[vlmc-devel] VLMC crash logs and bugs

[Rohit Yadav]

Hello everyone,

I've attached some back-traces, these bugs need to be fixed...

Log #1 -> When I drop clips on time line and cut them and start moving them
too fast, somehow setOpacity causes a segmentation fault.
If I remove the line that sets the opacity in TracksView.cpp and the crash
never happens again.

Log #2 -> If I import videos that are already in workspace and try to save
the VLMC project in the same directory, it says that file of same name
exists and crashes. Perhaps we need to add checks that, if source and
destination is the same, don't copy the videos...

Log #3 and #4 -> If I cut the clips in the timeline and move them and delete
it using the "delete key", these crashes happens.

Log #5 -> While rendering, the image never shows up properly, it's just
horizontal parallel lines and this crash... but sometimes rendering
succeeds...
Most of the time, I get vlc_join thread deadlock while rendering or,
sws_scale () crashes or, vlc fails to malloc properly and blows up into
pieces.

On Windows 7, it hangs and crashes as soon as I drop clips from media
library to the project timeline... *weird*

Hope we fix that soon :-)

Best Regards,
Rohit Yadav
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(gdb) bt
#0  0x00b47f32 in QGraphicsItem::setOpacity(double) () from /usr/lib/libQtGui.so.4
#1  0x0813e702 in TracksView::mouseMoveEvent (this=0x854cca0, event=0xbfffeaa0) at /home/rohit/Lab/vlmc/src/Gui/timeline/TracksView.cpp:939
#2  0x0053f69a in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#3  0x0093bfd3 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#4  0x009d6382 in QAbstractScrollArea::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#5  0x00bac06b in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#6  0x009d8c65 in ?? () from /usr/lib/libQtGui.so.4
#7  0x00295cda in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#8  0x004e14b9 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#9  0x004e89f7 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#10 0x00296a3b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#11 0x004e7952 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) ()
   from /usr/lib/libQtGui.so.4
#12 0x00573088 in ?? () from /usr/lib/libQtGui.so.4
#13 0x00572511 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#14 0x005a160a in ?? () from /usr/lib/libQtGui.so.4
#15 0x0151e5e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#16 0x015222d8 in ?? () from /lib/libglib-2.0.so.0
#17 0x015224b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#18 0x002c25d5 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#19 0x005a1135 in ?? () from /usr/lib/libQtGui.so.4
#20 0x00295059 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#21 0x002954aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#22 0x0029969f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#23 0x004e1577 in QApplication::exec() () from /usr/lib/libQtGui.so.4
---Type <return> to continue, or q <return> to quit---
#24 0x0814f4b7 in VLMCmain (argc=1, argv=0xbffff4e4) at /home/rohit/Lab/vlmc/src/Main/guimain.cpp:121
#25 0x080e56d8 in main (argc=1, argv=0xbffff4e4) at /home/rohit/Lab/vlmc/src/Main/vlmc.cpp:104
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(gdb) bt
#0  0x0012d422 in __kernel_vsyscall ()
#1  0x014ac015 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x013059dd in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x001938c2 in ?? () from /usr/lib/libQtCore.so.4
#4  0x0018f072 in QMutex::lock() () from /usr/lib/libQtCore.so.4
#5  0x080c7937 in QMutexLocker::relock (this=0xbfffe084) at /usr/include/qt4/QtCore/qmutex.h:120
#6  0x080c78b1 in QMutexLocker (this=0xbfffe084, m=0xb7a01708) at /usr/include/qt4/QtCore/qmutex.h:102
#7  0x080ccbda in Workspace::copyTerminated (this=0xb7a01690, media=0x8733620, dest=...) at /home/rohit/Lab/vlmc/src/Project/Workspace.cpp:128
#8  0x080cc8be in Workspace::startCopyWorker (this=0xb7a01690, media=0x8733620) at /home/rohit/Lab/vlmc/src/Project/Workspace.cpp:96
#9  0x080cc635 in Workspace::copyToWorkspace (this=0xb7a01690, media=0x8733620) at /home/rohit/Lab/vlmc/src/Project/Workspace.cpp:74
#10 0x080cd061 in Workspace::copyAllToWorkspace (this=0xb7a01690) at /home/rohit/Lab/vlmc/src/Project/Workspace.cpp:191
#11 0x0812375c in GUIProjectManager::createNewProjectFile (this=0xb7a00508, saveAs=false) at /home/rohit/Lab/vlmc/src/Gui/project/GuiProjectManager.cpp:151
#12 0x0812386a in GUIProjectManager::saveProject (this=0xb7a00508, saveAs=false) at /home/rohit/Lab/vlmc/src/Gui/project/GuiProjectManager.cpp:162
