i-score crash when creating an event

gistfile1.txt

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   org.i-score                   	0x000000010a09a5ff ScenarioCreationState::makeSnapshot() + 495
1   org.i-score                   	0x000000010a08feaf QtPrivate::QFunctorSlotObject<ScenarioCreation_FromState::ScenarioCreation_FromState(ScenarioStateMachine const&, Path<ScenarioModel> const&, iscore::CommandStack&, QState*)::$_17, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) + 31
2   org.qt-project.QtCore         	0x000000010b76b6c0 QMetaObject::activate(QObject*, int, int, void**) + 2528
3   org.qt-project.QtCore         	0x000000010b7b7e86 QAbstractStatePrivate::emitEntered() + 22
4   org.qt-project.QtCore         	0x000000010b7a2935 QStateMachinePrivate::enterStates(QEvent*, QList<QAbstractState*> const&, QList<QAbstractState*> const&, QSet<QAbstractState*> const&, QHash<QAbstractState*, QList<QPropertyAssignment> >&, QList<QAbstractAnimation*> const&) + 741
5   org.qt-project.QtCore         	0x000000010b7a08aa QStateMachinePrivate::microstep(QEvent*, QList<QAbstractTransition*> const&, CalculationCache*) + 490
6   org.qt-project.QtCore         	0x000000010b7a9ac7 QStateMachinePrivate::_q_process() + 951
7   org.qt-project.QtCore         	0x000000010b76427c QObject::event(QEvent*) + 156
8   org.qt-project.QtCore         	0x000000010b7ad160 QStateMachine::event(QEvent*) + 384
9   org.qt-project.QtWidgets      	0x000000010a8dc96b QApplicationPrivate::notify_helper(QObject*, QEvent*) + 251
10  org.qt-project.QtWidgets      	0x000000010a8df2ce QApplication::notify(QObject*, QEvent*) + 5630
11  org.i-score                   	0x0000000109f3d155 SafeQApplication::notify(QObject*, QEvent*) + 21
12  org.qt-project.QtCore         	0x000000010b73c302 QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) + 1058
13  libqcocoa.dylib               	0x000000010d5a8b0e QCocoaEventDispatcherPrivate::processPostedEvents() + 190
14  libqcocoa.dylib               	0x000000010d5a9391 QCocoaEventDispatcherPrivate::postedEventsSourceCallback(void*) + 33
15  com.apple.CoreFoundation      	0x00007fff8fb18a01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
16  com.apple.CoreFoundation      	0x00007fff8fb0ab8d __CFRunLoopDoSources0 + 269
17  com.apple.CoreFoundation      	0x00007fff8fb0a1bf __CFRunLoopRun + 927
18  com.apple.CoreFoundation      	0x00007fff8fb09bd8 CFRunLoopRunSpecific + 296
19  com.apple.HIToolbox           	0x00007fff9a26156f RunCurrentEventLoopInMode + 235
20  com.apple.HIToolbox           	0x00007fff9a2612ea ReceiveNextEventCommon + 431
21  com.apple.HIToolbox           	0x00007fff9a26112b _BlockUntilNextEventMatchingListInModeWithFilter + 71
22  com.apple.AppKit              	0x00007fff912a58ab _DPSNextEvent + 978
23  com.apple.AppKit              	0x00007fff912a4e58 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 346
24  com.apple.AppKit              	0x00007fff9129aaf3 -[NSApplication run] + 594
25  libqcocoa.dylib               	0x000000010d5a82df QCocoaEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 2191
26  org.qt-project.QtCore         	0x000000010b738d0c QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 412
27  org.qt-project.QtCore         	0x000000010b73bb85 QCoreApplication::exec() + 341
28  org.i-score                   	0x0000000109f28548 main + 72
29  libdyld.dylib                 	0x00007fff9a58b5c9 start + 1