Hangs at application start while filtering output

Call graph:
    2365 Thread_4950052   DispatchQueue_1: com.apple.main-thread  (serial)
    + 2365 start  (in libdyld.dylib) + 1  [0x7fff5b72a3d5]
    +   2365 main  (in Qt Creator) + 13807  [0x10bb0e6af]  main.cpp:631
    +     2365 QCoreApplication::exec()  (in QtCore) + 130  [0x10d20b452]
    +       2365 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)  (in QtCore) + 431  [0x10d20650f]
    +         2365 QCocoaEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)  (in libqcocoa.dylib) + 2955  [0x10f811ccb]
    +           2365 -[NSApplication run]  (in AppKit) + 699  [0x7fff2c930eb0]
    +             2365 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:]  (in AppKit) + 1361  [0x7fff2c936d93]
    +               2365 _DPSNextEvent  (in AppKit) + 965  [0x7fff2c937ffb]
    +                 2365 _BlockUntilNextEventMatchingListInModeWithFilter  (in HIToolbox) + 64  [0x7fff2e59d4a6]
    +                   2365 ReceiveNextEventCommon  (in HIToolbox) + 603  [0x7fff2e59d715]
    +                     2365 RunCurrentEventLoopInMode  (in HIToolbox) + 292  [0x7fff2e59d9db]
    +                       2365 CFRunLoopRunSpecific  (in CoreFoundation) + 455  [0x7fff2f2b0e0e]
    +                         2365 __CFRunLoopRun  (in CoreFoundation) + 1189  [0x7fff2f2b1505]
    +                           2365 __CFRunLoopDoSources0  (in CoreFoundation) + 283  [0x7fff2f2b1f93]
    +                             2365 __CFRunLoopDoSource0  (in CoreFoundation) + 108  [0x7fff2f2ce589]
    +                               2365 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__  (in CoreFoundation) + 17  [0x7fff2f2ce5e3]
    +                                 2365 QCocoaEventDispatcherPrivate::activateTimersSourceCallback(void*)  (in libqcocoa.dylib) + 18  [0x10f810da2]
    +                                   2365 QTimerInfoList::activateTimers()  (in QtCore) + 991  [0x10d26434f]
    +                                     2365 QCoreApplication::notifyInternal2(QObject*, QEvent*)  (in QtCore) + 212  [0x10d20ae44]
    +                                       2365 QApplication::notify(QObject*, QEvent*)  (in QtWidgets) + 594  [0x10c3e5b02]
    +                                         2365 QApplicationPrivate::notify_helper(QObject*, QEvent*)  (in QtWidgets) + 269  [0x10c3e46fd]
    +                                           2365 QObject::event(QEvent*)  (in QtCore) + 102  [0x10d2344c6]
    +                                             2365 QSingleShotTimer::timerEvent(QTimerEvent*)  (in QtCore) + 173  [0x10d24409d]
    +                                               2365 QtPrivate::QSlotObject<void (ProjectExplorer::RunWorker::*)(), QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*)  (in libProjectExplorer_debug.dylib) + 166  [0x113fc7756]  qobjectdefs_impl.h:414
    +                                                 2365 void QtPrivate::FunctionPointer<void (ProjectExplorer::RunWorker::*)()>::call<QtPrivate::List<>, void>(void (ProjectExplorer::RunWorker::*)(), ProjectExplorer::RunWorker*, void**)  (in libProjectExplorer_debug.dylib) + 99  [0x113fc7843]  qobjectdefs_impl.h:185
    +                                                   2365 QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, void (ProjectExplorer::RunWorker::*)()>::call(void (ProjectExplorer::RunWorker::*)(), ProjectExplorer::RunWorker*, void**)  (in libProjectExplorer_debug.dylib) + 126  [0x113fc78ee]  qobjectdefs_impl.h:152
    +                                                     2365 ProjectExplorer::RunWorker::initiateStart()  (in libProjectExplorer_debug.dylib) + 177  [0x113fb9be1]  runcontrol.cpp:1339
    +                                                       2365 ProjectExplorer::SimpleTargetRunner::start()  (in libProjectExplorer_debug.dylib) + 474  [0x113fbddba]  runcontrol.cpp:1109
    +                                                         2365 ProjectExplorer::RunWorker::appendMessage(QString const&, Utils::OutputFormat, bool)  (in libProjectExplorer_debug.dylib) + 252  [0x113fbe79c]  runcontrol.cpp:1434
    +                                                           2365 ProjectExplorer::RunControl::appendMessage(QString const&, Utils::OutputFormat)  (in libProjectExplorer_debug.dylib) + 84  [0x1141f60e4]  moc_runcontrol.cpp:318
    +                                                             2365 QMetaObject::activate(QObject*, int, int, void**)  (in QtCore) + 2219  [0x10d23bd0b]
