Most likely same problem as what is described in comment 0006428 in issue 0002621

After updating to r21137 I now get this crash...

(Reproduce this by going to Modules->Testing->TestCases->RSNA2012Quant and running the ChangeTracker test)

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libMRMLDisplayableManager.dylib 0x00000001132768ec std::vector<vtkMRMLDisplayNode, std::allocator<vtkMRMLDisplayNode> >::size() const + 12 (stl_vector.h:400)
1 libMRMLCore.dylib 0x0000000116c5dff8 vtkMRMLDisplayableNode::GetNthDisplayNode(int) + 40 (vtkMRMLDisplayableNode.cxx:223)
2 libqSlicerBaseQTCLI.dylib 0x000000010f1c1d7a vtkMRMLDisplayableNode::GetDisplayNode() + 26 (vtkMRMLDisplayableNode.h:244)
3 libvtkSlicerVolumeRenderingModuleLogic.dylib 0x0000000130235689 vtkSlicerVolumeRenderingLogic::CopyDisplayToVolumeRenderingDisplayNode(vtkMRMLVolumeRenderingDisplayNode, vtkMRMLVolumeDisplayNode) + 121 (vtkSlicerVolumeRenderingLogic.cxx:570)
4 libvtkSlicerVolumeRenderingModuleLogicPythonD.dylib 0x000000013021dd14 PyvtkSlicerVolumeRenderingLogic_CopyDisplayToVolumeRenderingDisplayNode(_object, _object) + 260 (vtkSlicerVolumeRenderingLogicPython.cxx:456)
5 libpython2.6.dylib 0x00000001169a7d87 PyEval_EvalFrameEx + 16839 (ceval.c:3750)
6 libpython2.6.dylib 0x00000001169ab083 fast_function + 179 (ceval.c:3836)
7 libpython2.6.dylib 0x00000001169a7e39 PyEval_EvalFrameEx + 17017 (ceval.c:3771)
8 libpython2.6.dylib 0x00000001169ab083 fast_function + 179 (ceval.c:3836)
9 libpython2.6.dylib 0x00000001169a7e39 PyEval_EvalFrameEx + 17017 (ceval.c:3771)
10 libpython2.6.dylib 0x00000001169aaf4e PyEval_EvalCodeEx + 2126 (ceval.c:3000)
11 libpython2.6.dylib 0x000000011693daba function_call + 394 (funcobject.c:524)
12 libpython2.6.dylib 0x0000000116916431 PyObject_Call + 97 (abstract.c:2492)
13 libpython2.6.dylib 0x00000001169282cf instancemethod_call + 495 (classobject.c:2580)
14 libpython2.6.dylib 0x0000000116916431 PyObject_Call + 97 (abstract.c:2492)
15 libpython2.6.dylib 0x00000001169a30f4 PyEval_CallObjectWithKeywords + 180 (ceval.c:3620)
16 libPythonQt.dylib 0x0000000113b605e2 PythonQtSignalTarget::call(_object, PythonQtMethodInfo const, void, bool) + 594 (PythonQtSignalReceiver.cpp:124)
17 libPythonQt.dylib 0x0000000113b60339 PythonQtSignalTarget::call(void) const + 73 (PythonQtSignalReceiver.cpp:55)
18 libPythonQt.dylib 0x0000000113b610b5 PythonQtSignalReceiver::qt_metacall(QMetaObject::Call, int, void) + 261 (PythonQtSignalReceiver.cpp:259)
19 QtCore 0x000000011abdc775 QMetaObject::activate(QObject, QMetaObject const, int, void) + 1781
20 libqMRMLWidgets.dylib 0x000000010f688f9d qMRMLNodeComboBox::currentNodeChanged(vtkMRMLNode) + 77 (moc_qMRMLNodeComboBox.cxx:260)
21 libqMRMLWidgets.dylib 0x000000010f60eaa8 qMRMLNodeComboBox::emitCurrentNodeChanged() + 184 (qMRMLNodeComboBox.cxx:508)
22 libqMRMLWidgets.dylib 0x000000010f688d64 qMRMLNodeComboBox::qt_static_metacall(QObject, QMetaObject::Call, int, void) + 612 (moc_qMRMLNodeComboBox.cxx:142)
23 QtCore 0x000000011abdc851 QMetaObject::activate(QObject, QMetaObject const, int, void) + 2001
24 QtGui 0x000000011a23c7a6 QComboBoxPrivate::_q_emitCurrentIndexChanged(QModelIndex const&) + 134
25 QtGui 0x000000011a23d102 QComboBoxPrivate::setCurrentIndex(QModelIndex const&) + 738
26 QtGui 0x000000011a23d52c QComboBoxPrivate::_q_itemSelected(QModelIndex const&) + 88
27 QtGui 0x000000011a239043 QComboBox::qt_static_metacall(QObject*, QMetaObject::Call, int, void) + 617
28 QtCore 0x000000011abdc851 QMetaObject::activate(QObject, QMetaObject const, int, void) + 2001
29 QtGui 0x000000011a4b1512 QComboBoxPrivateContainer::itemSelected(QModelIndex const&) + 38
30 QtGui 0x000000011a23dd01 QComboBoxPrivateContainer::eventFilter(QObject, QEvent) + 435
31 QtCore 0x000000011abc5eb1 QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject, QEvent) + 155
32 QtGui 0x0000000119ed3998 QApplicationPrivate::notify_helper(QObject, QEvent) + 288
33 QtGui 0x0000000119ed3f1c QApplication::notify(QObject, QEvent) + 1358
34 QtCore 0x000000011abc7a26 QCoreApplication::notifyInternal(QObject, QEvent) + 104
35 libqMRMLWidgets.dylib 0x000000010f61050a QCoreApplication::sendEvent(QObject, QEvent) + 90 (qcoreapplication.h:231)
36 libqMRMLWidgets.dylib 0x000000010f60f378 qMRMLNodeComboBox::setCurrentNode(QString const&) + 888 (qMRMLNodeComboBox.cxx:654)
37 libqMRMLWidgets.dylib 0x000000010f60e5fe qMRMLNodeComboBox::setCurrentNode(vtkMRMLNode) + 110 (qMRMLNodeComboBox.cxx:611)
38 libqMRMLWidgets.dylib 0x000000010f688c95 qMRMLNodeComboBox::qt_static_metacall(QObject, QMetaObject::Call, int, void) + 405 (moc_qMRMLNodeComboBox.cxx:133)
