Crash when importing self-built Creator from existing build

Thread 1 "qtcreator" received signal SIGSEGV, Segmentation fault.
0x00007ffff5b518f5 in QObjectPrivate::addConnection(int, QObjectPrivate::Connection*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Core.so.5
(gdb) bt
#0  0x00007ffff5b518f5 in QObjectPrivate::addConnection(int, QObjectPrivate::Connection*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Core.so.5
#1  0x00007ffff5b51eba in QObjectPrivate::connectImpl(QObject const*, int, QObject const*, void**, QtPrivate::QSlotObjectBase*, Qt::ConnectionType, int const*, QMetaObject const*) ()
   from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Core.so.5
#2  0x00007ffff5b522a5 in QObject::connectImpl(QObject const*, void**, QObject const*, void**, QtPrivate::QSlotObjectBase*, Qt::ConnectionType, int const*, QMetaObject const*) ()
   from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Core.so.5
#3  0x00007fffcdad8696 in std::_Function_handler<QMetaObject::Connection (ProjectExplorer::ProjectConfiguration*), void ProjectExplorer::Target::subscribeSignal<ProjectExplorer::BuildConfiguration, ProjectExplorer::LocalEnvironmentAspect, void>(void (ProjectExplorer::BuildConfiguration::*)(), ProjectExplorer::LocalEnvironmentAspect*, void (ProjectExplorer::LocalEnvironmentAspect::*)())::{lambda(ProjectExplorer::ProjectConfiguration*)#1}>::_M_invoke(std::_Any_data const&, ProjectExplorer::ProjectConfiguration*&&) () from /home/mitch/dev/qt-unified/Tools/QtCreator/lib/qtcreator/plugins/libProjectExplorer.so
#4  0x00007fffcdae5eee in ProjectExplorer::Internal::Subscription::subscribe(ProjectExplorer::ProjectConfiguration*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/lib/qtcreator/plugins/libProjectExplorer.so
#5  0x00007ffff5b4eef6 in QMetaObject::activate(QObject*, int, int, void**) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Core.so.5
#6  0x00007fffcdc70552 in ProjectExplorer::Target::addedProjectConfiguration(ProjectExplorer::ProjectConfiguration*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/lib/qtcreator/plugins/libProjectExplorer.so
#7  0x00007fffcdb2d613 in ProjectExplorer::Target::addBuildConfiguration(ProjectExplorer::BuildConfiguration*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/lib/qtcreator/plugins/libProjectExplorer.so
#8  0x00007fffcdae4da3 in ?? () from /home/mitch/dev/qt-unified/Tools/QtCreator/lib/qtcreator/plugins/libProjectExplorer.so
#9  0x00007ffff5b4eef6 in QMetaObject::activate(QObject*, int, int, void**) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Core.so.5
#10 0x00007ffff6ef3175 in QWidget::customContextMenuRequested(QPoint const&) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Widgets.so.5
#11 0x00007ffff6f0cccd in QWidget::event(QEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Widgets.so.5
#12 0x00007ffff6fae3ae in QFrame::event(QEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Widgets.so.5
#13 0x00007ffff710ae1c in QAbstractItemView::viewportEvent(QEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Widgets.so.5
#14 0x00007ffff716f6fc in QTreeView::viewportEvent(QEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Widgets.so.5
#15 0x00007ffff5b23792 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Core.so.5
#16 0x00007ffff6ecf525 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Widgets.so.5
#17 0x00007ffff6ed8092 in QApplication::notify(QObject*, QEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Widgets.so.5
#18 0x00007ffff5b239f8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Core.so.5
#19 0x00007ffff6f2583f in ?? () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Widgets.so.5
#20 0x00007ffff6f28003 in ?? () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Widgets.so.5
#21 0x00007ffff6ecf54c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Widgets.so.5
#22 0x00007ffff6ed6897 in QApplication::notify(QObject*, QEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Widgets.so.5
#23 0x00007ffff5b239f8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Core.so.5
#24 0x00007ffff66c1530 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Gui.so.5
#25 0x00007ffff66c3315 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Gui.so.5
#26 0x00007ffff669f15b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Gui.so.5
#27 0x00007fffee24c9ab in ?? () from /home/mitch/dev/qt-unified/Tools/QtCreator/lib/Qt/plugins/platforms/../../lib/libQt5XcbQpa.so.5
#28 0x00007ffff5b2226a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Core.so.5
#29 0x00007ffff5b2ada4 in QCoreApplication::exec() () from /home/mitch/dev/qt-unified/Tools/QtCreator/bin/../lib/Qt/lib/libQt5Core.so.5
#30 0x000000000040a4ca in ?? ()
#31 0x00007ffff47ca830 in __libc_start_main (main=0x407080, argc=1, argv=0x7fffffffdc58, init=<optimised out>, fini=<optimised out>, rtld_fini=<optimised out>, stack_end=0x7fffffffdc48) at ../csu/libc-start.c:291
#32 0x000000000040a731 in ?? ()
(gdb)