    +                                                               2365 QtPrivate::QFunctorSlotObject<ProjectExplorer::Internal::AppOutputPane::createNewOutputWindow(ProjectExplorer::RunControl*)::$_4, 2, QtPrivate::List<QString const&, Utils::OutputFormat>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*)  (in libProjectExplorer_debug.dylib) + 157  [0x1140c227d]  qobjectdefs_impl.h:439
    +                                                                 2365 void QtPrivate::Functor<ProjectExplorer::Internal::AppOutputPane::createNewOutputWindow(ProjectExplorer::RunControl*)::$_4, 2>::call<QtPrivate::List<QString const&, Utils::OutputFormat>, void>(ProjectExplorer::Internal::AppOutputPane::createNewOutputWindow(ProjectExplorer::RunControl*)::$_4&, void*, void**)  (in libProjectExplorer_debug.dylib) + 33  [0x1140c22d1]  qobjectdefs_impl.h:256
    +                                                                   2365 QtPrivate::FunctorCall<QtPrivate::IndexesList<0, 1>, QtPrivate::List<QString const&, Utils::OutputFormat>, void, ProjectExplorer::Internal::AppOutputPane::createNewOutputWindow(ProjectExplorer::RunControl*)::$_4>::call(ProjectExplorer::Internal::AppOutputPane::createNewOutputWindow(ProjectExplorer::RunControl*)::$_4&, void**)  (in libProjectExplorer_debug.dylib) + 43  [0x1140c232b]  qobjectdefs_impl.h:146
    +                                                                     2365 ProjectExplorer::Internal::AppOutputPane::createNewOutputWindow(ProjectExplorer::RunControl*)::$_4::operator()(QString const&, Utils::OutputFormat) const  (in libProjectExplorer_debug.dylib) + 42  [0x1140c237a]  appoutputpane.cpp:461
    +                                                                       2365 ProjectExplorer::Internal::AppOutputPane::appendMessage(ProjectExplorer::RunControl*, QString const&, Utils::OutputFormat)  (in libProjectExplorer_debug.dylib) + 330  [0x1140bcfaa]  appoutputpane.cpp:567
    +                                                                         2365 Core::OutputWindow::appendMessage(QString const&, Utils::OutputFormat)  (in libCore_debug.dylib) + 981  [0x1121f8d45]  outputwindow.cpp:439
    +                                                                           2365 QtSupport::QtOutputFormatter::appendMessage(QString const&, Utils::OutputFormat)  (in libQtSupport_debug.dylib) + 93  [0x11644321d]  qtoutputformatter.cpp:135
    +                                                                             2365 QtSupport::QtOutputFormatter::appendMessage(QString const&, QTextCharFormat const&)  (in libQtSupport_debug.dylib) + 342  [0x116443d36]  qtoutputformatter.cpp:191
    +                                                                               2365 Utils::OutputFormatter::contentChanged()  (in libUtils_debug.4.9.82.dylib) + 34  [0x10be7de02]  moc_outputformatter.cpp:131
    +                                                                                 2365 QMetaObject::activate(QObject*, int, int, void**)  (in QtCore) + 2219  [0x10d23bd0b]
    +                                                                                   2365 QtPrivate::QSlotObject<void (Core::OutputWindow::*)(), QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*)  (in libCore_debug.dylib) + 166  [0x1121fae36]  qobjectdefs_impl.h:414
    +                                                                                     2365 void QtPrivate::FunctionPointer<void (Core::OutputWindow::*)()>::call<QtPrivate::List<>, void>(void (Core::OutputWindow::*)(), Core::OutputWindow*, void**)  (in libCore_debug.dylib) + 99  [0x1121faf23]  qobjectdefs_impl.h:185
    +                                                                                       2365 QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, void (Core::OutputWindow::*)()>::call(void (Core::OutputWindow::*)(), Core::OutputWindow*, void**)  (in libCore_debug.dylib) + 126  [0x1121fafce]  qobjectdefs_impl.h:152
    +                                                                                         689 Core::OutputWindow::filterNewContent()  (in libCore_debug.dylib) + 1786  [0x1121f7b7a]  outputwindow.cpp:351
    +                                                                                         ! 689 QTextBlock::next() const  (in QtGui) + 112,92,...  [0x10caa0650,0x10caa063c,...]