#13 0x080f35ea in MainWindow::on_actionSave_triggered (this=0xbffff314) at /home/rohit/Lab/vlmc/src/Gui/MainWindow.cpp:369
#14 0x0815509b in MainWindow::qt_metacall (this=0xbffff314, _c=QMetaObject::InvokeMetaMethod, _id=11, _a=0xbfffe398)
    at /home/rohit/Lab/vlmc/build/src/Gui/moc_MainWindow.cxx:131
#15 0x0029bc9a in QMetaObject::metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib/libQtCore.so.4
#16 0x002aa3d5 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#17 0x004dabd9 in QAction::triggered(bool) () from /usr/lib/libQtGui.so.4
#18 0x004dcdcc in QAction::activate(QAction::ActionEvent) () from /usr/lib/libQtGui.so.4
#19 0x009cfbd2 in QToolButton::nextCheckState() () from /usr/lib/libQtGui.so.4
#20 0x008eccb3 in ?? () from /usr/lib/libQtGui.so.4
#21 0x008ecfae in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#22 0x009d009c in QToolButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#23 0x0053f7f8 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
---Type <return> to continue, or q <return> to quit---
#24 0x008ebd4e in QAbstractButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x009d2bca in QToolButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#26 0x004e14dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#27 0x004e89f7 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#28 0x00296a3b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#29 0x004e7952 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) ()
   from /usr/lib/libQtGui.so.4
#30 0x00573088 in ?? () from /usr/lib/libQtGui.so.4
#31 0x00572511 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#32 0x005a160a in ?? () from /usr/lib/libQtGui.so.4
#33 0x0151e5e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#34 0x015222d8 in ?? () from /lib/libglib-2.0.so.0
#35 0x015224b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#36 0x002c25d5 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#37 0x005a1135 in ?? () from /usr/lib/libQtGui.so.4
#38 0x00295059 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#39 0x002954aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#40 0x0029969f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#41 0x004e1577 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#42 0x0814f4b7 in VLMCmain (argc=1, argv=0xbffff4e4) at /home/rohit/Lab/vlmc/src/Main/guimain.cpp:121
#43 0x080e56d8 in main (argc=1, argv=0xbffff4e4) at /home/rohit/Lab/vlmc/src/Main/vlmc.cpp:104
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(gdb) bt
#0  0x0012d422 in __kernel_vsyscall ()
#1  0x01255651 in raise () from /lib/tls/i686/cmov/libc.so.6
#2  0x01258a82 in abort () from /lib/tls/i686/cmov/libc.so.6
#3  0x0128c49d in ?? () from /lib/tls/i686/cmov/libc.so.6
#4  0x01296591 in ?? () from /lib/tls/i686/cmov/libc.so.6
#5  0x0129780e in ?? () from /lib/tls/i686/cmov/libc.so.6
#6  0x0018ea5d in qFree(void*) () from /usr/lib/libQtCore.so.4
#7  0x00b99ba9 in ?? () from /usr/lib/libQtGui.so.4
#8  0x00b9b059 in ?? () from /usr/lib/libQtGui.so.4
#9  0x00b9b4ce in ?? () from /usr/lib/libQtGui.so.4
#10 0x00b9b827 in ?? () from /usr/lib/libQtGui.so.4
#11 0x00b9bb5e in ?? () from /usr/lib/libQtGui.so.4
#12 0x00b48bad in QGraphicsItem::prepareGeometryChange() () from /usr/lib/libQtGui.so.4
#13 0x00b49305 in QGraphicsItemPrivate::setPosHelper(QPointF const&) () from /usr/lib/libQtGui.so.4
#14 0x00b524cc in QGraphicsItem::setPos(QPointF const&) () from /usr/lib/libQtGui.so.4
#15 0x0812c9d0 in QGraphicsItem::setPos (this=0x8757090, ax=833, ay=0) at /usr/include/qt4/QtGui/qgraphicsitem.h:491
#16 0x0812c086 in AbstractGraphicsItem::setStartPos (this=0x8757088, position=833) at /home/rohit/Lab/vlmc/src/Gui/timeline/AbstractGraphicsItem.cpp:110
#17 0x0812df5b in AbstractGraphicsMediaItem::setStartPos (this=0x8757088, position=833)
    at /home/rohit/Lab/vlmc/src/Gui/timeline/AbstractGraphicsMediaItem.cpp:319
#18 0x0813c9b0 in TracksView::moveItem (this=0x854cbf8, item=0x8757088, track=0, time=833) at /home/rohit/Lab/vlmc/src/Gui/timeline/TracksView.cpp:608
#19 0x0813c39e in TracksView::moveItem (this=0x854cbf8, item=0x8757088, position=...) at /home/rohit/Lab/vlmc/src/Gui/timeline/TracksView.cpp:516
#20 0x0813e7d9 in TracksView::mouseMoveEvent (this=0x854cbf8, event=0xbfffeaa0) at /home/rohit/Lab/vlmc/src/Gui/timeline/TracksView.cpp:943
#21 0x0053f69a in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x0093bfd3 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x009d6382 in QAbstractScrollArea::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
---Type <return> to continue, or q <return> to quit---
