Hi! I have a reproducible crash problem in KDEnlive (select a DV clip, play it in clip monitor, pause, then select any other DV clip - instant crash) and would like to debug it and possibly try to make a patch.
I've compiled my MLT and KDEnlive from sources based on instructions from http://www.kdenlive.org/user-manual/downloading-and-installing-kdenlive/installing-source. However, gdb fails to show adequate debug information when I reproduce the crash: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7f40698ee950 (LWP 1740)] 0x00007f405bbc3610 in ?? () (gdb) where full #0 0x00007f405bbc3610 in ?? () No symbol table info available. #1 0x00007f407d211459 in start_thread (arg=<value optimized out>) at pthread_create.c:154 pd = (struct pthread *) 0x7f40698ee950 unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 7568800041745786965, 8392704, 0, 139915029954624, 139914953993728, -7527462673437939627, -7527417358756206507}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} not_first_call = <value optimized out> robust = <value optimized out> #2 0x00007f407d70ffcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 No locals. #3 0x0000000000000000 in ?? () No symbol table info available. (gdb) thread apply all bt Thread 25 (Thread 0x7f40698ee950 (LWP 1740)): #0 0x00007f405bbc3610 in ?? () #1 0x00007f407d211459 in start_thread (arg=<value optimized out>) at pthread_create.c:154 #2 0x00007f407d70ffcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 #3 0x0000000000000000 in ?? () Thread 1 (Thread 0x7f4081a4b750 (LWP 1714)): #0 0x00007f407d211c95 in pthread_join (threadid=139914625608016, thread_return=0x0) at pthread_join.c:89 #1 0x00007f406f24b785 in consumer_stop (parent=<value optimized out>) at consumer_sdl_preview.c:242 #2 0x00007f408165fbd2 in mlt_consumer_stop (this=0x7f405c00ed10) at mlt_consumer.c:941 #3 0x00007f408143500e in Mlt::Consumer::stop () from /usr/local/lib/libmlt++.so.2 #4 0x0000000000481cc3 in Render::setProducer (this=0x2de08e0, producer=0x47c8030, position=-1) at /home/olo/misc/soft/Graphics/KDEnlive/kde4/kdenlive/kdenlive/src/renderer.cpp:856 #5 0x00000000004784fa in Monitor::slotSetXml (this=0x2dcb5d0, clip=0x3d2b030, position=-1) at /home/olo/misc/soft/Graphics/KDEnlive/kde4/kdenlive/kdenlive/src/monitor.cpp:709 #6 0x000000000047ed71 in Monitor::qt_metacall (this=0x2dcb5d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff89a88aa0) at /home/olo/misc/soft/Graphics/KDEnlive/kde4/kdenlive/kdenlive/build/src/cmake_bindir/monitor.moc:253 #7 0x00007f407f1481f2 in QMetaObject::activate (sender=0x297f820, from_signal_index=<value optimized out>, to_signal_index=27, argv=0xffffffffffffffff) at kernel/qobject.cpp:3069 #8 0x0000000000466d5d in ProjectList::clipSelected (this=0x7f40698ee9e0, _t1=0x3d2b030) at /home/olo/misc/soft/Graphics/KDEnlive/kde4/kdenlive/kdenlive/build/src/cmake_bindir/projectlist.moc:215 #9 0x000000000046dbaa in ProjectList::slotClipSelected (this=0x297f820) at /home/olo/misc/soft/Graphics/KDEnlive/kde4/kdenlive/kdenlive/src/projectlist.cpp:248 #10 0x00000000004716d0 in ProjectList::qt_metacall (this=0x297f820, _c=QMetaObject::InvokeMetaMethod, _id=-512, _a=0x7fff89a88d10) at /home/olo/misc/soft/Graphics/KDEnlive/kde4/kdenlive/kdenlive/build/src/cmake_bindir/projectlist.moc:192 #11 0x00007f407f1481f2 in QMetaObject::activate (sender=0x2aa22a0, from_signal_index=<value optimized out>, to_signal_index=104, argv=0xffffffffffffffff) at kernel/qobject.cpp:3069 #12 0x00007f407e8a7f20 in QTreeWidgetPrivate::_q_selectionChanged (this=0x29e9d50, selected=<value optimized out>, deselect...@0x7fff89a88fa0) at itemviews/qtreewidget.cpp:2303 #13 0x00007f407e8b2194 in QTreeWidget::qt_metacall (this=0x2aa22a0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff89a88f10) at .moc/release-shared/moc_qtreewidget.cpp:154 #14 0x00000000004b2daf in ProjectListView::qt_metacall (this=0x7f40698ee9e0, _c=QMetaObject::InvokeMetaMethod, _id=1740, _a=0xffffffffffffffff) at /home/olo/misc/soft/Graphics/KDEnlive/kde4/kdenlive/kdenlive/build/src/cmake_bindir/projectlistview.moc:74 #15 0x00007f407f1481f2 in QMetaObject::activate (sender=0x2bd3750, from_signal_index=<value optimized out>, to_signal_index=4, argv=0xffffffffffffffff) at kernel/qobject.cpp:3069 #16 0x00007f407e8822b7 in QItemSelectionModel::selectionChanged (this=0x7f40698ee9e0, _t1=<value optimized out>, _t2=<value optimized out>) at .moc/release-shared/moc_qitemselectionmodel.cpp:146 #17 0x00007f407e88af02 in QItemSelectionModel::emitSelectionChanged (this=0x2bd3750, newselecti...