    +                                                                                         380 Core::OutputWindow::filterNewContent()  (in libCore_debug.dylib) + 1650,1675,...  [0x1121f7af2,0x1121f7b0b,...]  outputwindow.cpp:352
    +                                                                                         283 Core::OutputWindow::filterNewContent()  (in libCore_debug.dylib) + 1396  [0x1121f79f4]  outputwindow.cpp:351
    +                                                                                         ! 273 QTextBlock::operator!=(QTextBlock const&) const  (in libCore_debug.dylib) + 71,45,...  [0x1121f8607,0x1121f85ed,...]  qtextobject.h:213
    +                                                                                         ! 10 QTextBlock::operator!=(QTextBlock const&) const  (in libCore_debug.dylib) + 63  [0x1121f85ff]  qtextobject.h:0
    +                                                                                         235 Core::OutputWindow::filterNewContent()  (in libCore_debug.dylib) + 1802  [0x1121f7b8a]  outputwindow.cpp:351
    +                                                                                         ! 235 QTextBlock::operator=(QTextBlock const&)  (in libCore_debug.dylib) + 30,26,...  [0x1121f832e,0x1121f832a,...]  qtextobject.h:208
    +                                                                                         211 Core::OutputWindow::filterNewContent()  (in libCore_debug.dylib) + 1391,1770,...  [0x1121f79ef,0x1121f7b6a,...]  outputwindow.cpp:351
    +                                                                                         175 Core::OutputWindow::filterNewContent()  (in libCore_debug.dylib) + 1670  [0x1121f7b06]  outputwindow.cpp:352
    +                                                                                         ! 175 QTextBlock::setVisible(bool)  (in QtGui) + 56,27,...  [0x10caa0218,0x10caa01fb,...]
    +                                                                                         154 Core::OutputWindow::filterNewContent()  (in libCore_debug.dylib) + 1446  [0x1121f7a26]  outputwindow.cpp:352
    +                                                                                         ! 154 QString::isEmpty() const  (in libCore_debug.dylib) + 22,8,...  [0x1121a16d6,0x1121a16c8,...]  qstring.h:942
    +                                                                                         116 Core::OutputWindow::filterNewContent()  (in libCore_debug.dylib) + 1377  [0x1121f79e1]  outputwindow.cpp:351
    +                                                                                         ! 116 QTextDocument::end() const  (in QtGui) + 0,4,...  [0x10caa60a0,0x10caa60a4,...]
    +                                                                                         67 Core::OutputWindow::filterNewContent()  (in libCore_debug.dylib) + 1477,1469,...  [0x1121f7a45,0x1121f7a3d,...]  outputwindow.cpp:353
    +                                                                                         34 DYLD-STUB$$QTextBlock::next() const  (in libCore_debug.dylib) + 0  [0x1124cb024]
    +                                                                                         20 DYLD-STUB$$QTextBlock::setVisible(bool)  (in libCore_debug.dylib) + 0  [0x1124c9116]
    +                                                                                         1 DYLD-STUB$$QTextDocument::end() const  (in libCore_debug.dylib) + 0  [0x1124cb294]