Application: kdenlive (0.9.2)
KDE Platform Version: 4.9.3
Qt Version: 4.8.3
Operating System: Linux 3.5.0-17-generic x86_64
Distribution: Linux Mint 14 Nadia

-- Information about the crash:
<In detail, tell us what you were doing  when the application crashed.>

The crash can be reproduced every time.

-- Backtrace:
Application: Kdenlive (kdenlive), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#5  QUrl::QUrl (this=0x7fff4b451fb0, other=...) at io/qurl.cpp:4260
#6  0x00007fb4fb4b73c9 in KUrl::KUrl(KUrl const&) () from /usr/lib/libkdecore.so.5
#7  0x00007fb5002bc310 in KdenliveDoc::projectFolder (this=<optimized out>) at /build/buildd/kdenlive-0.9.2/src/kdenlivedoc.cpp:791
#8  0x00007fb500188771 in MainWindow::saveFileAs (this=0x7fb5010ae960) at /build/buildd/kdenlive-0.9.2/src/mainwindow.cpp:1986
#9  0x00007fb5001a1bcb in MainWindow::qt_static_metacall (_o=0x7fb5010ae960, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at /build/buildd/kdenlive-0.9.2/build/src/mainwindow.moc:378
#10 0x00007fb4fcd5ef5f in QMetaObject::activate (sender=0x7fb501581a10, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff4b452260) at kernel/qobject.cpp:3547
#11 0x00007fb4fd725a32 in QAction::triggered (this=this@entry=0x7fb501581a10, _t1=false) at .moc/release-shared/moc_qaction.cpp:277
#12 0x00007fb4fd725c20 in QAction::activate (this=0x7fb501581a10, event=<optimized out>) at kernel/qaction.cpp:1257
#13 0x00007fb4fdb643d3 in QMenuPrivate::activateCausedStack (this=this@entry=0x7fb50202f100, causedStack=..., action=action@entry=0x7fb501581a10, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1028
#14 0x00007fb4fdb6a6b9 in QMenuPrivate::activateAction (this=0x7fb50202f100, action=0x7fb501581a10, action_e=QAction::Trigger, self=<optimized out>) at widgets/qmenu.cpp:1120
#15 0x00007fb4ffaed090 in KMenu::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libkdeui.so.5
#16 0x00007fb4fd77b850 in QWidget::event (this=0x7fb501f8c690, event=0x7fff4b452e00) at kernel/qwidget.cpp:8371
#17 0x00007fb4fdb6b96b in QMenu::event (this=0x7fb501f8c690, e=0x7fff4b452e00) at widgets/qmenu.cpp:2469
#18 0x00007fb4fd72be9c in QApplicationPrivate::notify_helper (this=this@entry=0x7fb500e36870, receiver=receiver@entry=0x7fb501f8c690, e=e@entry=0x7fff4b452e00) at kernel/qapplication.cpp:4562
#19 0x00007fb4fd730b6b in QApplication::notify (this=<optimized out>, receiver=0x7fb501f8c690, e=0x7fff4b452e00) at kernel/qapplication.cpp:4105
#20 0x00007fb4ffa341d6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#21 0x00007fb4fcd4956e in QCoreApplication::notifyInternal (this=0x7fff4b453af0, receiver=0x7fb501f8c690, event=0x7fff4b452e00) at kernel/qcoreapplication.cpp:915
#22 0x00007fb4fd72ccd3 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#23 QApplicationPrivate::sendMouseEvent (receiver=0x7fb501f8c690, event=0x7fff4b452e00, alienWidget=0x0, nativeWidget=0x7fb501f8c690, buttonDown=0x7fb4fe208308 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3173
#24 0x00007fb4fd7aa41c in QETWidget::translateMouseEvent (this=this@entry=0x7fb501f8c690, event=event@entry=0x7fff4b453580) at kernel/qapplication_x11.cpp:4556
#25 0x00007fb4fd7a944f in QApplication::x11ProcessEvent (this=0x7fff4b453af0, event=0x7fff4b453580) at kernel/qapplication_x11.cpp:3737
#26 0x00007fb4fd7d0fa2 in x11EventSourceDispatch (s=0x7fb500e37e40, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#27 0x00007fb4f7e60ab5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fb4f7e60de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007fb4f7e60ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007fb4fcd77bf6 in QEventDispatcherGlib::processEvents (this=0x7fb500e0fbb0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#31 0x00007fb4fd7d0c1e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#32 0x00007fb4fcd482bf in QEventLoop::processEvents (this=this@entry=0x7fff4b453950, flags=...) at kernel/qeventloop.cpp:149
#33 0x00007fb4fcd48548 in QEventLoop::exec (this=0x7fff4b453950, flags=...) at kernel/qeventloop.cpp:204
#34 0x00007fb4fcd4d708 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#35 0x00007fb500101670 in main (argc=5, argv=0x7fff4b453c28) at /build/buildd/kdenlive-0.9.2/src/main.cpp:89

Report to http://kdenlive.org/mantis