@0x0, oldselecti...@0x7fff89a89020) at itemviews/qitemselectionmodel.cpp:1544 #18 0x00007f407e88b281 in QItemSelectionModel::select (this=0x2bd3750, selection=<value optimized out>, command=<value optimized out>) at itemviews/qitemselectionmodel.cpp:1055 #19 0x00007f407e870852 in QTreeViewPrivate::select (this=0x29e9d50, topind...@0x0, bottomIndex=<value optimized out>, command={i = -1985440176}) at itemviews/qtreeview.cpp:3612 #20 0x00007f407e8713e0 in QTreeView::setSelection (this=0x2aa22a0, rect=<value optimized out>, command={i = -1985439840}) at itemviews/qtreeview.cpp:2187 #21 0x00007f407e8374b7 in QAbstractItemView::mousePressEvent (this=0x2aa22a0, event=<value optimized out>) at itemviews/qabstractitemview.cpp:1512 #22 0x00007f407e36daa6 in QWidget::event (this=0x2aa22a0, event=0x7fff89a8a480) at kernel/qwidget.cpp:7512 #23 0x00007f407e70740b in QFrame::event (this=0x2aa22a0, e=0x7fff89a8a480) at widgets/qframe.cpp:559 #24 0x00007f407e83c2bd in QAbstractItemView::viewportEvent (this=0x2aa22a0, event=0x7fff89a8a480) at itemviews/qabstractitemview.cpp:1466 #25 0x00007f407e872ef0 in QTreeView::viewportEvent (this=0x2aa22a0, event=0x7fff89a8a480) at itemviews/qtreeview.cpp:1257 #26 0x00007f407f131a68 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x2a63b30, event=0x7fff89a8a480) at kernel/qcoreapplication.cpp:718 #27 0x00007f407e31c75c in QApplicationPrivate::notify_helper (this=0x285f060, receiver=0x2a63b30, e=0x7fff89a8a480) at kernel/qapplication.cpp:4080 #28 0x00007f407e3250da in QApplication::notify (this=<value optimized out>, receiver=0x2a63b30, e=0x7fff89a8a480) at kernel/qapplication.cpp:3786 #29 0x00007f4080dc726b in KApplication::notify (this=0x7fff89a8b380, receiver=0x2a63b30, event=0x7fff89a8a480) at /build/buildd/kde4libs-4.2.2/kdeui/kernel/kapplication.cpp:307 #30 0x00007f407f13275c in QCoreApplication::notifyInternal (this=0x7fff89a8b380, receiver=0x2a63b30, event=0x7fff89a8a480) at kernel/qcoreapplication.cpp:602 #31 0x00007f407e324328 in QApplicationPrivate::sendMouseEvent (receiver=0x2a63b30, event=0x7fff89a8a480, alienWidget=0x2a63b30, nativeWidget=0x29df540, buttonDown=<value optimized out>, lastmousereceiv...@0x7f407ed80eb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216 #32 0x00007f407e38de19 in QETWidget::translateMouseEvent (this=0x29df540, event=<value optimized out>) at kernel/qapplication_x11.cpp:4425 #33 0x00007f407e38ca88 in QApplication::x11ProcessEvent (this=0x7fff89a8b380, event=0x7fff89a8afc0) at kernel/qapplication_x11.cpp:3543 #34 0x00007f407e3b5464 in x11EventSourceDispatch (s=0x2862ce0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146 #35 0x00007f407936820a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0 #36 0x00007f407936b8e0 in ?? () from /usr/lib/libglib-2.0.so.0 #37 0x00007f407936ba7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #38 0x00007f407f15be6f in QEventDispatcherGlib::processEvents (this=0x284b740, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323 #39 0x00007f407e3b4bef in QGuiEventDispatcherGlib::processEvents (this=0x7f40698ee9e0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202 #40 0x00007f407f131002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -1985432912}) at kernel/qeventloop.cpp:149 #41 0x00007f407f1313cd in QEventLoop::exec (this=0x7fff89a8b2f0, flags={i = -1985432832}) at kernel/qeventloop.cpp:200 #42 0x00007f407f133694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880 #43 0x0000000000443565 in main (argc=2, argv=0x7fff89a8b8d8) at /home/olo/misc/soft/Graphics/KDEnlive/kde4/kdenlive/kdenlive/src/main.cpp:86 Current language: auto; currently c #0 0x00007f405bbc3610 in ?? () (gdb) info threads * 25 Thread 0x7f40698ee950 (LWP 1740) 0x00007f405bbc3610 in ?? () 1 Thread 0x7f4081a4b750 (LWP 1714) 0x00007f407d211c95 in pthread_join (threadid=139914625608016, thread_return=0x0) at pthread_join.c:89 (gdb) quit The program is running. Exit anyway? (y or n) y Am I missing something in the build procedure? I'm not very familiar with cmake. Are there any additional compilation options that would result in binaries with more debug information? -- Best Regards, Aleksander Adamowski http://olo.org.pl ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. 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