dvratil added a comment.
The ASAN report, if anyone can make anything out of it:
72: =================================================================
72: ==10589==ERROR: AddressSanitizer: heap-use-after-free on address 0x60b000073c64 at pc 0x0000003bdb1c bp 0x7f913caa6270 sp 0x7f913caa6268
72: WRITE of size 4 at 0x60b000073c64 thread T11 (0x61000001c940-)
72: #0 0x3bdb1b in std::__atomic_base<int>::operator--() /usr/bin/../lib/gcc/x86_64-redhat-linux/9/../../../../include/c++/9/bits/atomic_base.h:327:16
72: #1 0x3bdaa4 in bool QAtomicOps<int>::deref<int>(std::atomic<int>&) /usr/include/qt5/QtCore/qatomic_cxx11.h:271:16
72: #2 0x3bda84 in QBasicAtomicInteger<int>::deref() /usr/include/qt5/QtCore/qbasicatomic.h:115:42
72: #3 0x3cfdfb in QSharedPointer<Akonadi::Protocol::Command>::deref(QtSharedPointer::ExternalRefCountData*) /usr/include/qt5/QtCore/qsharedpointer_impl.h:464:28
72: #4 0x3cfdc0 in QSharedPointer<Akonadi::Protocol::Command>::deref() /usr/include/qt5/QtCore/qsharedpointer_impl.h:460:7
72: #5 0x3cfd74 in QSharedPointer<Akonadi::Protocol::Command>::~QSharedPointer() /usr/include/qt5/QtCore/qsharedpointer_impl.h:315:25
72: #6 0x4027e5 in Akonadi::Server::Connection::handleIncomingData() /data/KDE/src/kde/pim/akonadi/src/server/connection.cpp:346:9
72: #7 0x40da76 in QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, void (Akonadi::Server::Connection::*)()>::call(void (Akonadi::Server::Connection::*)(), Akonadi::Server::Connection*, void**) /usr/include/qt5/QtCore/qobjectdefs_impl.h:152:13
72: #8 0x40d7c5 in void QtPrivate::FunctionPointer<void (Akonadi::Server::Connection::*)()>::call<QtPrivate::List<>, void>(void (Akonadi::Server::Connection::*)(), Akonadi::Server::Connection*, void**) /usr/include/qt5/QtCore/qobjectdefs_impl.h:185:13
72: #9 0x40d3db in QtPrivate::QSlotObject<void (Akonadi::Server::Connection::*)(), QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) /usr/include/qt5/QtCore/qobjectdefs_impl.h:414:17
72: #10 0x7f9157aafdc5 (/lib64/libQt5Core.so.5+0x29adc5)
72: #11 0x7f9157aa43c4 in QObject::event(QEvent*) (/lib64/libQt5Core.so.5+0x28f3c4)
72: #12 0x7f9157a79254 (/lib64/libQt5Core.so.5+0x264254)
72: #13 0x7f9157a792e7 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (/lib64/libQt5Core.so.5+0x2642e7)
72: #14 0x7f9157acd6b2 in QTimerInfoList::activateTimers() (/lib64/libQt5Core.so.5+0x2b86b2)
72: #15 0x7f9157acdf6b (/lib64/libQt5Core.so.5+0x2b8f6b)
72: #16 0x7f9155c74fcf in g_main_dispatch ../glib/gmain.c:3189:28
72: #17 0x7f9155c74fcf in g_main_context_dispatch ../glib/gmain.c:3854:7
72: #18 0x7f9155c75367 in g_main_context_iterate ../glib/gmain.c:3927:5
72: #19 0x7f9155c75412 in g_main_context_iteration ../glib/gmain.c:3988:12
72: #20 0x7f9157ace3f4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (/lib64/libQt5Core.so.5+0x2b93f4)
72: #21 0x7f9157a782ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (/lib64/libQt5Core.so.5+0x2632ba)
72: #22 0x7f91578d1674 in QThread::exec() (/lib64/libQt5Core.so.5+0xbc674)
72: #23 0x7f91578d27c5 (/lib64/libQt5Core.so.5+0xbd7c5)
72: #24 0x7f91574c45a1 in start_thread /usr/src/debug/glibc-2.29-18-g52b7cd6e9a/nptl/pthread_create.c:486:8
72: #25 0x7f91575e8162 in __GI___clone /usr/src/debug/glibc-2.29-18-g52b7cd6e9a/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:95
72:
72: 0x60b000073c64 is located 4 bytes inside of 104-byte region [0x60b000073c60,0x60b000073cc8)
72: freed by thread T11 (0x61000001c940-) here:
72: #0 0x7f91586e1d7f in operator delete(void*) (/usr/lib64/clang/8.0.0/lib/libclang_rt.asan-x86_64.so+0x13cd7f)
72: #1 0x3cff64 in QtSharedPointer::ExternalRefCountData::operator delete(void*) /usr/include/qt5/QtCore/qsharedpointer_impl.h:167:50
72: #2 0x3cfe4b in QSharedPointer<Akonadi::Protocol::Command>::deref(QtSharedPointer::ExternalRefCountData*) /usr/include/qt5/QtCore/qsharedpointer_impl.h:468:13
72: #3 0x3cfdc0 in QSharedPointer<Akonadi::Protocol::Command>::deref() /usr/include/qt5/QtCore/qsharedpointer_impl.h:460:7
72: #4 0x3cfd74 in QSharedPointer<Akonadi::Protocol::Command>::~QSharedPointer() /usr/include/qt5/QtCore/qsharedpointer_impl.h:315:25