#24 0x00bac06b in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x009d8c65 in ?? () from /usr/lib/libQtGui.so.4
#26 0x00295cda in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#27 0x004e14b9 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#28 0x004e89f7 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#29 0x00296a3b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#30 0x004e7952 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) ()
   from /usr/lib/libQtGui.so.4
#31 0x00573088 in ?? () from /usr/lib/libQtGui.so.4
#32 0x00572511 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#33 0x005a160a in ?? () from /usr/lib/libQtGui.so.4
#34 0x0151e5e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#35 0x015222d8 in ?? () from /lib/libglib-2.0.so.0
#36 0x015224b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#37 0x002c25d5 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#38 0x005a1135 in ?? () from /usr/lib/libQtGui.so.4
#39 0x00295059 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#40 0x002954aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#41 0x0029969f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#42 0x004e1577 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#43 0x0814f4b7 in VLMCmain (argc=1, argv=0xbffff4e4) at /home/rohit/Lab/vlmc/src/Main/guimain.cpp:121
#44 0x080e56d8 in main (argc=1, argv=0xbffff4e4) at /home/rohit/Lab/vlmc/src/Main/vlmc.cpp:104
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Program received signal SIGSEGV, Segmentation fault.
0x00b4a983 in QGraphicsItem::mapToScene(QPointF const&) const () from /usr/lib/libQtGui.so.4
(gdb) 
(gdb) 
(gdb) bt
#0  0x00b4a983 in QGraphicsItem::mapToScene(QPointF const&) const () from /usr/lib/libQtGui.so.4
#1  0x08140d60 in QGraphicsItem::mapToScene (this=0x876c7e8, ax=0, ay=0) at /usr/include/qt4/QtGui/qgraphicsitem.h:503
#2  0x0813eab0 in TracksView::mouseMoveEvent (this=0x854cd98, event=0xbfffeaa0) at /home/rohit/Lab/vlmc/src/Gui/timeline/TracksView.cpp:971
#3  0x0053f69a in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#4  0x0093bfd3 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#5  0x009d6382 in QAbstractScrollArea::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#6  0x00bac06b in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#7  0x009d8c65 in ?? () from /usr/lib/libQtGui.so.4
#8  0x00295cda in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#9  0x004e14b9 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#10 0x004e89f7 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#11 0x00296a3b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#12 0x004e7952 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) ()
   from /usr/lib/libQtGui.so.4
#13 0x00573088 in ?? () from /usr/lib/libQtGui.so.4
#14 0x00572511 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#15 0x005a160a in ?? () from /usr/lib/libQtGui.so.4
#16 0x0151e5e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#17 0x015222d8 in ?? () from /lib/libglib-2.0.so.0
#18 0x015224b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#19 0x002c25d5 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#20 0x005a1135 in ?? () from /usr/lib/libQtGui.so.4
#21 0x00295059 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#22 0x002954aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#23 0x0029969f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
---Type <return> to continue, or q <return> to quit---
#24 0x004e1577 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#25 0x0814f45b in VLMCmain (argc=1, argv=0xbffff4e4) at /home/rohit/Lab/vlmc/src/Main/guimain.cpp:121
#26 0x080e56d8 in main (argc=1, argv=0xbffff4e4) at /home/rohit/Lab/vlmc/src/Main/vlmc.cpp:104
-------------- next part --------------
#0  0x0012d422 in __kernel_vsyscall ()
#1  0x01255651 in raise () from /lib/tls/i686/cmov/libc.so.6
#2  0x01258a82 in abort () from /lib/tls/i686/cmov/libc.so.6
#3  0x0128c49d in ?? () from /lib/tls/i686/cmov/libc.so.6
#4  0x01296591 in ?? () from /lib/tls/i686/cmov/libc.so.6
#5  0x0129780e in ?? () from /lib/tls/i686/cmov/libc.so.6
#6  0x00200611 in ?? () from /usr/lib/libQtCore.so.4
#7  0x001f1fc1 in ?? () from /usr/lib/libQtCore.so.4
#8  0x001f25f9 in ?? () from /usr/lib/libQtCore.so.4
#9  0x00203acf in ?? () from /usr/lib/libQtCore.so.4
#10 0x00207c30 in ?? () from /usr/lib/libQtCore.so.4
#11 0x00202f54 in ?? () from /usr/lib/libQtCore.so.4
#12 0x00209c4d in qShapeItem(HB_ShaperItem_*) () from /usr/lib/libQtCore.so.4
#13 0x00765cc2 in QTextEngine::shapeTextWithHarfbuzz(int) const () from /usr/lib/libQtGui.so.4