39 libqMRMLWidgets.dylib 0x000000010f689441 qMRMLNodeComboBox::qt_metacall(QMetaObject::Call, int, void) + 129 (moc_qMRMLNodeComboBox.cxx:200)
40 libPythonQt.dylib 0x0000000113b62ddb PythonQtCallSlot(PythonQtClassInfo, QObject, _object, bool, PythonQtSlotInfo, void, _object, void) + 1643 (PythonQtSlot.cpp:171)
41 libPythonQt.dylib 0x0000000113b64560 PythonQtSlotFunction_CallImpl(PythonQtClassInfo, QObject, PythonQtSlotInfo, _object, _object, void*, void) + 304 (PythonQtSlot.cpp:312)
42 libPythonQt.dylib 0x0000000113b639fa PythonQtMemberFunction_Call(PythonQtSlotInfo, _object, _object, _object) + 810 (PythonQtSlot.cpp:250)
43 libPythonQt.dylib 0x0000000113b636c9 PythonQtSlotFunction_Call(_object, _object, _object) + 57 (PythonQtSlot.cpp:238)
44 libpython2.6.dylib 0x0000000116916431 PyObject_Call + 97 (abstract.c:2492)
45 libpython2.6.dylib 0x00000001169a8055 PyEval_EvalFrameEx + 17557 (ceval.c:3968)
46 libpython2.6.dylib 0x00000001169ab083 fast_function + 179 (ceval.c:3836)
47 libpython2.6.dylib 0x00000001169a7e39 PyEval_EvalFrameEx + 17017 (ceval.c:3771)
48 libpython2.6.dylib 0x00000001169aaf4e PyEval_EvalCodeEx + 2126 (ceval.c:3000)
49 libpython2.6.dylib 0x000000011693daba function_call + 394 (funcobject.c:524)
50 libpython2.6.dylib 0x0000000116916431 PyObject_Call + 97 (abstract.c:2492)
51 libpython2.6.dylib 0x00000001169282cf instancemethod_call + 495 (classobject.c:2580)
52 libpython2.6.dylib 0x0000000116916431 PyObject_Call + 97 (abstract.c:2492)
53 libpython2.6.dylib 0x00000001169a30f4 PyEval_CallObjectWithKeywords + 180 (ceval.c:3620)
54 libPythonQt.dylib 0x0000000113b605e2 PythonQtSignalTarget::call(_object, PythonQtMethodInfo const*, void, bool) + 594 (PythonQtSignalReceiver.cpp:124)
55 libPythonQt.dylib 0x0000000113b60339 PythonQtSignalTarget::call(void) const + 73 (PythonQtSignalReceiver.cpp:55)
56 libPythonQt.dylib 0x0000000113b610b5 PythonQtSignalReceiver::qt_metacall(QMetaObject::Call, int, void) + 261 (PythonQtSignalReceiver.cpp:259)
57 QtCore 0x000000011abdc775 QMetaObject::activate(QObject, QMetaObject const, int, void) + 1781
58 libCTKCore.0.1.dylib 0x000000011579003d ctkWorkflowStepPrivate::invokeOnEntryCommand(ctkWorkflowStep const, ctkWorkflowInterstepTransition::InterstepTransitionType) const + 93 (moc_ctkWorkflowStep_p.cxx:132)
59 libCTKCore.0.1.dylib 0x000000011578a633 ctkWorkflowStepPrivate::invokeOnEntryCommandInternal(ctkWorkflowStep const, ctkWorkflowInterstepTransition::InterstepTransitionType) const + 35 (ctkWorkflowStep.cpp:117)
60 libCTKCore.0.1.dylib 0x000000011578b280 ctkWorkflowStep::invokeOnEntryCommand(ctkWorkflowStep const, ctkWorkflowInterstepTransition::InterstepTransitionType) const + 48 (ctkWorkflowStep.cpp:250)
61 libCTKCore.0.1.dylib 0x0000000115782c70 ctkWorkflowPrivate::onEntryInternal(ctkWorkflowStep, ctkWorkflowStep, ctkWorkflowInterstepTransition::InterstepTransitionType const&) + 368 (ctkWorkflow.cpp:361)
62 libCTKCore.0.1.dylib 0x0000000115783110 ctkWorkflowPrivate::processingAfterOnExit() + 64 (ctkWorkflow.cpp:457)
63 libCTKCore.0.1.dylib 0x000000011578fc04 ctkWorkflowPrivate::qt_static_metacall(QObject, QMetaObject::Call, int, void) + 164 (moc_ctkWorkflow_p.cxx:52)
64 QtCore 0x000000011abdc851 QMetaObject::activate(QObject, QMetaObject const, int, void) + 2001
65 libCTKCore.0.1.dylib 0x000000011579014b ctkWorkflowStepPrivate::onExitComplete() const + 43 (moc_ctkWorkflowStep_p.cxx:152)
66 libCTKCore.0.1.dylib 0x000000011578fecd ctkWorkflowStepPrivate::qt_static_metacall(QObject*, QMetaObject::Call, int, void) + 301 (moc_ctkWorkflowStep_p.cxx:69)
67 libCTKCore.0.1.dylib 0x00000001157902ce ctkWorkflowStepPrivate::qt_metacall(QMetaObject::Call, int, void) + 126 (moc_ctkWorkflowStep_p.cxx:109)
68 libCTKWidgets.0.1.dylib 0x00000001106f0193 ctkWorkflowWidgetStepPrivate::qt_metacall(QMetaObject::Call, int, void) + 51 (moc_ctkWorkflowWidgetStep_p.cxx:99)
69 libPythonQt.dylib 0x0000000113b62ddb PythonQtCallSlot(PythonQtClassInfo, QObject, _object, bool, PythonQtSlotInfo, void, _object, void) + 1643 (PythonQtSlot.cpp:171)
70 libPythonQt.dylib 0x0000000113b648a8 PythonQtSlotFunction_CallImpl(PythonQtClassInfo, QObject, PythonQtSlotInfo, _object, _object, void*, void) + 1144 (PythonQtSlot.cpp:338)
71 libPythonQt.dylib 0x0000000113b639fa PythonQtMemberFunction_Call(PythonQtSlotInfo, _object, _object, _object) + 810 (PythonQtSlot.cpp:250)
72 libPythonQt.dylib 0x0000000113b66179 PythonQtSignalFunction_Call(_object, _object, _object) + 57 (PythonQtSignal.cpp:64)
73 libpython2.6.dylib 0x0000000116916431 PyObject_Call + 97 (abstract.c:2492)
