Fix bug 844 - "Crash in QGraphicsItem::toGraphicsObject when printing obj reference"

Reviewer: Marcelo Lira <marcelo.lira@openbossa.org>
          Renato Araújo <renato.filho@openbossa.org>

PySide/QtGui/typesystem_gui_common.xml

@@ -6428,7 +6428,7 @@
   <object-type name="QGraphicsEffectSource"/>
   -->
 
-  <object-type name="QGraphicsObject" polymorphic-id-expression="qgraphicsitem_cast&lt;QGraphicsObject*>(%1)" />
+  <object-type name="QGraphicsObject" />
   <object-type name="QGraphicsOpacityEffect"/>
   <object-type name="QGraphicsRotation"/>
   <object-type name="QGraphicsScale"/>

tests/QtGui/CMakeLists.txt

@@ -55,6 +55,7 @@ PYSIDE_TEST(bug_778.py)
 PYSIDE_TEST(bug_793.py)
 PYSIDE_TEST(bug_811.py)
 PYSIDE_TEST(bug_836.py)
+PYSIDE_TEST(bug_844.py)
 PYSIDE_TEST(customproxywidget_test.py)
 PYSIDE_TEST(deepcopy_test.py)
 PYSIDE_TEST(float_to_int_implicit_conversion_test.py)

tests/QtGui/bug_844.py

@@ -0,0 +1,19 @@
+from PySide.QtGui import *
+from PySide.QtCore import *
+
+class QtKeyPressListener(QObject):
+    def __init__(self, obj):
+        QObject.__init__(self)
+        obj.installEventFilter(self)
+        self.fConnections = {}
+
+    def eventFilter(self, obj, event):
+        # This used to crash here due to a misbehaviour of type discovery!
+        return QObject.eventFilter(self, obj, event)
+
+app = QApplication([])
+key_listener = QtKeyPressListener(app)
+w = QLabel('Hello')
+w.show()
+QTimer.singleShot(0, w.close)
+app.exec_()