Crash when exporting current frame

KDEnlive crashes when I export current frame to PNG. Tested with today's SVN version.

Here's a backtrace:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1249907824 (LWP 26182)]
0xb7fb6d67 in mlt_properties_count (this=0xb5932638) at mlt_properties.c:520
520     {
Current language:  auto; currently c
(gdb) info threads
  22 Thread -1223963760 (LWP 26184)  0x45b18568 in clone () from /lib/tls/i686/cmov/libc.so.6
* 21 Thread -1249907824 (LWP 26182)  0xb7fb6d67 in mlt_properties_count (this=0xb5932638) at mlt_properties.c:520
  1 Thread -1208682032 (LWP 26159)  0x45b18568 in clone () from /lib/tls/i686/cmov/libc.so.6
(gdb) list
515
516     /** Return the number of items in the list.
517     */
518
519     int mlt_properties_count( mlt_properties this )
520     {
521             property_list *list = this->local;
522             return list->count;
523     }
524
(gdb) thread apply all bt
[New Thread -1223963760 (LWP 26184)]

Thread 22 (Thread -1223963760 (LWP 26184)):
#0  0x45b18568 in clone () from /lib/tls/i686/cmov/libc.so.6
#1  0x007d0f00 in ?? ()
#2  0x00000000 in ?? ()

