Program terminated with signal 11, Segmentation fault.
#0  0xfe514c60 in QMutexLocker (func=0, interpolationType=67)
    at /opt/build/qt-everywhere-opensource-src-4.7.1/include/QtCore/../../src/corelib/thread/qmutex.h:101
101             if (m) {
(gdb) list      
96      public:
97          inline explicit QMutexLocker(QMutex *m)
98          {
99              Q_ASSERT_X((reinterpret_cast<quintptr>(m) & quintptr(1u)) == quintptr(0),
100                        "QMutexLocker", "QMutex pointer is misaligned");
101             if (m) {
102                 m->lock();
103                 val = reinterpret_cast<quintptr>(m) | quintptr(1u);
104             } else {
105                 val = 0;
(gdb) up
#1  QVariantAnimation::registerInterpolator (func=0, interpolationType=67)
    at animation/qvariantanimation.cpp:435
435         QMutexLocker locker(QMutexPool::globalInstanceGet(interpolators));
(gdb) list
430     void QVariantAnimation::registerInterpolator(QVariantAnimation::Interpolator func, int interpolationType)
431     {
432         // will override any existing interpolators
433         QInterpolatorVector *interpolators = registeredInterpolators();
434     #ifndef QT_NO_THREAD
435         QMutexLocker locker(QMutexPool::globalInstanceGet(interpolators));
436     #endif
437         if (int(interpolationType) >= interpolators->count())
438             interpolators->resize(int(interpolationType) + 1);
439         interpolators->replace(interpolationType, func);
(gdb) p interpolators
$1 = (QInterpolatorVector *) 0x0
(gdb) up
#2  0xfbe828a8 in qUnregisterGuiGetInterpolator (__initialize_p=0, 
    __priority=65535) at animation/qguivariantanimation.cpp:82
82              (QVariant (*)(const QColor &, const QColor &, qreal))0);