.
Thread 1 (Thread 4096):
#0  0x0187fce2 in ~QX11WindowSurface (this=0x9bb7840, 
    __in_chrg=<value optimized out>) at painting/qwindowsurface_x11.cpp:84
No locals.
#1  0x01878946 in ~QWidgetBackingStore (this=0x9bb7810, 
    __in_chrg=<value optimized out>) at painting/qbackingstore.cpp:829
No locals.
#2  0x016da944 in QWidgetPrivate::deleteExtra (this=0x9cd16c0)
    at kernel/qwidget.cpp:1503
No locals.
#3  0x016db0e5 in ~QWidgetPrivate (this=0x9cd16c0, 
    __in_chrg=<value optimized out>) at kernel/qwidget.cpp:227
No locals.
#4  0x01b64189 in ~QDialogPrivate (this=0x9cd16c0, 
    __in_chrg=<value optimized out>)
    at ../../include/QtGui/private/../../../src/gui/dialogs/qdialog_p.h:67
No locals.
#5  0x00b3185a in ~QObject (this=0x9bc5ec8, __in_chrg=<value optimized out>)
    at kernel/qobject.cpp:857
        d = 0x9cd16c0
        locker2 = {{mtx = 0x9362fa8, val = 154546088}}
#6  0x016e094f in ~QWidget (this=0x9bc5ec8, __in_chrg=<value optimized out>)
    at kernel/qwidget.cpp:1380
No locals.
#7  0x01b7be44 in ~QDialog (this=0x9bc5ec8, __in_chrg=<value optimized out>)
    at dialogs/qdialog.cpp:298
No locals.
#8  0x013a1653 in ?? () from /usr/lib/pymodules/python2.6/PyQt4/QtGui.so
#9  0x013407a6 in ?? () from /usr/lib/pymodules/python2.6/PyQt4/QtGui.so
#10 0x013407e9 in ?? () from /usr/lib/pymodules/python2.6/PyQt4/QtGui.so
#11 0x0029f578 in ?? () from /usr/lib/pymodules/python2.6/sip.so
#12 0x0029f5b1 in ?? () from /usr/lib/pymodules/python2.6/sip.so
#13 0x080a8dc3 in ?? ()
#14 0x0808e574 in ?? ()
#15 0x0806a3c3 in ?? ()
#16 0x0808ce59 in ?? ()
#17 0x0808f2b7 in PyDict_SetItem ()
#18 0x08090c13 in _PyModule_Clear ()
#19 0x080ed495 in PyImport_Cleanup ()
#20 0x080f9e15 in Py_Finalize ()
#21 0x0805c30b in Py_Main ()
#22 0x0805baab in main ()