Crash at shutdown

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fff911c3286 __pthread_kill + 10
1   libsystem_c.dylib             	0x00007fff945b1b53 abort + 129
2   libsystem_malloc.dylib        	0x00007fff945e5937 free + 428
3   libQmakeProjectManager_debug.dylib	0x000000011043efa2 QmakeProjectManager::Internal::QmakeProjectImporter::~QmakeProjectImporter() + 34 (qmakeprojectimporter.h:47)
4   libProjectExplorer_debug.dylib	0x000000010c6171a3 ProjectExplorer::Internal::TargetSettingsPanelWidget::~TargetSettingsPanelWidget() + 83 (targetsettingspanel.cpp:122)
5   libProjectExplorer_debug.dylib	0x000000010c6171e5 ProjectExplorer::Internal::TargetSettingsPanelWidget::~TargetSettingsPanelWidget() + 21 (targetsettingspanel.cpp:122)
6   libProjectExplorer_debug.dylib	0x000000010c617239 ProjectExplorer::Internal::TargetSettingsPanelWidget::~TargetSettingsPanelWidget() + 25 (targetsettingspanel.cpp:120)
7   libProjectExplorer_debug.dylib	0x000000010c5918f2 void qDeleteAll<QWidget* const*>(QWidget* const*, QWidget* const*) + 66 (qalgorithms.h:318)
8   libProjectExplorer_debug.dylib	0x000000010c58f8fe void qDeleteAll<QVector<QWidget*> >(QVector<QWidget*> const&) + 46 (qalgorithms.h:326)
9   libProjectExplorer_debug.dylib	0x000000010c58be57 ProjectExplorer::Internal::WidgetCache::deregisterProject(ProjectExplorer::Project*) + 167 (projectwindow.cpp:259)
10  libProjectExplorer_debug.dylib	0x000000010c58acc5 ProjectExplorer::Internal::WidgetCache::clear() + 69 (projectwindow.cpp:389)
11  libProjectExplorer_debug.dylib	0x000000010c58ac32 ProjectExplorer::Internal::ProjectWindow::aboutToShutdown() + 50 (projectwindow.cpp:102)
12  libProjectExplorer_debug.dylib	0x000000010c51d9a8 ProjectExplorer::ProjectExplorerPlugin::aboutToShutdown() + 120 (projectexplorer.cpp:1514)
13  libExtensionSystem_debug.1.0.0.dylib	0x0000000103e36a0f ExtensionSystem::Internal::PluginSpecPrivate::stop() + 79 (pluginspec.cpp:1041)
14  libExtensionSystem_debug.1.0.0.dylib	0x0000000103e1cf69 ExtensionSystem::Internal::PluginManagerPrivate::loadPlugin(ExtensionSystem::PluginSpec*, ExtensionSystem::PluginSpec::State) + 1497 (pluginmanager.cpp:1399)
15  libExtensionSystem_debug.1.0.0.dylib	0x0000000103e1c92e ExtensionSystem::Internal::PluginManagerPrivate::stopAll() + 350 (pluginmanager.cpp:918)
16  libExtensionSystem_debug.1.0.0.dylib	0x0000000103e1804c ExtensionSystem::Internal::PluginManagerPrivate::shutdown() + 28 (pluginmanager.cpp:1248)
17  libExtensionSystem_debug.1.0.0.dylib	0x0000000103e18028 ExtensionSystem::PluginManager::shutdown() + 24 (pluginmanager.cpp:441)
18  libExtensionSystem_debug.1.0.0.dylib	0x0000000103e4a244 ExtensionSystem::PluginManager::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) + 212 (moc_pluginmanager.cpp:100)
19  org.qt-project.QtCore         	0x00000001051fd769 QMetaObject::activate(QObject*, int, int, void**) + 2953
20  org.qt-project.QtCore         	0x00000001051cd5a6 QCoreApplication::exec() + 390
21  org.qt-project.qtcreator      	0x0000000103ddf32b main + 13291
22  org.qt-project.qtcreator      	0x0000000103dd8294 start + 52