Crash when Search Symbol executed

Thread 1 (Thread 0x7f015a4ec380 (LWP 174058)):
#0  0x00007f0142d03f86 in Core::Internal::SearchResultTreeItem::rowOfItem (this=0x0) at /home/jarek/dev/creator-master/src/plugins/coreplugin/find/searchresulttreeitems.cpp:73
#1  0x00007f0142d0576c in Core::Internal::SearchResultTreeModel::parent (this=0x4a6db40, idx=...) at /home/jarek/dev/creator-master/src/plugins/coreplugin/find/searchresulttreemodel.cpp:184
#2  0x00007f015e2cd1cc in QModelIndex::parent (this=0x54c35e0) at /home/jarek/dev/qt-515/qtbase/src/corelib/itemmodels/qabstractitemmodel.h:443
#3  0x00007f015e2f7395 in QSortFilterProxyModelPrivate::_q_sourceDataChanged (this=0x2d7b4d0, source_top_left=..., source_bottom_right=..., roles=...) at /home/jarek/dev/qt-515/qtbase/src/corelib/itemmodels/qsortfilterproxymodel.cpp:1405
#4  0x00007f015e2fcdd0 in QSortFilterProxyModel::qt_static_metacall (_o=0x17e4270, _c=QMetaObject::InvokeMetaMethod, _id=15, _a=0x7ffff6c22f70) at .moc/moc_qsortfilterproxymodel.cpp:275
#5  0x00007f015e37e34b in doActivate<false> (sender=0x4a6db40, signal_index=3, argv=0x7ffff6c22f70) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qobject.cpp:3898
#6  0x00007f015e377ca9 in QMetaObject::activate (sender=0x4a6db40, m=0x7f015e71c220 <QAbstractItemModel::staticMetaObject>, local_signal_index=0, argv=0x7ffff6c22f70) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qobject.cpp:3946
#7  0x00007f015e2cc057 in QAbstractItemModel::dataChanged (this=0x4a6db40, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:557
#8  0x00007f0142d05e0a in Core::Internal::SearchResultTreeModel::updateCheckStateFromChildren (this=0x4a6db40, idx=..., item=0x2d52cb0) at /home/jarek/dev/creator-master/src/plugins/coreplugin/find/searchresulttreemodel.cpp:285
#9  0x00007f0142d06ce2 in Core::Internal::SearchResultTreeModel::addResultsToCurrentParent (this=0x4a6db40, items=..., mode=Core::SearchResult::AddSorted) at /home/jarek/dev/creator-master/src/plugins/coreplugin/find/searchresulttreemodel.cpp:426
#10 0x00007f0142d072e8 in Core::Internal::SearchResultTreeModel::addResults (this=0x4a6db40, items=..., mode=Core::SearchResult::AddSorted) at /home/jarek/dev/creator-master/src/plugins/coreplugin/find/searchresulttreemodel.cpp:469
#11 0x00007f0142d07f02 in Core::Internal::SearchResultFilterModel::addResults (this=0x17e4270, items=..., mode=Core::SearchResult::AddSorted) at /home/jarek/dev/creator-master/src/plugins/coreplugin/find/searchresulttreemodel.cpp:596
#12 0x00007f0142d10373 in Core::Internal::SearchResultTreeView::addResults (this=0x5534050, items=..., mode=Core::SearchResult::AddSorted) at /home/jarek/dev/creator-master/src/plugins/coreplugin/find/searchresulttreeview.cpp:97
#13 0x00007f0142d13182 in Core::Internal::SearchResultWidget::addResults (this=0x3cdcf30, items=..., mode=Core::SearchResult::AddSorted) at /home/jarek/dev/creator-master/src/plugins/coreplugin/find/searchresultwidget.cpp:254
#14 0x00007f0142d18747 in Core::SearchResult::addResults (this=0x1886e80, items=..., mode=Core::SearchResult::AddSorted) at /home/jarek/dev/creator-master/src/plugins/coreplugin/find/searchresultwindow.cpp:833