74 libpython2.6.dylib 0x00000001169a8055 PyEval_EvalFrameEx + 17557 (ceval.c:3968)
75 libpython2.6.dylib 0x00000001169aaf4e PyEval_EvalCodeEx + 2126 (ceval.c:3000)
76 libpython2.6.dylib 0x00000001169ab0f8 fast_function + 296 (ceval.c:3846)
77 libpython2.6.dylib 0x00000001169a7e39 PyEval_EvalFrameEx + 17017 (ceval.c:3771)
78 libpython2.6.dylib 0x00000001169ab083 fast_function + 179 (ceval.c:3836)
79 libpython2.6.dylib 0x00000001169a7e39 PyEval_EvalFrameEx + 17017 (ceval.c:3771)
80 libpython2.6.dylib 0x00000001169aaf4e PyEval_EvalCodeEx + 2126 (ceval.c:3000)
81 libpython2.6.dylib 0x000000011693daba function_call + 394 (funcobject.c:524)
82 libpython2.6.dylib 0x0000000116916431 PyObject_Call + 97 (abstract.c:2492)
83 libpython2.6.dylib 0x00000001169282cf instancemethod_call + 495 (classobject.c:2580)
84 libpython2.6.dylib 0x0000000116916431 PyObject_Call + 97 (abstract.c:2492)
85 libpython2.6.dylib 0x00000001169a30f4 PyEval_CallObjectWithKeywords + 180 (ceval.c:3620)
86 libPythonQt.dylib 0x0000000113b605e2 PythonQtSignalTarget::call(_object, PythonQtMethodInfo const*, void, bool) + 594 (PythonQtSignalReceiver.cpp:124)
87 libPythonQt.dylib 0x0000000113b60339 PythonQtSignalTarget::call(void) const + 73 (PythonQtSignalReceiver.cpp:55)
88 libPythonQt.dylib 0x0000000113b610b5 PythonQtSignalReceiver::qt_metacall(QMetaObject::Call, int, void) + 261 (PythonQtSignalReceiver.cpp:259)
89 QtCore 0x000000011abdc775 QMetaObject::activate(QObject, QMetaObject const, int, void) + 1781
90 libCTKCore.0.1.dylib 0x00000001157900fd ctkWorkflowStepPrivate::invokeOnExitCommand(ctkWorkflowStep const, ctkWorkflowInterstepTransition::InterstepTransitionType) const + 93 (moc_ctkWorkflowStep_p.cxx:145)
91 libCTKCore.0.1.dylib 0x000000011578a663 ctkWorkflowStepPrivate::invokeOnExitCommandInternal(ctkWorkflowStep const, ctkWorkflowInterstepTransition::InterstepTransitionType) const + 35 (ctkWorkflowStep.cpp:123)
92 libCTKCore.0.1.dylib 0x000000011578b2c0 ctkWorkflowStep::invokeOnExitCommand(ctkWorkflowStep const, ctkWorkflowInterstepTransition::InterstepTransitionType) const + 48 (ctkWorkflowStep.cpp:257)
93 libCTKCore.0.1.dylib 0x0000000115783040 ctkWorkflowPrivate::onExitInternal(ctkWorkflowStep, ctkWorkflowStep, ctkWorkflowInterstepTransition::InterstepTransitionType const&) + 368 (ctkWorkflow.cpp:443)
94 libCTKCore.0.1.dylib 0x0000000115785bd7 ctkWorkflow::performTransitionBetweenSteps() + 471 (ctkWorkflow.cpp:1067)
95 libCTKCore.0.1.dylib 0x000000011578ee36 ctkWorkflow::qt_static_metacall(QObject, QMetaObject::Call, int, void) + 614 (moc_ctkWorkflow.cxx:141)
96 QtCore 0x000000011abdc851 QMetaObject::activate(QObject, QMetaObject const, int, void) + 2001
97 QtCore 0x000000011ac0389f QStateMachinePrivate::executeTransitionContent(QEvent, QList<QAbstractTransition> const&) + 103
98 QtCore 0x000000011ac0401e QStateMachinePrivate::microstep(QEvent, QList<QAbstractTransition> const&) + 54
99 QtCore 0x000000011ac03df3 QStateMachinePrivate::_q_process() + 547
100 QtCore 0x000000011abdb9c4 QObject::event(QEvent) + 286
101 QtCore 0x000000011ac0c0b1 QAbstractState::event(QEvent) + 9
102 QtCore 0x000000011ac0c437 QState::event(QEvent) + 43
103 QtCore 0x000000011abffe80 QStateMachine::event(QEvent) + 296
104 QtGui 0x0000000119ed39a8 QApplicationPrivate::notify_helper(QObject, QEvent) + 304
105 QtGui 0x0000000119ed3c29 QApplication::notify(QObject, QEvent) + 603
106 QtCore 0x000000011abc7a26 QCoreApplication::notifyInternal(QObject, QEvent) + 104
107 QtCore 0x000000011abc7e13 QCoreApplicationPrivate::sendPostedEvents(QObject, int, QThreadData) + 557
108 com.apple.CoreFoundation 0x00007fff83b23101 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
109 com.apple.CoreFoundation 0x00007fff83b22a25 CFRunLoopDoSources0 + 245
110 com.apple.CoreFoundation 0x00007fff83b45dc5 CFRunLoopRun + 789
111 com.apple.CoreFoundation 0x00007fff83b456b2 CFRunLoopRunSpecific + 290
112 com.apple.HIToolbox 0x00007fff84b700a4 RunCurrentEventLoopInMode + 209
113 com.apple.HIToolbox 0x00007fff84b6fd84 ReceiveNextEventCommon + 166
114 com.apple.HIToolbox 0x00007fff84b6fcd3 BlockUntilNextEventMatchingListInMode + 62
115 com.apple.AppKit 0x00007fff88766613 _DPSNextEvent + 685
116 com.apple.AppKit 0x00007fff88765ed2 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
117 com.apple.AppKit 0x00007fff889b0709 -[NSApplication _realDoModalLoop:peek:] + 485
118 com.apple.AppKit 0x00007fff889b0e3e -[NSApplication runModalSession:] + 49
119 QtGui 0x0000000119e8f50f QEventDispatcherMac::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 679