#14 0x0076672a in QTextEngine::shapeText(int) const () from /usr/lib/libQtGui.so.4
#15 0x00766bea in QTextEngine::shape(int) const () from /usr/lib/libQtGui.so.4
#16 0x007693e7 in QTextEngine::width(int, int) const () from /usr/lib/libQtGui.so.4
#17 0x0076955c in QTextEngine::elidedText(Qt::TextElideMode, QFixed const&, int) const () from /usr/lib/libQtGui.so.4
#18 0x0074055d in QFontMetrics::elidedText(QString const&, Qt::TextElideMode, int, int) const () from /usr/lib/libQtGui.so.4
#19 0x08133883 in GraphicsMovieItem::paintTitle (this=0x87cc778, painter=0xbfffd8e4, option=0x854ec98)
    at /home/rohit/Lab/vlmc/src/Gui/timeline/GraphicsMovieItem.cpp:175
#20 0x08132e88 in GraphicsMovieItem::paint (this=0x87cc778, painter=0xbfffd8e4, option=0x854ec98)
    at /home/rohit/Lab/vlmc/src/Gui/timeline/GraphicsMovieItem.cpp:75
#21 0x00b943d8 in ?? () from /usr/lib/libQtGui.so.4
#22 0x00b94cb3 in ?? () from /usr/lib/libQtGui.so.4
---Type <return> to continue, or q <return> to quit---
#23 0x00b940d4 in ?? () from /usr/lib/libQtGui.so.4
#24 0x00b94cb3 in ?? () from /usr/lib/libQtGui.so.4
#25 0x00b940d4 in ?? () from /usr/lib/libQtGui.so.4
#26 0x00b94cb3 in ?? () from /usr/lib/libQtGui.so.4
#27 0x00b956be in ?? () from /usr/lib/libQtGui.so.4
#28 0x00bafbeb in QGraphicsView::paintEvent(QPaintEvent*) () from /usr/lib/libQtGui.so.4
#29 0x0053f6b6 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#30 0x0093bfd3 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#31 0x009d6382 in QAbstractScrollArea::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#32 0x00bac06b in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#33 0x009d8c65 in ?? () from /usr/lib/libQtGui.so.4
#34 0x00295cda in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#35 0x004e14b9 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#36 0x004e80f9 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#37 0x00296a3b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#38 0x005489d6 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#39 0x0071f7d7 in ?? () from /usr/lib/libQtGui.so.4
#40 0x00538b93 in QWidgetPrivate::syncBackingStore() () from /usr/lib/libQtGui.so.4
#41 0x0053fe76 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#42 0x0095abc7 in QMainWindow::event(QEvent*) () from /usr/lib/libQtGui.so.4
#43 0x004e14dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#44 0x004e80f9 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#45 0x00296a3b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#46 0x00299473 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
---Type <return> to continue, or q <return> to quit---
#47 0x002995dd in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#48 0x00b91326 in ?? () from /usr/lib/libQtGui.so.4
#49 0x00b91876 in QGraphicsScene::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtGui.so.4
#50 0x0815a175 in TracksScene::qt_metacall (this=0x854c820, _c=QMetaObject::InvokeMetaMethod, _id=18, _a=0xad813a58)
    at /home/rohit/Lab/vlmc/build/src/Gui/timeline/moc_TracksScene.cxx:64
#51 0x0029bc9a in QMetaObject::metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib/libQtCore.so.4
#52 0x002a6336 in QMetaCallEvent::placeMetaCall(QObject*) () from /usr/lib/libQtCore.so.4
#53 0x002a73fe in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#54 0x00b8d554 in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#55 0x004e14dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#56 0x004e805e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#57 0x00296a3b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#58 0x00299473 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#59 0x002995dd in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#60 0x002c2adf in ?? () from /usr/lib/libQtCore.so.4
#61 0x0151e5e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#62 0x015222d8 in ?? () from /lib/libglib-2.0.so.0
#63 0x015224b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#64 0x002c25d5 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#65 0x005a1135 in ?? () from /usr/lib/libQtGui.so.4
#66 0x00295059 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#67 0x002954aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#68 0x0029969f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#69 0x004e1577 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#70 0x0814f40b in VLMCmain (argc=1, argv=0xbffff4e4) at /home/rohit/Lab/vlmc/src/Main/guimain.cpp:121
---Type <return> to continue, or q <return> to quit---
#71 0x080e56d8 in main (argc=1, argv=0xbffff4e4) at /home/rohit/Lab/vlmc/src/Main/vlmc.cpp:104