glibc detected python double free or corruption fasttop 0x08b20478 Bac

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*** glibc detected *** python: double free or corruption (fasttop): 0x08b20478 ***
======= Backtrace: =========
/lib/libc.so.6[0x40273ee4]
/lib/libc.so.6(cfree+0x9c)[0x402757bc]
/usr/lib/libQtCore.so.4(_Z5qFreePv+0x1d)[0x41820bbd]
/usr/lib/libQtGui.so.4[0x4107970d]
/usr/lib/libQtGui.so.4(_ZN14QWidgetPrivate16syncBackingStoreEv+0x96)[0x40eb33b6]
/usr/lib/libQtGui.so.4(_ZN7QWidget5eventEP6QEvent+0x995)[0x40ebb435]
/usr/lib/libQtGui.so.4(_ZN11QMainWindow5eventEP6QEvent+0x77)[0x412a9e87]
/usr/lib/python2.6/site-packages/PyQt4/QtGui.so[0x4095cf47]
/usr/lib/libQtGui.so.4(_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent+0xbc)[0x40e64dec]
/usr/lib/libQtGui.so.4(_ZN12QApplication6notifyEP7QObjectP6QEvent+0x1a2)[0x40e6d162]
/usr/lib/python2.6/site-packages/PyQt4/QtGui.so[0x40b36776]
/usr/lib/libQtCore.so.4(_ZN16QCoreApplication14notifyInternalEP7QObjectP6QEvent+0x7b)[0x419191bb]
/usr/lib/libQtCore.so.4(_ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData+0x2a5)[0x41919df5]
/usr/lib/libQtCore.so.4(_ZN16QCoreApplication16sendPostedEventsEP7QObjecti+0x2d)[0x41919fed]
/usr/lib/libQtCore.so.4[0x41944c6f]
/usr/lib/libglib-2.0.so.0(g_main_context_dispatch+0x1e8)[0x41a97718]
/usr/lib/libglib-2.0.so.0[0x41a9ac7b]
/usr/lib/libglib-2.0.so.0(g_main_context_iteration+0x68)[0x41a9adf8]
/usr/lib/libQtCore.so.4(_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE+0x58)[0x419448b8]
/usr/lib/libQtGui.so.4[0x40f03335]
/usr/lib/libQtCore.so.4(_ZN10QEventLoop13processEventsE6QFlagsINS_17ProcessEventsFlagEE+0x4a)[0x419177ea]
/usr/lib/libQtCore.so.4(_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE+0xea)[0x41917c2a]
/usr/lib/libQtCore.so.4(_ZN16QCoreApplication4execEv+0xb9)[0x4191a0b9]
/usr/lib/libQtGui.so.4(_ZN12QApplication4execEv+0x27)[0x40e64c67]
/usr/lib/python2.6/site-packages/PyQt4/QtGui.so[0x40b3758d]
/usr/lib/libpython2.6.so.1.0(PyCFunction_Call+0x18d)[0x400bf47d]
/usr/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x5721)[0x40121a21]
/usr/lib/libpython2.6.so.1.0(PyEval_EvalCodeEx+0x7e0)[0x401239f0]
/usr/lib/libpython2.6.so.1.0(PyEval_EvalCode+0x63)[0x40123b53]
/usr/lib/libpython2.6.so.1.0(PyRun_FileExFlags+0xb4)[0x40143904]
/usr/lib/libpython2.6.so.1.0(PyRun_SimpleFileExFlags+0x1fc)[0x40143c5c]
/usr/lib/libpython2.6.so.1.0(PyRun_AnyFileExFlags+0x7a)[0x40143f4a]
/usr/lib/libpython2.6.so.1.0(Py_Main+0xd8e)[0x4015196e]
python(main+0x32)[0x8048622]
/lib/libc.so.6(__libc_start_main+0xe5)[0x4021e6c5]
python[0x8048551]
======= Memory map: ========
08048000-08049000 r-xp 00000000 08:11 18793087 /usr/bin/python2.6
08049000-0804a000 rw-p 00000000 08:11 18793087 /usr/bin/python2.6
084f0000-08fac000 rw-p 084f0000 00:00 0 [heap]
40000000-4001c000 r-xp 00000000 08:11 24707245 /lib/ld-2.9.so
4001c000-4001d000 r--p 0001b000 08:11 24707245 /lib/ld-2.9.so
4001d000-4001e000 rw-p 0001c000 08:11 24707245 /lib/ld-2.9.so
4001e000-4001f000 r-xp 4001e000 00:00 0 [vdso]
4001f000-40044000 r-xp 00000000 08:11 11141897 /usr/lib/libpng12.so.0.35.0
40044000-40045000 rw-p 00024000 08:11 11141897 /usr/lib/libpng12.so.0.35.0
40045000-4004c000 r-xp 00000000 08:11 11145650 /usr/lib/libSM.so.6.0.0
4004c000-4004d000 rw-p 00006000 08:11 11145650 /usr/lib/libSM.so.6.0.0
4004d000-4004e000 r-xp 00000000 08:11 11215370 /usr/lib/python2.6/lib-dynload/_bisect.so
4004e000-4004f000 rw-p 00001000 08:11 11215370 /usr/lib/python2.6/lib-dynload/_bisect.so
4004f000-40050000 rw-p 4004f000 00:00 0
40050000-4018d000 r-xp 00000000 08:11 13058713 /usr/lib/libpython2.6.so.1.0
4018d000-401b9000 rw-p 0013c000 08:11 13058713 /usr/lib/libpython2.6.so.1.0
401b9000-401c2000 rw-p 401b9000 00:00 0
401c2000-401d6000 r-xp 00000000 08:11 24710047 /lib/libpthread-2.9.so
401d6000-401d7000 r--p 00014000 08:11 24710047 /lib/libpthread-2.9.so
401d7000-401d8000 rw-p 00015000 08:11 24710047 /lib/libpthread-2.9.so
401d8000-401da000 rw-p 401d8000 00:00 0
401da000-401dc000 r-xp 00000000 08:11 24710048 /lib/libdl-2.9.so
401dc000-401dd000 r--p 000010zsh: abort python main.py