120 QtCore 0x000000011abc4e88 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 394
121 QtGui 0x000000011a30e583 QDialog::exec() + 243
122 QtGui 0x000000011a30cb3c QDialog::qt_static_metacall(QObject*, QMetaObject::Call, int, void) + 134
123 QtGui 0x000000011a30e683 QDialog::qt_metacall(QMetaObject::Call, int, void) + 97
124 libPythonQt.dylib 0x0000000113b62ddb PythonQtCallSlot(PythonQtClassInfo, QObject, _object, bool, PythonQtSlotInfo, void, _object, void) + 1643 (PythonQtSlot.cpp:171)
125 libPythonQt.dylib 0x0000000113b648a8 PythonQtSlotFunction_CallImpl(PythonQtClassInfo, QObject, PythonQtSlotInfo, _object, _object, void*, void*) + 1144 (PythonQtSlot.cpp:338)
126 libPythonQt.dylib 0x0000000113b639fa PythonQtMemberFunction_Call(PythonQtSlotInfo, _object, _object, _object) + 810 (PythonQtSlot.cpp:250)
127 libPythonQt.dylib 0x0000000113b636c9 PythonQtSlotFunction_Call(_object, _object, _object) + 57 (PythonQtSlot.cpp:238)
128 libpython2.6.dylib 0x0000000116916431 PyObject_Call + 97 (abstract.c:2492)
129 libpython2.6.dylib 0x00000001169a8055 PyEval_EvalFrameEx + 17557 (ceval.c:3968)
130 libpython2.6.dylib 0x00000001169aaf4e PyEval_EvalCodeEx + 2126 (ceval.c:3000)
131 libpython2.6.dylib 0x00000001169ab0f8 fast_function + 296 (ceval.c:3846)
132 libpython2.6.dylib 0x00000001169a7e39 PyEval_EvalFrameEx + 17017 (ceval.c:3771)
133 libpython2.6.dylib 0x00000001169ab083 fast_function + 179 (ceval.c:3836)
134 libpython2.6.dylib 0x00000001169a7e39 PyEval_EvalFrameEx + 17017 (ceval.c:3771)
135 libpython2.6.dylib 0x00000001169aaf4e PyEval_EvalCodeEx + 2126 (ceval.c:3000)
136 libpython2.6.dylib 0x000000011693daba function_call + 394 (funcobject.c:524)
137 libpython2.6.dylib 0x0000000116916431 PyObject_Call + 97 (abstract.c:2492)
138 libpython2.6.dylib 0x00000001169282cf instancemethod_call + 495 (classobject.c:2580)
139 libpython2.6.dylib 0x0000000116916431 PyObject_Call + 97 (abstract.c:2492)
140 libpython2.6.dylib 0x00000001169a30f4 PyEval_CallObjectWithKeywords + 180 (ceval.c:3620)
141 libPythonQt.dylib 0x0000000113b605e2 PythonQtSignalTarget::call(_object, PythonQtMethodInfo const, void, bool) + 594 (PythonQtSignalReceiver.cpp:124)
142 libPythonQt.dylib 0x0000000113b60339 PythonQtSignalTarget::call(void) const + 73 (PythonQtSignalReceiver.cpp:55)
143 libPythonQt.dylib 0x0000000113b610b5 PythonQtSignalReceiver::qt_metacall(QMetaObject::Call, int, void) + 261 (PythonQtSignalReceiver.cpp:259)
144 QtCore 0x000000011abdc775 QMetaObject::activate(QObject, QMetaObject const, int, void) + 1781
145 QtGui 0x000000011a4b03d1 QAbstractButton::clicked(bool) + 49
146 QtGui 0x000000011a22446e QAbstractButtonPrivate::emitClicked() + 50
147 QtGui 0x000000011a22518a QAbstractButtonPrivate::click() + 230
148 QtGui 0x000000011a22534c QAbstractButton::mouseReleaseEvent(QMouseEvent) + 106
149 libPythonQt.dylib 0x0000000113e20e80 PythonQtShell_QPushButton::mouseReleaseEvent(QMouseEvent) + 416 (com_trolltech_qt_gui6.cpp:10329)
150 QtGui 0x0000000119f1e542 QWidget::event(QEvent) + 284
151 QtGui 0x000000011a224436 QAbstractButton::event(QEvent) + 220
152 QtGui 0x000000011a2b16f2 QPushButton::event(QEvent) + 168
153 libPythonQt.dylib 0x0000000113e1e88e PythonQtShell_QPushButton::event(QEvent) + 574 (com_trolltech_qt_gui6.cpp:9957)
154 QtGui 0x0000000119ed39a8 QApplicationPrivate::notify_helper(QObject, QEvent) + 304
155 QtGui 0x0000000119ed42f8 QApplication::notify(QObject, QEvent) + 2346
156 QtCore 0x000000011abc7a26 QCoreApplication::notifyInternal(QObject, QEvent) + 104
157 QtGui 0x0000000119edbf68 QApplicationPrivate::sendMouseEvent(QWidget, QMouseEvent, QWidget, QWidget, QWidget, QPointer<QWidget>&, bool) + 432
158 QtGui 0x0000000119e8b2b1 qt_mac_handleMouseEvent(NSEvent, QEvent::Type, Qt::MouseButton, QWidget, bool) + 993
159 com.apple.AppKit 0x00007fff8884b6d6 -[NSWindow sendEvent:] + 7053
160 QtGui 0x0000000119e82a32 -[QCocoaWindow sendEvent:] + 114
161 com.apple.AppKit 0x00007fff88847744 -[NSApplication sendEvent:] + 5761
162 QtGui 0x0000000119e86342 -[QNSApplication sendEvent:] + 82
163 com.apple.AppKit 0x00007fff8875d2fa -[NSApplication run] + 636
164 QtGui 0x0000000119e8f5b0 QEventDispatcherMac::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 840
165 QtCore 0x000000011abc4e88 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 394
166 QtCore 0x000000011abc815b QCoreApplication::exec() + 175
167 0x000000010eff26bb (anonymous namespace)::SlicerAppMain(int, char**) + 4155 (Main.cxx:292)
168 0x000000010eff1672 main + 34 (Main.cxx:324)
169 libdyld.dylib 0x00007fff8c9377e1 start + 1

