[QA] Crash after all files deleted on the server multiple times

[gabi18]

Seen with owncloud-client-2.10.1~rc2 (build 7080) on openSUSE 15.3 VirtualBox VM

Steps to reproduce:

• start the client and connect to demo.owncloud.org
• wait several hours while the data are deleted on demo.owncloud.org multiple times
• click on "Remove all files"

Result: The client crashes with backtrace:

#0  OCC::SyncEngine::<lambda()>::operator()(void) const (__closure=__closure@entry=0x2cf4ba8)
    at /usr/src/packages/BUILD/btr-2.10.1-rc2.7111/src/libsync/syncengine.cpp:595
#1  0x00007fb850dfec09 in OCC::SyncEngine::<lambda(bool)>::operator() (cancel=false, __closure=0x2cf4b90)
    at /usr/src/packages/BUILD/btr-2.10.1-rc2.7111/src/libsync/syncengine.cpp:718
#2  std::_Function_handler<void(bool), OCC::SyncEngine::slotDiscoveryFinished()::<lambda(bool)> >::_M_invoke(const std::_Any_data &, bool &&) (__functor=..., __args#0=<optimized out>) at /usr/include/c++/7/bits/std_function.h:316
#3  0x000000000045e0e3 in std::function<void (bool)>::operator()(bool) const (__args#0=<optimized out>, this=0x2cc8d40)
    at /usr/include/c++/7/bits/std_function.h:706
#4  OCC::Folder::<lambda()>::operator() (__closure=0x2cc8d30) at /usr/src/packages/BUILD/btr-2.10.1-rc2.7111/src/gui/folder.cpp:1317
#5  QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, OCC::Folder::slotAboutToRemoveAllFiles(OCC::SyncFileItem::Direction, std::function<void(bool)>)::<lambda()> >::call (arg=<optimized out>, f=...)
    at /opt/ownCloud/qt-5.12.10/include/qt5/QtCore/qobjectdefs_impl.h:146
#6  QtPrivate::Functor<OCC::Folder::slotAboutToRemoveAllFiles(OCC::SyncFileItem::Direction, std::function<void(bool)>)::<lambda()>, 0>::call<QtPrivate::List<>, void> (arg=<optimized out>, f=...) at /opt/ownCloud/qt-5.12.10/include/qt5/QtCore/qobjectdefs_impl.h:256
#7  QtPrivate::QFunctorSlotObject<OCC::Folder::slotAboutToRemoveAllFiles(OCC::SyncFileItem::Direction, std::function<void(bool)>)::<lambda()>, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, 
    this_=0x2cc8d20, r=<optimized out>, a=<optimized out>, ret=<optimized out>)
    at /opt/ownCloud/qt-5.12.10/include/qt5/QtCore/qobjectdefs_impl.h:439
#8  0x00007fb84f641db4 in QMetaObject::activate(QObject*, int, int, void**) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Core.so.5
#9  0x00007fb851cf334e in QDialog::finished(int) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#10 0x00007fb851d252a8 in QMessageBoxPrivate::_q_buttonClicked(QAbstractButton*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#11 0x00007fb851d26be8 in QMessageBox::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) ()
   from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#12 0x00007fb84f641cba in QMetaObject::activate(QObject*, int, int, void**) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Core.so.5
#13 0x00007fb851c9364f in QDialogButtonBox::clicked(QAbstractButton*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#14 0x00007fb851c93c06 in QDialogButtonBoxPrivate::_q_handleButtonClicked() () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#15 0x00007fb84f641cba in QMetaObject::activate(QObject*, int, int, void**) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Core.so.5
#16 0x00007fb851bf7da2 in QAbstractButton::clicked(bool) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#17 0x00007fb851bf7f8a in QAbstractButtonPrivate::emitClicked() () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#18 0x00007fb851bf92aa in QAbstractButtonPrivate::click() () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#19 0x00007fb851bf9475 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#20 0x00007fb851b55d88 in QWidget::event(QEvent*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#21 0x00007fb851b1a25c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#22 0x00007fb851b221f8 in QApplication::notify(QObject*, QEvent*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#23 0x00007fb84f613858 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Core.so.5
#24 0x00007fb851b2089c in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#25 0x00007fb851b6fd96 in QWidgetWindow::handleMouseEvent(QMouseEvent*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#26 0x00007fb851b7290b in QWidgetWindow::event(QEvent*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#27 0x00007fb851b1a25c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#28 0x00007fb851b212a0 in QApplication::notify(QObject*, QEvent*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Widgets.so.5
#29 0x00007fb84f613858 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Core.so.5
#30 0x00007fb85139038d in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) ()
   from /opt/ownCloud/qt-5.12.10/lib64/libQt5Gui.so.5
--Type <RET> for more, q to quit, c to continue without paging--
#31 0x00007fb851391725 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) ()
   from /opt/ownCloud/qt-5.12.10/lib64/libQt5Gui.so.5
#32 0x00007fb85136cb5b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /opt/ownCloud/qt-5.12.10/lib64/libQt5Gui.so.5
#33 0x00007fb84843788a in xcbSourceDispatch(_GSource*, int (*)(void*), void*) ()
   from /opt/ownCloud/qt-5.12.10/lib64/qt5/plugins/platforms/../../../libQt5XcbQpa.so.5
#34 0x00007fb84d294694 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#35 0x00007fb84d294a30 in ?? () from /usr/lib64/libglib-2.0.so.0
#36 0x00007fb84d294abc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#37 0x00007fb84f66d7cf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /opt/ownCloud/qt-5.12.10/lib64/libQt5Core.so.5
#38 0x00007fb84f61209a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Core.so.5
#39 0x00007fb84f61aba0 in QCoreApplication::exec() () from /opt/ownCloud/qt-5.12.10/lib64/libQt5Core.so.5
#40 0x000000000044c25f in main (argc=<optimized out>, argv=<optimized out>)
    at /usr/src/packages/BUILD/btr-2.10.1-rc2.7111/src/gui/main.cpp:157

20220331_0702_owncloud.log.0.gz

[fmoc]

I presume that this can be reproduced by resetting the instance (i.e., "removing all files") at least once after the dialog has been shown already.

[github-actions[bot]]

This issue was marked stale because it has been open for 30 days with no activity. Remove the stale label or comment or this will be closed in 7 days.

[gabi18]

Seen again with ownCloud-3.0.0-daily20220530.7712.x64.msi on Windows 10 21H2, crash report sent, ID: 65639364-853f-48f3-8743-72dcba857bd2

[github-actions[bot]]

This issue was marked stale because it has been open for 30 days with no activity. Remove the stale label or comment or this will be closed in 7 days.

[TheOneRing]

Supposed to be fixed in 5.0