Spurious crash at startup

maxwell31

Hi,
Sometimes my Qt application crashs on startup (not reproducible) and I get the output below. What can I do to find the error? I am using Qt 5.15.2

UndefinedBehaviorSanitizer:DEADLYSIGNAL
==18986==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address (pc 0x7f9c40c1536d bp 0x000000000000 sp 0x7ffc01e44710 T18986)
==18986==The signal is caused by a READ memory access.
==18986==Hint: this fault was caused by a dereference of a high value address (see register values below).  Dissassemble the provided pc to learn which register was used.
    #0 0x7f9c40c1536d in QQmlVMEMetaObject::get(QObject*) /home/qt/work/qt/qtdeclarative/src/qml/../../include/QtQml/5.15.2/QtQml/private/../../../../../src/qml/qml/qqmlvmemetaobject_p.h:243
    #1 0x7f9c40c1536d in QQmlObjectCreator::populateInstance(int, QObject*, QObject*, QQmlPropertyData const*) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1502
    #2 0x7f9c40c17596 in QQmlObjectCreator::setPropertyBinding(QQmlPropertyData const*, QV4::CompiledData::Binding const*) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:886
    #3 0x7f9c40c18542 in QQmlObjectCreator::setupBindings(bool) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:798
    #4 0x7f9c40c14d5c in QQmlObjectCreator::populateInstance(int, QObject*, QObject*, QQmlPropertyData const*) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1555
    #5 0x7f9c40c15d7c in QQmlObjectCreator::createInstance(int, QObject*, bool) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1348
    #6 0x7f9c40c17fe5 in QQmlObjectCreator::setPropertyBinding(QQmlPropertyData const*, QV4::CompiledData::Binding const*) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:847
    #7 0x7f9c40c18542 in QQmlObjectCreator::setupBindings(bool) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:798
    #8 0x7f9c40c14d5c in QQmlObjectCreator::populateInstance(int, QObject*, QObject*, QQmlPropertyData const*) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1555
    #9 0x7f9c40c15d7c in QQmlObjectCreator::createInstance(int, QObject*, bool) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1348
    #10 0x7f9c40c17fe5 in QQmlObjectCreator::setPropertyBinding(QQmlPropertyData const*, QV4::CompiledData::Binding const*) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:847
    #11 0x7f9c40c18542 in QQmlObjectCreator::setupBindings(bool) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:798
    #12 0x7f9c40c14d5c in QQmlObjectCreator::populateInstance(int, QObject*, QObject*, QQmlPropertyData const*) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1555
    #13 0x7f9c40c15d7c in QQmlObjectCreator::createInstance(int, QObject*, bool) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1348
    #14 0x7f9c40c18f55 in QQmlObjectCreator::create(int, QObject*, QQmlInstantiationInterrupt*, int) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:204
    #15 0x7f9c40ba0de5 in QQmlIncubatorPrivate::incubate(QQmlInstantiationInterrupt&) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlincubator.cpp:298
    #16 0x7f9c40ba1903 in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlincubator.cpp:89
    #17 0x7f9c40ff2251 in QQmlDelegateModelPrivate::object(QQmlListCompositor::Group, int, QQmlIncubator::IncubationMode) /home/qt/work/qt/qtdeclarative/src/qmlmodels/qqmldelegatemodel.cpp:1304
    #18 0x7f9c40ff2571 in QQmlDelegateModel::object(int, QQmlIncubator::IncubationMode) /home/qt/work/qt/qtdeclarative/src/qmlmodels/qqmldelegatemodel.cpp:1340
    #19 0x7f9c41e8cf83 in QQuickRepeaterPrivate::requestItems() /home/qt/work/qt/qtdeclarative/src/quick/items/qquickrepeater.cpp:403
    #20 0x7f9c41e8f81d in QQuickRepeater::componentComplete() /home/qt/work/qt/qtdeclarative/src/quick/items/qquickrepeater.cpp:347
    #21 0x7f9c40c127c0 in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlobjectcreator.cpp:1414
    #22 0x7f9c40b9a5f0 in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:987
    #23 0x7f9c40b9cef6 in QQmlComponentPrivate::completeCreate() /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:1079
    #24 0x7f9c40b9a0da in QQmlComponent::create(QQmlContext*) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlcomponent.cpp:820
    #25 0x7f9c40c075cb in QQmlApplicationEnginePrivate::finishLoad(QQmlComponent*) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:148
    #26 0x7f9c40c077e5 in QQmlApplicationEnginePrivate::startLoad(QUrl const&, QByteArray const&, bool) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:132
    #27 0x7f9c40c07a1c in QQmlApplicationEngine::load(QUrl const&) /home/qt/work/qt/qtdeclarative/src/qml/qml/qqmlapplicationengine.cpp:279
    #28 0x1864202 in ModuleGUIHandler::setup(QQmlApplicationEngine*) /home/james/tmpbuild/build/../src/modules/moduleguihandler/moduleguihandler.cpp:439:12
    #29 0x11eeb63 in setupModules(QQmlApplicationEngine*) /home/james/tmpbuild/build/../src/main.cpp:59:73
    #30 0x11f2a6a in main /home/james/tmpbuild/build/../src/main.cpp:179:3
    #31 0x7f9c3f8350b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
    #32 0x10e5a1d in _start (/home/james/tmpbuild/build/src/main+0x10e5a1d)

UndefinedBehaviorSanitizer can not provide additional info.
SUMMARY: UndefinedBehaviorSanitizer: SEGV /home/qt/work/qt/qtdeclarative/src/qml/../../include/QtQml/5.15.2/QtQml/private/../../../../../src/qml/qml/qqmlvmemetaobject_p.h:243 in QQmlVMEMetaObject::get(QObject*)
==18986==ABORTING