I tested this after the previous change of Julien, and the test ran for me without crash including the scene close. Will update and test again.

Crash is reproducible outside ChangeTracker as follows:

1) download brain tumor 1 from sample data
2) create ROI
3) execfile the following script:

vrNode = slicer.modules.volumerendering.logic().CreateVolumeRenderingDisplayNode()
vrNode.SetReferenceCount(vrNode.GetReferenceCount()-1)
print(str(vrNode.GetReferenceCount()))
vs = slicer.mrmlScene.GetNodesByClass('vtkMRMLScalarVolumeNode')
v = vs.GetItemAsObject(0)

rs = slicer.mrmlScene.GetNodesByClass('vtkMRMLAnnotationROINode')
r = rs.GetItemAsObject(0)

vrLogic = slicer.modules.volumerendering.logic()
propNode = vrNode.GetVolumePropertyNode()

if propNode == None:
propNode = slicer.vtkMRMLVolumePropertyNode()
slicer.mrmlScene.AddNode(propNode)

vrNode.SetAndObserveVolumePropertyNodeID(propNode.GetID())
vrNode.SetAndObserveROINodeID(r.GetID())
vrNode.SetAndObserveVolumeNodeID(v.GetID())
vrLogic.CopyDisplayToVolumeRenderingDisplayNode(vrNode)
vrNode.VisibilityOn()
slicer.mrmlScene.AddNode(vrNode)

Julien: I tested this with r21138. I dereference the node, and add manually to the scene. Am I doing something incorrectly? Is this a VR issue?

