Details
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Bug
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Resolution: Done
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P1: Critical
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6.3.0 Alpha
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All
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e8ba9a3caa (qt/qtdeclarative/dev) e8ba9a3caa (qt/tqtc-qtdeclarative/dev) 7810d632aa (qt/qtdeclarative/6.3) 7810d632aa (qt/tqtc-qtdeclarative/6.3) 7810d632aa (qt/tqtc-qtdeclarative/6.3.1) b13b954014 (qt/tqtc-qtdeclarative/6.2)
Description
While porting an application to 6.x, we found a couple of places where we just do something like
flatItemsList.forEach(item => {
if (item !== null) {
items.insert(item, "available")
}
})
on a DelegateModelGroup. This works for the first, sometimes the second loop run, then it crashes due to an invalid cacheItem pointer:
1 QQmlDelegateModelPrivate::object qqmldelegatemodel.cpp 1258 0x7ffff7239cd0 2 QQuickRepeater::modelUpdated qquickrepeater.cpp 516 0x7ffff7723880 3 QQuickRepeater::qt_metacall moc_qquickrepeater_p.cpp 270 0x7ffff772455f 4 doActivate<false> qobject.cpp 3940 0x7ffff5185bed 5 QMetaObject::activate qobject.cpp 3974 0x7ffff517e330 6 QQmlInstanceModel::modelUpdated moc_qqmlobjectmodel_p.cpp 260 0x7ffff71f6306 7 non-virtual thunk to QQmlDelegateModelPrivate::emitModelUpdated(QQmlChangeSet const&, bool) qvariant.h 236 0x7ffff7230528 8 QQmlDelegateModelGroupPrivate::emitModelUpdated qqmldelegatemodel.cpp 2822 0x7ffff7232b73 9 QQmlDelegateModelPrivate::emitChanges qqmldelegatemodel.cpp 1890 0x7ffff72365e8 10 QQmlDelegateModelGroup::insert qqmldelegatemodel.cpp 3115 0x7ffff723d5fe 11 QQmlDelegateModelGroup::qt_metacall moc_qqmldelegatemodel_p.cpp 644 0x7ffff72445ef 12 QQmlObjectOrGadget::metacall qqmlobjectorgadget.cpp 50 0x7ffff5b8e0dd 13 operator() qv4qobjectwrapper.cpp 2338 0x7ffff5a76e8c 14 operator()<QV4::QObjectMethod::callInternal(const QV4::Value *, const QV4::Value *, int) const::<lambda()>> qv4qobjectwrapper.cpp 2322 0x7ffff5a76e8c 15 QV4::QObjectMethod::callInternal qv4qobjectwrapper.cpp 2332 0x7ffff5a76e8c 16 QV4::FunctionObject::call qv4functionobject_p.h 175 0x7ffff5aca580 17 QV4::Moth::VME::interpret qv4vme_moth.cpp 875 0x7ffff5aca580 18 QV4::Moth::VME::exec qv4vme_moth.cpp 557 0x7ffff5acdf29 19 QV4::ArrowFunction::virtualCall qv4functionobject.cpp 578 0x7ffff5a2c498 20 QV4::FunctionObject::call qv4functionobject_p.h 205 0x7ffff59d4218 ... <more>
The attached minimum example does not reproduce it 1:1, but crashes at a couple of calls earlier for a similar reason (invalid cacheItem) directly on startup.
Attachments
| For Gerrit Dashboard: QTBUG-100161 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 409327,12 | Fix index handling on insert in QQmlDelegateModel | dev | qt/qtdeclarative | Status: MERGED | +2 | 0 |
| 410513,3 | Fix index handling on insert in QQmlDelegateModel | 6.3 | qt/qtdeclarative | Status: MERGED | +2 | 0 |
| 410514,3 | Fix index handling on insert in QQmlDelegateModel | tqtc/lts-6.2 | qt/tqtc-qtdeclarative | Status: MERGED | +2 | 0 |