[PyQt] pykde crash on debian etch / import kparts or khtml

[Jim Bublitz]

On Friday 28 September 2007 07:56, jbd wrote:

> I've got a small problem with an application i'm trying to port from 
> sarge to etch. Here is the minimal application which mimics the problem.
> It's a simple QDialog with a QPushButton which triggers a KDirLister and 
> print the result on stdout. It works well as long as i don't import 
> khtml or kparts.

> I'm running a clean debian etch system :
> kdelibs : 4:3.5.5a.dfsg.1-8
> python-kde3 : 3.15.2+20060422-3
> python-qt3 : 3.16-1.2

> The same code sample runs well on debian sarge but crash on debian etch 
> and ubuntu feisty. It seems that's i'm doing something wrong here.

It crashes here too (not on Debian). It appears to be related to the 
'newItems' signal - that's where the backtrace indicates the crash is 
originating. I have no idea what the cause is, but I think you can achieve 
the same thing with the two changes below, and with those changes it works 
here.

>From looking at the comments in the KDE h files, it seems like there might be 
some kind of timing issues related to the signals, but I have no idea why 
importing other modules would trigger the problem.

Jim



> # -*- coding: utf-8 -*-
>
> import sys
>
> from qt import QDialog, QPushButton, SIGNAL
> from kdecore import KCmdLineArgs, KApplication, KURL
> from kio import KDirLister
>
> # Remove one or both of the comment to crash the application
> #from khtml import *
> #from kparts import * #
>
> class TestCrash(QDialog):
>      def __init__(self, parent=None):
>          QDialog.__init__(self, parent)
>          button = QPushButton("Run kdirlister", self)
>          self._dirLister = KDirLister()
>          self.connect(button, SIGNAL("clicked()"), self._openHome)
>#          self.connect(self._dirLister, SIGNAL("newItems(const
># KFileItemList&)"),


        self.connect(self._dirLister, SIGNAL("completed ()"), 
self._slotNewItems)



>                       self._slotNewItems)
>
>      def _openHome(self):
>         self._dirLister.openURL(KURL("/"))
>
>
>      def _slotNewItems(self, items):
>          print "="*50
> #         for item in items:


        for item in self._dirLister.items ():


>              print item.url().prettyURL()
>          print "="*50
>
>
> def main():
>      try:
>          KCmdLineArgs.init(sys.argv, "crash test", "crash test","crash
> test")
>          app = KApplication(True, True)
>
>          widget = TestCrash()
>          widget.show()
>          app.setMainWidget(widget)
>          res = app.exec_loop()
>
>          print "Return value", res
>
>      except Exception, what:
>          print "Exception catched:", str(what)
>          sys.exit(-1)
>
>
> if __name__=="__main__":
>      main()