In that script the display node is not added into the displayable node. (see comment 0006442 in 0002621).
To decrement, I would prefer vrNode.UnRegister(slicer.modules.volumerendering.logic())

Ok, script updated as you suggested, but the crash is the same.

vrNode = slicer.modules.volumerendering.logic().CreateVolumeRenderingDisplayNode()
vrNode.UnRegister(slicer.modules.volumerendering.logic())

vrNode.SetReferenceCount(vrNode.GetReferenceCount()-1)

print(str(vrNode.GetReferenceCount()))
vs = slicer.mrmlScene.GetNodesByClass('vtkMRMLScalarVolumeNode')
v = vs.GetItemAsObject(0)

rs = slicer.mrmlScene.GetNodesByClass('vtkMRMLAnnotationROINode')
r = rs.GetItemAsObject(0)

vrLogic = slicer.modules.volumerendering.logic()
propNode = vrNode.GetVolumePropertyNode()

if propNode == None:
propNode = slicer.vtkMRMLVolumePropertyNode()
slicer.mrmlScene.AddNode(propNode)

vrNode.SetAndObserveVolumePropertyNodeID(propNode.GetID())
vrNode.SetAndObserveROINodeID(r.GetID())
vrNode.SetAndObserveVolumeNodeID(v.GetID())
v.AddAndObserveDisplayNodeID(vrNode.GetID())
vrLogic.CopyDisplayToVolumeRenderingDisplayNode(vrNode)
vrNode.VisibilityOn()
slicer.mrmlScene.AddNode(vrNode)

Crash fixed in r21141

The root problem is that the vrNode is added in the scene after CopyDisplayToVolumeRenderingDisplayNode() . But CopyDisplayToVolumeRenderingDisplayNode() needs a pointer to the volume node v and vrNode can't return any reference pointers if it is not added to the scene first.

So I would suggest instead:
vrNode = slicer.modules.volumerendering.logic().CreateVolumeRenderingDisplayNode()
slicer.mrmlScene.AddNode(vrNode)
vrNode.UnRegister(slicer.modules.volumerendering.logic())
...
vrNode.VisibilityOn()

Julien, thanks, no crash anymore!

Now if I run this same script:

vrNode = slicer.modules.volumerendering.logic().CreateVolumeRenderingDisplayNode()
slicer.mrmlScene.AddNode(vrNode)
vrNode.UnRegister(slicer.modules.volumerendering.logic())

vrNode.SetReferenceCount(vrNode.GetReferenceCount()-1)

print(str(vrNode.GetReferenceCount()))
vs = slicer.mrmlScene.GetNodesByClass('vtkMRMLScalarVolumeNode')
v = vs.GetItemAsObject(0)

rs = slicer.mrmlScene.GetNodesByClass('vtkMRMLAnnotationROINode')
r = rs.GetItemAsObject(0)

vrLogic = slicer.modules.volumerendering.logic()
propNode = vrNode.GetVolumePropertyNode()

if propNode == None:
propNode = slicer.vtkMRMLVolumePropertyNode()
slicer.mrmlScene.AddNode(propNode)

vrNode.SetAndObserveVolumePropertyNodeID(propNode.GetID())
vrNode.SetAndObserveROINodeID(r.GetID())
vrNode.SetAndObserveVolumeNodeID(v.GetID())
v.AddAndObserveDisplayNodeID(vrNode.GetID())
vrLogic.CopyDisplayToVolumeRenderingDisplayNode(vrNode)
vrNode.VisibilityOn()

I have the following memory leaks, as you see display node is not deallocated:

Class "vtkCellData" has 9 instances still around.
Class "vtkCollection" has 2 instances still around.
Class "vtkInformationIntegerVectorValue" has 9 instances still around.
Class "vtkInformationVector" has 80 instances still around.
Class "vtkPerspectiveTransform" has 2 instances still around.
Class "vtkMRMLScalarVolumeNode" has 1 instance still around.
Class "vtkImageBimodalAnalysis" has 2 instances still around.
Class "vtkPointData" has 9 instances still around.
Class "vtkObservation" has 48 instances still around.
Class "vtkTrivialProducer" has 2 instances still around.
Class "vtkMatrix4x4" has 28 instances still around.
Class "vtkPassThrough" has 3 instances still around.
Class "vtkImageMapToColors" has 1 instance still around.
Class "vtkSimpleTransform" has 4 instances still around.
Class "vtkColorTransferFunction" has 1 instance still around.
Class "vtkObserverManager" has 14 instances still around.
Class "vtkIntArray" has 3 instances still around.
Class "vtkPoints" has 4 instances still around.
Class "vtkInformation" has 99 instances still around.
Class "vtkInformationStringVectorValue" has 2 instances still around.
Class "vtkLine" has 2 instances still around.
Class "vtkMultiThreader" has 10 instances still around.
Class "vtkInformationIntegerPointerValue" has 5 instances still around.
Class "vtkEventBroker" has 1 instance still around.
Class "vtkPolyData" has 4 instances still around.
Class "vtkLookupTable" has 1 instance still around.

---> Class "vtkMRMLCPURayCastVolumeRenderingDisplayNode" has 1 instance still around.

