Entering note cause crash

I'm using musescore rev a8e8b7b.

Step to reproduce :
1- start musescore
2-create new score
3- try to enter note with keyboard
4-it crashes

here is the gdb output :

daeavelwyn@StudioCorei5:~/MuseScore/build.release/mscore$ gdb mscore
GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
...
Reading symbols from /home/daeavelwyn/MuseScore/build.release/mscore/mscore...done.
(gdb) run
Starting program: /home/daeavelwyn/MuseScore/build.release/mscore/mscore
warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7ffff7ffa000
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe7850700 (LWP 8049)]
read shortcuts from <:/data/shortcuts.xml>
Information for screen: "DVI-0"
Available geometry: 1600 50 1920 x 1030
Available size: 1920 x 1030
Available virtual geometry: 0 50 3520 x 1030
Available virtual size: 3520 x 1030
Depth: 24 bits
Geometry: 1600 0 1920 x 1080
Logical DPI: 96.4682
Logical DPI X: 96.3448
Logical DPI Y: 96.5915
Physical DPI: 102.299
Physical DPI X: 102.239
Physical DPI Y: 102.358
Physical size: 477 x 268 mm
Refresh rate: 60 Hz
Size: 1920 x 1080
Virtual geometry: 0 0 3520 x 1080
Virtual size: 3520 x 1080
no audio driver found
ChordList::read failed:
QObject::connect: Cannot connect QState::entered() to (null)::start()
QObject::connect: Cannot connect QState::exited() to (null)::stop()
QObject::connect: Cannot connect QState::entered() to (null)::start()
QObject::connect: Cannot connect QState::exited() to (null)::stop()
expand voice: found Rest 4/4
addClone Rest at 480 1/4
addClone Rest at 960 1/2

Program received signal SIGSEGV, Segmentation fault.
0x00000000006f1b76 in Ms::MuseScore::play(Ms::Element*, int) const () at /home/daeavelwyn/MuseScore/mscore/musescore.cpp:2749
2749 seq->startNote(channel.channel, pitch, 80, MScore::defaultPlayDuration, note->tuning());
(gdb) backtrace
#0 0x00000000006f1b76 in Ms::MuseScore::play(Ms::Element*, int) const () at /home/daeavelwyn/MuseScore/mscore/musescore.cpp:2749
#1 0x00000000006f589d in Ms::MuseScore::play(Ms::Element*) const () at /home/daeavelwyn/MuseScore/mscore/musescore.cpp:2722
#2 0x00000000006f5b10 in Ms::MuseScore::endCmd() () at /home/daeavelwyn/MuseScore/mscore/musescore.cpp:3932
#3 0x0000000000708cf9 in Ms::MuseScore::cmd(QAction*) () at /home/daeavelwyn/MuseScore/mscore/musescore.cpp:3913
#4 0x00000000006337b5 in Ms::MuseScore::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /home/daeavelwyn/MuseScore/build.release/mscore/moc_musescore.cpp:817
#5 0x00007ffff7275261 in QMetaObject::activate(QObject*, int, int, void**) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5
#6 0x00007ffff54834cf in QActionGroup::triggered(QAction*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5
#7 0x00007ffff5483ca9 in ?? () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5
#8 0x00007ffff7275261 in QMetaObject::activate(QObject*, int, int, void**) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5
#9 0x00007ffff547fba2 in QAction::triggered(bool) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5
#10 0x00007ffff54819d7 in QAction::activate(QAction::ActionEvent) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5
#11 0x00007ffff5481ccf in QAction::event(QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5
#12 0x00007ffff548ab54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5
#13 0x00007ffff548dfe6 in QApplication::notify(QObject*, QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5
#14 0x00007ffff724ddd4 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5
#15 0x00007ffff6a98e91 in QShortcutMap::dispatchEvent(QKeyEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Gui.so.5
#16 0x00007ffff6a99d8a in QShortcutMap::tryShortcutEvent(QObject*, QKeyEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Gui.so.5
#17 0x00007ffff548df88 in QApplication::notify(QObject*, QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5
#18 0x00007ffff724ddd4 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5
#19 0x00007ffff6a6e714 in QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Gui.so.5
#20 0x00007ffff6a7792d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Gui.so.5
#21 0x00007ffff6a60a98 in QWindowSystemInterface::sendWindowSystemEventsImplementation(QFlags) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Gui.so.5
#22 0x00007fffe848d940 in ?? () from /opt/Qt5.1.1/5.1.1/gcc_64/plugins/platforms/libqxcb.so
#23 0x00007fffef4a2d13 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fffef4a3060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fffef4a3124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007ffff7298314 in QEventDispatcherGlib::processEvents(QFlags) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5
#27 0x00007ffff724cb6b in QEventLoop::exec(QFlags) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5
#28 0x00007ffff7250bbe in QCoreApplication::exec() () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5
#29 0x0000000000623607 in main () at /home/daeavelwyn/MuseScore/mscore/musescore.cpp:4991
(gdb)