[Bug 1312857] [NEW] Not constructing a QApplication before a QPaintDevice leads to core dumo

[MagnusPI]

Public bug reported:

I was playing with PyQt4.

1) Made a file named P2.py with
#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt4 import QtGui 

class P2(QtGui.QWidget):
    def __init__(s):
        super(P2,s).__init__()
#        print ">>>> dir(P2):", dir(P2)
        print "is initUI in dir()?", 'initUI' in dir()
        s.initUI()

    def initUI(s):
        s.setGeometry(300, 300, 250, 150)
        s.setWindowTitle('Icon')
        s.setWindowIcon(QtGui.QIcon('web.png'))        
        s.show()


2) Started python interpreter
3) Inside python I gave the following commands
>>> import P2
>>> q=P2.P2()
with the following result

QWidget: Must construct a QApplication before a QPaintDevice
Aborted (core dumped)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: python-qt4 4.10.4+dfsg-1ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CurrentDesktop: KDE
Date: Fri Apr 25 19:37:57 2014
InstallationDate: Installed on 2012-02-18 (796 days ago)
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: python-qt4
UpgradeStatus: Upgraded to trusty on 2014-04-20 (4 days ago)

** Affects: python-qt4 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1312857

Title:
  Not constructing a QApplication before a QPaintDevice leads to core
  dumo

Status in “python-qt4” package in Ubuntu:
  New

Bug description:
  I was playing with PyQt4.

  1) Made a file named P2.py with
  #!/usr/bin/python
  # -*- coding: utf-8 -*-

  import sys
  from PyQt4 import QtGui 

  class P2(QtGui.QWidget):
      def __init__(s):
          super(P2,s).__init__()
  #        print ">>>> dir(P2):", dir(P2)
          print "is initUI in dir()?", 'initUI' in dir()
          s.initUI()

      def initUI(s):
          s.setGeometry(300, 300, 250, 150)
          s.setWindowTitle('Icon')
          s.setWindowIcon(QtGui.QIcon('web.png'))        
          s.show()


  2) Started python interpreter
  3) Inside python I gave the following commands
  >>> import P2
  >>> q=P2.P2()
  with the following result

  QWidget: Must construct a QApplication before a QPaintDevice
  Aborted (core dumped)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: python-qt4 4.10.4+dfsg-1ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Fri Apr 25 19:37:57 2014
  InstallationDate: Installed on 2012-02-18 (796 days ago)
  InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  SourcePackage: python-qt4
  UpgradeStatus: Upgraded to trusty on 2014-04-20 (4 days ago)

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