Class "vtkMRMLSliceNode" has 3 instances still around.
Class "vtkPiecewiseFunction" has 2 instances still around.
Class "vtkImageThreshold" has 1 instance still around.
Class "vtkMRMLAnnotationTextDisplayNode" has 1 instance still around.
Class "vtkOpenGLCamera" has 1 instance still around.
Class "vtkImageAccumulateDiscrete" has 2 instances still around.
Class "vtkIdList" has 3 instances still around.
Class "vtkDoubleArray" has 3 instances still around.
Class "vtkAlgorithmOutput" has 12 instances still around.
Class "vtkImageCast" has 1 instance still around.
Class "vtkMRMLColorTableNode" has 1 instance still around.
Class "vtkMRMLAnnotationROINode" has 1 instance still around.
Class "vtkInformationIntegerValue" has 115 instances still around.
Class "vtkExtentTranslator" has 1 instance still around.
Class "vtkTagTable" has 4 instances still around.
Class "vtkCellArray" has 2 instances still around.
Class "vtkImageData" has 5 instances still around.
Class "vtkMRMLAnnotationLineDisplayNode" has 1 instance still around.
Class "vtkFloatArray" has 2 instances still around.
Class "vtkMRMLScalarVolumeDisplayNode" has 1 instance still around.
Class "vtkInformationStringValue" has 7 instances still around.
Class "vtkVolumeProperty" has 1 instance still around.
Class "vtkStringArray" has 3 instances still around.
Class "vtkImageMapToWindowLevelColors" has 1 instance still around.
Class "vtkInformationExecutivePortVectorValue" has 11 instances still around.
Class "vtkTransform" has 3 instances still around.
Class "vtkIdTypeArray" has 2 instances still around.
Class "vtkShortArray" has 1 instance still around.
Class "vtkVoxel" has 1 instance still around.
Class "vtkFieldData" has 11 instances still around.
Class "vtkMRMLAnnotationPointDisplayNode" has 1 instance still around.
Class "vtkAssignAttribute" has 3 instances still around.
Class "vtkInformationDoubleVectorValue" has 7 instances still around.
Class "vtkMRMLCameraNode" has 1 instance still around.
Class "vtkMRMLVolumeArchetypeStorageNode" has 1 instance still around.
Class "vtkUnsignedCharArray" has 1 instance still around.
Class "vtkStreamingDemandDrivenPipeline" has 18 instances still around.
Class "vtkMRMLVolumePropertyNode" has 1 instance still around.
Class "vtkBitArray" has 4 instances still around.
Class "vtkImageAppendComponents" has 1 instance still around.
Class "vtkTimerLog" has 1 instance still around.
Class "vtkUnsignedLongArray" has 13 instances still around.
Class "vtkCommand or subclass" has 78 instances still around.
Class "vtkInformationExecutivePortValue" has 14 instances still around.
Class "vtkImageLogic" has 1 instance still around.

The memory leak is a duplicate of 0002621
This is most likely because slicer.mrmlScene.GetNodesByClass is leaking (see 0002626)
Try de-referencing them.

No crash running RSNA quantitative test as of r21143

From the hangout:

Julien Finet
4:18 PM
Found in ChangeTrackerDefineROIStep.py:
roi = slicer.mrmlScene.CreateNodeByClass('vtkMRMLAnnotationROINode')
slicer.mrmlScene.AddNode(roi)
parameterNode.SetParameter('roiNodeID', roi.GetID())
this is not the correct way to add ROI nodes (and it should leak)

Julien Finet
4:21 PM
Same problem in ChangeTrackerSelectScansStep.py when creating vtkMRMLLinearTransformNode

Andrey - Can you try the changes that Julien suggested?

Julien says you need to initialize the ROI node...

The following should help:

roi = slicer.vtkMRMLAnnotationROINode()
roi.Initialize(scene)

(note that the ChangeTracker documentation is not up to date, it links to 4.0)

Which version are you looking at? CreateNodeByClass has been fixed a while ago, and Initialize() was added yesterday. References for GetNodesByClass are also decremented.

Current version of ChangeTrackerPy: https://github.com/fedorov/ChangeTrackerPy/commit/b4fa890c98e162ee51394a52f6577fc1a4eed7a5

Version in External_ChangeTracker: b4fa890c98e162ee51394a52f6577fc1a4eed7a5

http://viewvc.slicer.org/viewvc.cgi/Slicer4/trunk/SuperBuild/External_ChangeTrackerPy.cmake?r1=21271&amp;r2=21274

which version of the code are you looking at?

I was looking at 68b70e15ada3b46742ab3374a62e3eb02a5d101a, my bad.
Nonetheless, in b4fa890c98e162ee51394a52f6577fc1a4eed7a5, there are still some issues:
roi.Initialize(slicer.mrmlScene)
slicer.mrmlScene.AddNode(roi)

vtkMRMLAnnotationNode::Initialize adds the node into the scene, so you shouldn't have to add it again after.
This is the reason of the crash (scene model doesn't handle well when nodes are added twice into the scene).
Here was an example where I find asserts useful sometimes, vtkMRMLScene::AddNode was firing errors, however it was lost in the logs and nobody cared, an assert would have been more efficient :-)

fixed in r21291.

Would be great if there was a uniform way to add nodes to the scene.

FYI, I did not have any crashes (neither on my build, nor on nightly linux).

And why can't AddNode() be a no-op if the node is already in the scene.