72: #5 0x42fb29 in Akonadi::Server::Handler::~Handler() /data/KDE/src/kde/pim/akonadi/src/server/handler.h:52:32
72: #6 0x4eacd4 in Akonadi::Server::ItemFetchHandler::~ItemFetchHandler() /data/KDE/src/kde/pim/akonadi/src/server/handler/itemfetchhandler.h:38:42
72: #7 0x4eacf8 in Akonadi::Server::ItemFetchHandler::~ItemFetchHandler() /data/KDE/src/kde/pim/akonadi/src/server/handler/itemfetchhandler.h:38:42
72: #8 0x40cbbc in std::default_delete<Akonadi::Server::Handler>::operator()(Akonadi::Server::Handler*) const /usr/bin/../lib/gcc/x86_64-redhat-linux/9/../../../../include/c++/9/bits/unique_ptr.h:81:2
72: #9 0x40b4a7 in std::unique_ptr<Akonadi::Server::Handler, std::default_delete<Akonadi::Server::Handler> >::reset(Akonadi::Server::Handler*) /usr/bin/../lib/gcc/x86_64-redhat-linux/9/../../../../include/c++/9/bits/unique_ptr.h:399:4
72: #10 0x40269b in Akonadi::Server::Connection::handleIncomingData() /data/KDE/src/kde/pim/akonadi/src/server/connection.cpp:336:30
72: #11 0x40da76 in QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, void (Akonadi::Server::Connection::*)()>::call(void (Akonadi::Server::Connection::*)(), Akonadi::Server::Connection*, void**) /usr/include/qt5/QtCore/qobjectdefs_impl.h:152:13
72: #12 0x40d7c5 in void QtPrivate::FunctionPointer<void (Akonadi::Server::Connection::*)()>::call<QtPrivate::List<>, void>(void (Akonadi::Server::Connection::*)(), Akonadi::Server::Connection*, void**) /usr/include/qt5/QtCore/qobjectdefs_impl.h:185:13
72: #13 0x40d3db in QtPrivate::QSlotObject<void (Akonadi::Server::Connection::*)(), QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) /usr/include/qt5/QtCore/qobjectdefs_impl.h:414:17
72: #14 0x7f9157aafdc5 (/lib64/libQt5Core.so.5+0x29adc5)
72:
72: previously allocated by thread T11 (0x61000001c940-) here:
72: #0 0x7f91586e0f5f in operator new(unsigned long) (/usr/lib64/clang/8.0.0/lib/libclang_rt.asan-x86_64.so+0x13bf5f)
72: #1 0x7f915821d749 in QtSharedPointer::ExternalRefCountWithContiguousData<Akonadi::Protocol::FetchItemsCommand>::create(Akonadi::Protocol::FetchItemsCommand**, void (*)(QtSharedPointer::ExternalRefCountData*)) /usr/include/qt5/QtCore/qsharedpointer_impl.h:269:67
72: #2 0x7f915821d291 in QSharedPointer<Akonadi::Protocol::FetchItemsCommand> QSharedPointer<Akonadi::Protocol::FetchItemsCommand>::create<>() /usr/include/qt5/QtCore/qsharedpointer_impl.h:442:20
72: #3 0x7f915821cf7d in QSharedPointer<Akonadi::Protocol::Command> Akonadi::Protocol::FactoryPrivate::commandFactoryFunc<Akonadi::Protocol::FetchItemsCommand>() /data/KDE/src/kde/pim/akonadi/src/private/protocol.cpp:463:16
72: #4 0x7f915815f69a in Akonadi::Protocol::Factory::command(Akonadi::Protocol::Command::Type) /data/KDE/src/kde/pim/akonadi/src/private/protocol.cpp:487:12
72: #5 0x7f915817426a in Akonadi::Protocol::deserialize(QIODevice*) /data/KDE/build/kde/pim/akonadi/src/private/protocol_gen.cpp:244:15
72: #6 0x3fff95 in Akonadi::Server::Connection::handleIncomingData() /data/KDE/src/kde/pim/akonadi/src/server/connection.cpp:243:23
72: #7 0x40da76 in QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, void (Akonadi::Server::Connection::*)()>::call(void (Akonadi::Server::Connection::*)(), Akonadi::Server::Connection*, void**) /usr/include/qt5/QtCore/qobjectdefs_impl.h:152:13
72: #8 0x40d7c5 in void QtPrivate::FunctionPointer<void (Akonadi::Server::Connection::*)()>::call<QtPrivate::List<>, void>(void (Akonadi::Server::Connection::*)(), Akonadi::Server::Connection*, void**) /usr/include/qt5/QtCore/qobjectdefs_impl.h:185:13
72: #9 0x40d3db in QtPrivate::QSlotObject<void (Akonadi::Server::Connection::*)(), QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) /usr/include/qt5/QtCore/qobjectdefs_impl.h:414:17
72: #10 0x7f9157aafdc5 (/lib64/libQt5Core.so.5+0x29adc5)
REPOSITORY
R165 Akonadi
REVISION DETAIL
https://phabricator.kde.org/D21456
To: dvratil, #kde_pim
Cc: kde-pim, dvasin, rodsevich, winterz, vkrause, mlaurent, knauss, dvratil
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