[Bug 561303] Re: PyQt4 applications crash at exit

[Scott Kitterman]

The full diff isn't needed and contains new features that aren't the
sort we generally accept for an SRU.  The relevant bit of the diff to
fix this problem is:

=== modified file 'sip/QtGui/qapplication.sip'
--- sip/QtGui/qapplication.sip  revid:james.westby at ubuntu.com-20100323222732-06b2oty73v82ag1o
+++ sip/QtGui/qapplication.sip  revid:cshorler at googlemail.com-20120520132153-3ifiwl7jly55pil0
@@ -1,4 +1,4 @@
-// qapplication.sip generated by MetaSIP on Wed Mar 17 18:29:25 2010
+// qapplication.sip generated by MetaSIP on Fri Apr 16 11:32:08 2010
 //
 // This file is part of the QtGui Python extension module.
 //
@@ -596,13 +596,17 @@
 %End
     virtual ~QApplication();
 %MethodCode
-        // Make sure all top level widgets are deleted before the QApplication.  This
-        // is a typical cause of crashes (or at least strange behaviour) when an
-        // application terminates.
+        // Make sure all top level widgets are not owned by Python and so won't be
+        // destroyed by the garbage collector after QApplication is destroyed.
         QWidgetList tlw = QApplication::topLevelWidgets();
         
         for (int i = 0; i < tlw.count(); ++i)
-            delete tlw.at(i);
+        {
+            PyObject *sw = sipGetPyObject(tlw.at(i), sipType_QWidget);
+        
+            if (sw)
+                sipTransferTo(sw, 0);
+        }
         
         // Handle all other QObject instances that we want to make sure are deleted
         // before the QApplication is deleted.

Please don't do the full version update.  Do a new one with this as a
patch.

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https://bugs.launchpad.net/bugs/561303

Title:
  PyQt4 applications crash at exit

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