• Uniform way to add nodes is tracked by 0002606, item j)
• Crash didn't happen when running test RSNA2012Quant ? But at least errors where reported on the dashboard http://slicer.cdash.org/testDetails.php?test=3082872&amp;build=45528
• Make "AddNode() a no-op if the node is already in the scene" would be costly and it would fix unlegitimate use case, a search in the entire scene would have to happen at each insertion. Or said differently, if nowhere node is added twice, a check on the scene would still happen at each insertion for no reason.

Re crash: my bad, I didn't check the dashboard! The test was not crashing on my machine.

About AddNode(): vtkMRMLNode keeps pointer to the scene, so can't we just check the pointers in AddNode to figure out if the node is in the scene in question or not?

• AddNode(): Currently vtkMRMLNode::SetScene() can be called by anyone, and in a lot of places it is called before adding the node into the scene. My dream is to make it protected and solely vtkMRMLScene can set it, then at that time, yes, it should be possible to check if the node has a valid scene.

Makes sense. Added issue 0002713 to keep track of this last point.

Has this been resolved ? I would like to confidently resolve issue 0002517 and start the release process.

No, not resolved. This still happens on my latest build:

http://slicer.cdash.org/testDetails.php?test=3084373&amp;build=45566

But since this is an assert, it only happens on debug builds and may not be an issue for the tutorials. I am testing a windows release build to see if it crashes at exit.

I tested the windows release build and had no problems. Since this is the version that will be used for the training, I don't think this issue should be considered a roadblock (I would still like to see it resolved though).

Thanks for checking. Targeting for 4.2.1 and marking "Classroom Course 2" has resolved.

Andriy> Are you working on resolving the root cause of the assert ?

JC> No, I didn't realize this was the expectation. Is the root cause of the assert in ChangeTracker module? I thought it is something in Annotations related to ROI initialization. I thought I did all the fixes that Julien suggested, so the ROI node should be initialized correctly.

Also, the test is passing on the nightly dashboard, since I think Steve mentioned it is reproducible only in Debug mode. Are we going to set up Debug dashboards to track this issue?

The issue related to the tutorial has been closed. We are not addressing the "real" cause of the problem causing the issue which is also depicted by the title of the present issue "assert crash". Considering the fact the issue was assigned to you, I naturally asked for an update :)

Based on your feedback, re-assigning the issue seems to be the next things to do. That said, would you have time to investigate and try to fix the problem ?

There are currently no Debug dashboard, this is something we could do when the "factory-south" will be up and running.

JC, I can try, but would really rather spend my Slicer development time on Reporting module. And I really don't have time (as everyone else, of course). I was also wondering if it is wise for me to debug this, rather than some of the developers familiar with Annotations module.

I guess to start I will need to compile Slicer in Debug mode and check if I can reproduce the issue on my mac.

Also, looking at the issue history, it was originally assigned to Julien, then in note 0006933 reassigned to me based on Julien's feedback that I was not doing things correctly. I fixed the items Julien asked me to fix, but the issue never got reassigned to Julien.

After building locally the ChangeTrackerPy module and adding the following paths to the list of "additional module paths" (Menu -> Edit -> App Settings -> Module ..):

/path/to/ChangeTrackerPy-build/lib/Slicer-4.2/cli-modules
/path/to/ChangeTrackerPy-build/lib/Slicer-4.2/qt-scripted-modules

Try to run the part3 of the "RSNA2012Quant" self test returned the following error:

unpacking to /tmp/__BundleLoadTemp2013-09-03_15+09+30.792
loaded /tmp/__BundleLoadTemp2013-09-03_15+09+30.792
"MRB Slicer Data Bundle" Reader has successfully read the file "/tmp/Slicer/RSNA2011_ChangeTracker_data.zip"
Finished with download and loading

Configure Module
Show module (name): "ChangeTracker"
Traceback (most recent call last):
File "/home/jchris/Projects/ChangeTrackerPy-build/lib/Slicer-4.2/qt-scripted-modules/ChangeTracker.py", line 55, in setup
workflowWidget.buttonBoxWidget().nextButtonDefaultText = ""
AttributeError: 'nextButtonDefaultText' does not exist on ctkWorkflowButtonBoxWidget and creating new attributes on C++ objects is not allowed
ChangeTracker: enter() called
Traceback (most recent call last):
File "/home/jchris/Projects/Slicer-AHM-Superbuild-Release/Slicer-build/lib/Slicer-4.2/qt-scripted-modules/RSNA2012Quant.py", line 526, in test_Part3ChangeTracker
changeTracker.selectScansStep._ChangeTrackerSelectScansStep__baselineVolumeSelector.setCurrentNode(baselineNode)
AttributeError: ChangeTrackerWidget instance has no attribute 'selectScansStep'
Test caused exception!
ChangeTrackerWidget instance has no attribute 'selectScansStep'

@jcfr: I was not aware of this, sorry. Looks like CTK API changed. I will look into this.

@andriy: You not being aware aware of the problem can be explained by the fact the self test "RSNA2012Quant" (when run every night) checks locally for the availability of the ChangeTracker. Since the associated modules are not loaded, the self tests skips it.

Thanks for looking into this

@jcfr: well, even if the self-test was failing, I am not checking the dashboard regularly and would not notice...

Patched version: https://github.com/Slicer/ExtensionsIndex/pull/418

Note the self test does not crash, at least not on my Mac.

Unable to reproduce running RSNA2012Quant test using Slicer r22597 built in Debug/64-bit on Ubuntu 13.04

Closing resolved issues that have not been updated in more than 3 months