWindowFlags(Qt.WindowCloseButtonHint 
| Qt.WindowMinimizeButtonHint) sys.exit(app.exec_()) 
--------------------------------------------------------------- |

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