#15 0x00007f0141a569aa in CppTools::Internal::SymbolsFindFilter::addResults (this=0x1a23560, begin=90, end=91) at /home/jarek/dev/creator-master/src/plugins/cpptools/symbolsfindfilter.cpp:164
#16 0x00007f0141a5bc39 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0, 1>, QtPrivate::List<int, int>, void, void (CppTools::Internal::SymbolsFindFilter::*)(int, int)>::call (f=(void (CppTools::Internal::SymbolsFindFilter::*)(CppTools::Internal::SymbolsFindFilter * const, int, int)) 0x7f0141a56872 <CppTools::Internal::SymbolsFindFilter::addResults(int, int)>, o=0x1a23560, arg=0x7ffff6c237b0) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qobjectdefs_impl.h:152
#17 0x00007f0141a5b6bc in QtPrivate::FunctionPointer<void (CppTools::Internal::SymbolsFindFilter::*)(int, int)>::call<QtPrivate::List<int, int>, void> (f=(void (CppTools::Internal::SymbolsFindFilter::*)(CppTools::Internal::SymbolsFindFilter * const, int, int)) 0x7f0141a56872 <CppTools::Internal::SymbolsFindFilter::addResults(int, int)>, o=0x1a23560, arg=0x7ffff6c237b0) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qobjectdefs_impl.h:185
#18 0x00007f0141a5ac49 in QtPrivate::QSlotObject<void (CppTools::Internal::SymbolsFindFilter::*)(int, int), QtPrivate::List<int, int>, void>::impl (which=1, this_=0x17003d0, r=0x1a23560, a=0x7ffff6c237b0, ret=0x0) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qobjectdefs_impl.h:418
#19 0x00007f015e33ebc9 in QtPrivate::QSlotObjectBase::call (this=0x17003d0, r=0x1a23560, a=0x7ffff6c237b0) at ../../include/QtCore/../../../../qt-515/qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#20 0x00007f015e37e2b2 in doActivate<false> (sender=0x3027bd0, signal_index=9, argv=0x7ffff6c237b0) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qobject.cpp:3886
#21 0x00007f015e377ca9 in QMetaObject::activate (sender=0x3027bd0, m=0x7f015e719360 <QFutureWatcherBase::staticMetaObject>, local_signal_index=6, argv=0x7ffff6c237b0) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qobject.cpp:3946
#22 0x00007f015e0d0cf1 in QFutureWatcherBase::resultsReadyAt (this=0x3027bd0, _t1=90, _t2=91) at .moc/moc_qfuturewatcher.cpp:305
#23 0x00007f015e0d0350 in QFutureWatcherBasePrivate::sendCallOutEvent (this=0x2d7b9d0, event=0x7f002a586e20) at /home/jarek/dev/qt-515/qtbase/src/corelib/thread/qfuturewatcher.cpp:467
#24 0x00007f015e0cfbd4 in QFutureWatcherBase::event (this=0x3027bd0, event=0x7f002a586e20) at /home/jarek/dev/qt-515/qtbase/src/corelib/thread/qfuturewatcher.cpp:334
#25 0x00007f015f3bcba3 in QApplicationPrivate::notify_helper (this=0x118b600, receiver=0x3027bd0, e=0x7f002a586e20) at /home/jarek/dev/qt-515/qtbase/src/widgets/kernel/qapplication.cpp:3637
#26 0x00007f015f3b9f93 in QApplication::notify (this=0x7ffff6c24570, receiver=0x3027bd0, e=0x7f002a586e20) at /home/jarek/dev/qt-515/qtbase/src/widgets/kernel/qapplication.cpp:2977
#27 0x00007f015e32d66c in QCoreApplication::notifyInternal2 (receiver=0x3027bd0, event=0x7f002a586e20) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qcoreapplication.cpp:1064
#28 0x00007f015e32e034 in QCoreApplication::sendEvent (receiver=0x3027bd0, event=0x7f002a586e20) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qcoreapplication.cpp:1462
