Crashes while trying to change SpinBox Style

1  ProjectExplorer::Internal::RunControlPrivate::supportsReRunning   runcontrol.cpp                 1089 0x7ffad9cf77a3 
2  ProjectExplorer::Internal::AppOutputPane::enableButtons           appoutputpane.cpp              710  0x7ffad98ab540 
3  ProjectExplorer::Internal::AppOutputPane::slotRunControlFinished2 appoutputpane.cpp              801  0x7ffad98af913 
4  QMetaCallEvent::placeMetaCall                                     qobject.cpp                    631  0x7ffadad094ab 
5  QObject::event                                                    qobject.cpp                    1356 0x7ffadad0798e 
6  QApplicationPrivate::notify_helper                                qapplication.cpp               3352 0x7ffadb8e13de 
7  QApplication::notify                                              qapplication.cpp               3304 0x7ffadb8e037f 
8  QCoreApplication::notifyInternal2                                 qcoreapplication.cpp           1067 0x7ffadacc44e5 
9  QCoreApplicationPrivate::sendPostedEvents                         qcoreapplication.cpp           1845 0x7ffadacc6d1e 
10 QWindowsGuiEventDispatcher::sendPostedEvents                      qwindowsguieventdispatcher.cpp 80   0x7ffadb4e18ef 
11 QEventDispatcherWin32::processEvents                              qeventdispatcher_win.cpp       476  0x7ffadae1f6e0 
12 QWindowsGuiEventDispatcher::processEvents                         qwindowsguieventdispatcher.cpp 73   0x7ffadb4e18c9 
13 QEventLoop::exec                                                  qeventloop.cpp                 218  0x7ffadacc9bbf 
14 QDialog::exec                                                     qdialog.cpp                    622  0x7ffadbae87f0 
15 ProjectExplorer::queue                                            buildmanager.cpp               168  0x7ffad98e30af 
16 ProjectExplorer::BuildManager::potentiallyBuildForRunConfig       buildmanager.cpp               391  0x7ffad98e29e4 
17 ProjectExplorer::ProjectExplorerPlugin::runRunConfiguration       projectexplorer.cpp            3228 0x7ffad9c2c6d4 
18 ProjectExplorer::ProjectExplorerPlugin::runProject                projectexplorer.cpp            3210 0x7ffad9c2c46c 
19 QmlDesigner::handleAction                                         qmlpreviewactions.cpp          81   0x7ffb21baf40a