Crash switchign sessions (recent git)

Recently I've been having a crash switching sessions, using git master.

I ran with a debugger and heres the stack trace.

Each session has a generic project open (incase that matters).

—
Stack trace from commit 1169693c5552caa32df01c41f13fccb915c0a839

Program received signal SIGSEGV, Segmentation fault.
0x00007fffe03a87a6 in Core::EditorManager::viewForEditor (editor=0x0) at editormanager/editormanager.cpp:557
(gdb) bt
#0 0x00007fffe03a87a6 in Core::EditorManager::viewForEditor (editor=0x0) at editormanager/editormanager.cpp:557
#1 0x00007fffe03ac2bf in Core::EditorManager::activateEditor (editor=0x0, flags=...) at editormanager/editormanager.cpp:1054
#2 0x00007fffe03b421d in Core::EditorManager::removeAllSplits (this=0x941330) at editormanager/editormanager.cpp:2218
#3 0x00007fffe03b25b5 in Core::EditorManager::restoreState (this=0x941330, state=...) at editormanager/editormanager.cpp:1982
#4 0x00007fffd8ead72b in ProjectExplorer::SessionManager::restoreEditors (this=0xa261e0, reader=...) at session.cpp:779
#5 0x00007fffd8eae310 in ProjectExplorer::SessionManager::loadSession (this=0xa261e0, session=...) at session.cpp:881
#6 0x00007fffd8e07ad5 in ProjectExplorer::ProjectExplorerPlugin::setSession (this=0x99ad90, action=0x23688c0) at projectexplorer.cpp:3002
#7 0x00007fffd8faee4a in ProjectExplorer::ProjectExplorerPlugin::qt_static_metacall (_o=0x99ad90, _c=QMetaObject::InvokeMetaMethod, _id=38, _a=0x7fffffffc480) at .moc/debug-shared/moc_projectexplorer.cpp:500
#8 0x00007ffff66b2126 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#9 0x00007ffff74b7c7f in QActionGroup::triggered(QAction*) () from /usr/lib/libQt5Widgets.so.5
#10 0x00007ffff74b87c9 in ?? () from /usr/lib/libQt5Widgets.so.5
#11 0x00007ffff66b2126 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#12 0x00007ffff74b4a32 in QAction::triggered(bool) () from /usr/lib/libQt5Widgets.so.5
#13 0x00007ffff74b6d48 in QAction::activate(QAction::ActionEvent) () from /usr/lib/libQt5Widgets.so.5
#14 0x00007ffff7621f5a in ?? () from /usr/lib/libQt5Widgets.so.5
#15 0x00007ffff7625f46 in ?? () from /usr/lib/libQt5Widgets.so.5
#16 0x00007ffff7629eda in QMenu::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQt5Widgets.so.5
#17 0x00007ffff74f4ef9 in QWidget::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5
#18 0x00007ffff762a51b in QMenu::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5
#19 0x00007ffff74bb8dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#20 0x00007ffff74c104d in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#21 0x00007ffff668e2fd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#22 0x00007ffff74bf261 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/libQt5Widgets.so.5
#23 0x00007ffff751054b in ?? () from /usr/lib/libQt5Widgets.so.5
#24 0x00007ffff7512003 in ?? () from /usr/lib/libQt5Widgets.so.5
#25 0x00007ffff74bb8dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#26 0x00007ffff74c05f2 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#27 0x00007ffff668e2fd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#28 0x00007ffff6b4a977 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib/libQt5Gui.so.5
#29 0x00007ffff6b4c17d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/libQt5Gui.so.5
#30 0x00007ffff6b38fd8 in QWindowSystemInterface::sendWindowSystemEventsImplementation(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Gui.so.5
#31 0x00007fffee329240 in ?? () from /usr/lib/qt/plugins/platforms/libqxcb.so
#32 0x00007ffff52b2f06 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#33 0x00007ffff52b3258 in ?? () from /usr/lib/libglib-2.0.so.0
#34 0x00007ffff52b32fc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#35 0x00007ffff66d2a0c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#36 0x00007ffff668d1ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#37 0x00007ffff66922b1 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#38 0x000000000040df27 in main (argc=1, argv=0x7fffffffdfe8) at main.cpp:517