#29 0x00007f015e32ed19 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x11841e0) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qcoreapplication.cpp:1821
#30 0x00007f015e32e6ba in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qcoreapplication.cpp:1680
#31 0x00007f015e3bce60 in postEventSourceDispatch (s=0x118d560) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:277
#32 0x00007f015ae504cf in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#33 0x00007f015aea44e8 in g_main_context_iterate.constprop () from /lib64/libglib-2.0.so.0
#34 0x00007f015ae4dc03 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#35 0x00007f015e3bd59c in QEventDispatcherGlib::processEvents (this=0x124a5a0, flags=...) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:423
#36 0x00007f014ce520f4 in QXcbGlibEventDispatcher::processEvents (this=0x124a5a0, flags=...) at /home/jarek/dev/qt-515/qtbase/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:143
#37 0x00007f015e329ffb in QEventLoop::processEvents (this=0x7ffff6c24350, flags=...) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qeventloop.cpp:139
#38 0x00007f015e32a305 in QEventLoop::exec (this=0x7ffff6c24350, flags=...) at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qeventloop.cpp:232
#39 0x00007f015e32de84 in QCoreApplication::exec () at /home/jarek/dev/qt-515/qtbase/src/corelib/kernel/qcoreapplication.cpp:1375
#40 0x00007f015eacd938 in QGuiApplication::exec () at /home/jarek/dev/qt-515/qtbase/src/gui/kernel/qguiapplication.cpp:1867
#41 0x00007f015f3b998f in QApplication::exec () at /home/jarek/dev/qt-515/qtbase/src/widgets/kernel/qapplication.cpp:2829
#42 0x000000000040ea51 in main (argc=1, argv=0x7ffff6c24e78) at /home/jarek/dev/creator-master/src/app/main.cpp:815

Thread 2 (Thread 0x7f01067b4640 (LWP 176152)):
#0  0x00007f01418f4387 in std::__atomic_base<int>::operator++ (this=0x7f00e7962930) at /usr/include/c++/11/bits/atomic_base.h:376
#1  0x00007f01418f3200 in QAtomicOps<int>::ref<int> (_q_value=...) at /home/jarek/dev/qt-515/qtbase/src/corelib/thread/qatomic_cxx11.h:283
#2  0x00007f01418f2266 in QBasicAtomicInteger<int>::ref (this=0x7f00e7962930) at /home/jarek/dev/qt-515/qtbase/src/corelib/thread/qbasicatomic.h:118
#3  0x00007f01418f3ce2 in QSharedPointer<CPlusPlus::Document>::ref (this=0x7f01067b3930) at /home/jarek/dev/qt-515/qtbase/src/corelib/tools/qsharedpointer_impl.h:503
#4  0x00007f01418f2d71 in QSharedPointer<CPlusPlus::Document>::QSharedPointer (this=0x7f01067b3930, other=...) at /home/jarek/dev/qt-515/qtbase/src/corelib/tools/qsharedpointer_impl.h:327
#5  0x00007f0141916420 in (anonymous namespace)::BuiltinSymbolSearcher::runSearch (this=0x2d7bc70, future=...) at /home/jarek/dev/creator-master/src/plugins/cpptools/builtinindexingsupport.cpp:322
#6  0x00007f0141a5c84e in Utils::Internal::MemberCallable<void (CppTools::SymbolSearcher::*)(QFutureInterface<Core::SearchResultItem>&)>::operator() (this=0x7f01067b3a90, args#0=...) at /home/jarek/dev/creator-master/src/libs/utils/runextensions.h:227