Thread 21 (Thread -1249907824 (LWP 26182)):
#0  0xb7fb6d67 in mlt_properties_count (this=0xb5932638) at mlt_properties.c:520
#1  0xb7fba323 in mlt_events_fire (this=0xb594a888, id=0xb7fc77a0 "consumer-stopped") at mlt_events.c:169
#2  0xb7fc157e in mlt_consumer_stopped (this=0xb594a888) at mlt_consumer.c:808
#3  0xb7ae540a in consumer_thread (arg=0xb594a888) at consumer_avformat.c:1105
#4  0x45bc031b in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0x45b1857e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread -1208682032 (LWP 26159)):
#0  0x45b18568 in clone () from /lib/tls/i686/cmov/libc.so.6
#1  0xb70bc4c0 in ?? ()
#2  0xb70bcb90 in ?? ()
#3  0x45bceff4 in ?? () from /lib/tls/i686/cmov/libpthread.so.0
#4  0x45bc0e1b in pthread_create@@GLIBC_2.1 () from /lib/tls/i686/cmov/libpthread.so.0
#5  0x45bc1238 in pthread_create@GLIBC_2.0 () from /lib/tls/i686/cmov/libpthread.so.0
#6  0xb7b0a9f6 in consumer_start (parent=0x84fd678) at consumer_sdl_still.c:204
#7  0xb7fc2244 in mlt_consumer_start (this=0x84fd678) at mlt_consumer.c:230
#8  0xb7b08e34 in consumer_start (parent=0x85ec0d0) at consumer_sdl_preview.c:208
#9  0xb7fc2244 in mlt_consumer_start (this=0x85ec0d0) at mlt_consumer.c:230
#10 0xb7f989d2 in Mlt::Consumer::start () from /usr/lib/libmlt++.so.0.2.3
#11 0x081646d0 in KRender::start (this=0x8473918) at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/krender.cpp:725
#12 0x0815c469 in Gui::KMMScreen::startRenderer (this=0x85eebe0) at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/kmmscreen.cpp:85
#13 0x081550a4 in Gui::KMMMonitor::slotSetActive (this=0x85e8b80) at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/kmmmonitor.cpp:164
#14 0x08184232 in Gui::MonitorManager::activateMonitor (this=0x8281434, monitor=0x85e8b80)
    at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/monitormanager.cpp:64
#15 0x0811ad0f in Gui::KdenliveApp::activateClipMonitor (this=0x8281208) at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/kdenlive.cpp:3821
#16 0x0811ad33 in Gui::KdenliveApp::slotFocusClipMonitor (this=0x8281208) at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/kdenlive.cpp:1757
#17 0x0811b34f in Gui::KdenliveApp::slotSetClipMonitorSource (this=0x8281208, clip=0xb5935070)
    at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/kdenlive.cpp:3750
#18 0x081da5d8 in Gui::KdenliveApp::qt_invoke (this=0x8281208, _id=144, _o=0xbfb6975c) at ./kdenlive/kdenlive.moc.cpp:704
#19 0x45408e4b in QObject::activate_signal (this=0x856ff48, clist=0x8502df8, o=0xbfb6975c) at kernel/qobject.cpp:2356
#20 0x081dc067 in Gui::ProjectList::clipSelected (this=0x856ff48, t0=0xb5935070) at ./kdenlive/projectlist.moc.cpp:178
#21 0x08189fc3 in Gui::ProjectList::updateListItem (this=0x856ff48) at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/projectlist.cpp:362
#22 0x0818a67f in Gui::ProjectList::selectItem (this=0x856ff48, id=15) at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/projectlist.cpp:280
#23 0x081dbeb2 in Gui::ProjectList::qt_invoke (this=0x856ff48, _id=56, _o=0xbfb698c8) at ./kdenlive/projectlist.moc.cpp:199
#24 0x45408e4b in QObject::activate_signal (this=0x8551908, clist=0x8570518, o=0xbfb698c8) at kernel/qobject.cpp:2356
#25 0x45409762 in QObject::activate_signal (this=0x8551908, signal=16, param=15) at kernel/qobject.cpp:2449
#26 0x081dd6ca in KdenliveDoc::selectProjectItem (this=0x8551908, t0=15) at ./kdenlive/kdenlivedoc.moc.cpp:390
#27 0x0813febd in KdenliveDoc::slotSelectProjectItem (this=0x8551908, id=15)
    at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/kdenlivedoc.cpp:320
#28 0x0811583a in Command::KAddClipCommand::addClip (this=0xb59307d0) at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/kaddclipcommand.cpp:263
#29 0x081158b4 in Command::KAddClipCommand::execute (this=0xb59307d0) at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/kaddclipcommand.cpp:226
#30 0x464d2525 in KCommandHistory::addCommand (this=0x831b9b8, command=0xb59307d0, execute=true) at /build/buildd/kdelibs-3.5.6/./kdeui/kcommand.cpp:176
#31 0x0811e586 in Gui::KdenliveApp::addCommand (this=0x8281208, command=0xb59307d0, execute=true)
    at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/kdenlive.cpp:2825
#32 0x08122f02 in Gui::KdenliveApp::slotProjectAddImageClip (this=0x8281208, imageUrl=@0xbfb69ba0)
    at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/kdenlive.cpp:3102
#33 0x08129edc in Gui::KdenliveApp::customEvent (this=0x8281208, e=0x8626000)
---Type  to continue, or q  to quit---
    at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/kdenlive.cpp:1634
#34 0x4540854d in QObject::event (this=0x8281208, e=0x8626000) at kernel/qobject.cpp:755
#35 0x4543fb4f in QWidget::event (this=0x8281208, e=0x8626000) at kernel/qwidget.cpp:4678
#36 0x45516166 in QMainWindow::event (this=0x8281208, e=0x8626000) at widgets/qmainwindow.cpp:1687
#37 0x453a0020 in QApplication::internalNotify (this=0xbfb6a39c, receiver=0x8281208, e=0x8626000) at kernel/qapplication.cpp:2635
#38 0x453a29ea in QApplication::notify (this=0xbfb6a39c, receiver=0x8281208, e=0x8626000) at kernel/qapplication.cpp:2523
#39 0x46252e82 in KApplication::notify (this=0xbfb6a39c, receiver=0x8281208, event=0x8626000) at /build/buildd/kdelibs-3.5.6/./kdecore/kapplication.cpp:550
#40 0x453327a9 in QApplication::sendEvent (receiver=0x8281208, event=0x8626000) at ../include/qapplication.h:520
#41 0x453a1058 in QApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qapplication.cpp:3299
#42 0x453a1160 in QApplication::sendPostedEvents () at kernel/qapplication.cpp:3210
#43 0x4534669d in QEventLoop::processEvents (this=0x826ca38, flags=4) at kernel/qeventloop_x11.cpp:144
#44 0x453ba6f6 in QEventLoop::enterLoop (this=0x826ca38) at kernel/qeventloop.cpp:198
#45 0x453ba506 in QEventLoop::exec (this=0x826ca38) at kernel/qeventloop.cpp:145
#46 0x453a1bc9 in QApplication::exec (this=0xbfb6a39c) at kernel/qapplication.cpp:2758
#47 0x0818416e in main (argc=136472940, argv=0xbfb6a514) at /home/opt/soft/Graphics/KDEnlive/SVN/build/2007-06-12/kdenlive/kdenlive/main.cpp:107
0xb7fb6d67      520     {
(gdb)

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