Segfault when creating QQmlApplicationEngine

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [1680]

VM Regions Near 0:
--> 
    __TEXT                 000000010845c000-00000001084ce000 [  456K] r-x/rwx SM=COW  /Users/USER/*/slate.app/Contents/MacOS/slate

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   org.qt-project.QtQml          	0x000000010954d279 QV4::ExecutionEngine::ExecutionEngine(QJSEngine*)::$_61::operator()() const + 73
1   org.qt-project.QtQml          	0x0000000109549ed3 QV4::ExecutionEngine::ExecutionEngine(QJSEngine*) + 9411
2   org.qt-project.QtQml          	0x00000001094414e7 QJSEngine::QJSEngine(QJSEnginePrivate&, QObject*) + 55
3   org.qt-project.QtQml          	0x000000010958b76e QQmlEngine::QQmlEngine(QQmlEnginePrivate&, QObject*) + 14
4   org.qt-project.QtQml          	0x000000010961e870 QQmlApplicationEngine::QQmlApplicationEngine(QObject*) + 96
5   org.example.slate             	0x000000010845cf1d Application::Application(int&, char**, QString const&) + 253 (application.cpp:78)
6   org.example.slate             	0x000000010846852d Application::Application(int&, char**, QString const&) + 45 (application.cpp:147)
7   org.example.slate             	0x000000010847b4b9 main + 89 (main.cpp:5)
8   org.example.slate             	0x000000010845cd74 start + 52

Thread 1:
0   libsystem_pthread.dylib       	0x00007fff66e32408 start_wqthread + 0
1   ???                           	0x0000000054485244 0 + 1414025796

Thread 2:
0   libsystem_pthread.dylib       	0x00007fff66e32408 start_wqthread + 0
1   ???                           	0x0000000054485244 0 + 1414025796

Thread 3:
0   libsystem_pthread.dylib       	0x00007fff66e32408 start_wqthread + 0
1   ???                           	0x0000000054485244 0 + 1414025796

Thread 4:
0   libsystem_pthread.dylib       	0x00007fff66e32408 start_wqthread + 0
1   ???                           	0x0000000054485244 0 + 1414025796

Thread 5:
0   libsystem_pthread.dylib       	0x00007fff66e32408 start_wqthread + 0
1   ???                           	0x0000000054485244 0 + 1414025796

Thread 6:
0   libsystem_pthread.dylib       	0x00007fff66e32408 start_wqthread + 0

Thread 7:
0   libsystem_pthread.dylib       	0x00007fff66e32408 start_wqthread + 0
1   ???                           	0x0000000000001303 0 + 4867

Thread 8:: QQmlThread
0   libsystem_kernel.dylib        	0x00007fff66d81b8e poll + 10
1   org.qt-project.QtCore         	0x000000010879eb70 qt_safe_poll(pollfd*, unsigned int, timespec const*) + 608
2   org.qt-project.QtCore         	0x00000001087a0546 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 982
3   org.qt-project.QtCore         	0x000000010873aa8e QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 366
4   org.qt-project.QtCore         	0x000000010855544c QThread::exec() + 156
5   org.qt-project.QtQml          	0x0000000109648159 QQmlThreadPrivate::run() + 57
6   org.qt-project.QtCore         	0x0000000108556302 QThreadPrivate::start(void*) + 338
7   libsystem_pthread.dylib       	0x00007fff66e3333d _pthread_body + 126
8   libsystem_pthread.dylib       	0x00007fff66e362a7 _pthread_start + 70
9   libsystem_pthread.dylib       	0x00007fff66e32425 thread_start + 13