#7  0x00007f0141a5c7d0 in Utils::Internal::runAsyncQFutureInterfaceDispatch<Core::SearchResultItem, Utils::Internal::MemberCallable<void (CppTools::SymbolSearcher::*)(QFutureInterface<Core::SearchResultItem>&)>>(std::integral_constant<bool, true>, QFutureInterface<Core::SearchResultItem>, Utils::Internal::MemberCallable<void (CppTools::SymbolSearcher::*)(QFutureInterface<Core::SearchResultItem>&)>&&) (futureInterface=..., function=...) at /home/jarek/dev/creator-master/src/libs/utils/runextensions.h:257
#8  0x00007f0141a5c77f in Utils::Internal::runAsyncMemberDispatch<Core::SearchResultItem, Utils::Internal::MemberCallable<void (CppTools::SymbolSearcher::*)(QFutureInterface<Core::SearchResultItem>&)>, , void>(QFutureInterface<Core::SearchResultItem>, Utils::Internal::MemberCallable<void (CppTools::SymbolSearcher::*)(QFutureInterface<Core::SearchResultItem>&)>&&) (futureInterface=..., function=...) at /home/jarek/dev/creator-master/src/libs/utils/runextensions.h:274
#9  0x00007f0141a5c6e5 in Utils::Internal::runAsyncImpl<Core::SearchResultItem, Utils::Internal::MemberCallable<void (CppTools::SymbolSearcher::*)(QFutureInterface<Core::SearchResultItem>&)>>(QFutureInterface<Core::SearchResultItem>, Utils::Internal::MemberCallable<void (CppTools::SymbolSearcher::*)(QFutureInterface<Core::SearchResultItem>&)>&&) (futureInterface=..., function=...) at /home/jarek/dev/creator-master/src/libs/utils/runextensions.h:303
#10 0x00007f0141a5c5fe in Utils::Internal::runAsyncMemberDispatch<Core::SearchResultItem, void (CppTools::SymbolSearcher::*)(QFutureInterface<Core::SearchResultItem>&), CppTools::SymbolSearcher*, , void>(QFutureInterface<Core::SearchResultItem>, void (CppTools::SymbolSearcher::*&&)(QFutureInterface<Core::SearchResultItem>&), CppTools::SymbolSearcher*&&) (futureInterface=..., function=@0x4eec858: &virtual table offset 96, obj=@0x4eec850: 0x2d7bc70) at /home/jarek/dev/creator-master/src/libs/utils/runextensions.h:285
#11 0x00007f0141a5c4a0 in Utils::Internal::runAsyncImpl<Core::SearchResultItem, void (CppTools::SymbolSearcher::*)(QFutureInterface<Core::SearchResultItem>&), CppTools::SymbolSearcher*> (futureInterface=..., function=@0x4eec858: &virtual table offset 96) at /home/jarek/dev/creator-master/src/libs/utils/runextensions.h:303
#12 0x00007f0141a5c244 in Utils::Internal::AsyncJob<Core::SearchResultItem, void (CppTools::SymbolSearcher::*)(QFutureInterface<Core::SearchResultItem>&), CppTools::SymbolSearcher*&>::runHelper<0ul, 1ul> (this=0x4eec840) at /home/jarek/dev/creator-master/src/libs/utils/runextensions.h:372
#13 0x00007f0141a5c082 in Utils::Internal::AsyncJob<Core::SearchResultItem, void (CppTools::SymbolSearcher::*)(QFutureInterface<Core::SearchResultItem>&), CppTools::SymbolSearcher*&>::run (this=0x4eec840) at /home/jarek/dev/creator-master/src/libs/utils/runextensions.h:352
#14 0x00007f015e0c4f6d in QThreadPoolThread::run (this=0x7f00dc455920) at /home/jarek/dev/qt-515/qtbase/src/corelib/thread/qthreadpool.cpp:100
#15 0x00007f015e0beed3 in QThreadPrivate::start (arg=0x7f00dc455920) at /home/jarek/dev/qt-515/qtbase/src/corelib/thread/qthread_unix.cpp:329
#16 0x00007f015d2a9299 in start_thread () from /lib64/libpthread.so.0
#17 0x00007f015db8f6a3 in clone () from /lib64/libc.so.6