[Akonadi] [Bug 501740] New: Nextcloud calendar crash when adding new events to other calendar

[Robby Engelmann]

https://bugs.kde.org/show_bug.cgi?id=501740

            Bug ID: 501740
           Summary: Nextcloud calendar crash when adding new events to
                    other calendar
    Classification: Frameworks and Libraries
           Product: Akonadi
           Version: unspecified
          Platform: openSUSE
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: DAV Resource
          Assignee: kdepim-bugs at kde.org
          Reporter: robby.engelmann at r-engelmann.de
                CC: carl at carlschwan.eu
  Target Milestone: ---

Application: akonadi_davgroupware_resource (6.4.42 (25.07.40))

ApplicationNotResponding [ANR]: false
Qt Version: 6.8.2
Frameworks Version: 6.13.0
Operating System: Linux 6.13.6-1-default x86_64
Windowing System: Wayland
Distribution: "openSUSE Tumbleweed"
DrKonqi: 6.3.80 [CoredumpBackend]

-- Information about the crash:
Nextcloud calendar crash when adding new events to other calendar

The crash can be reproduced sometimes.

-- Backtrace:
Application: MyTuxedo (akonadi_davgroupware_resource), signal: Segmentation
fault
Content of s_kcrashErrorMessage: std::unique_ptr<char []> = {get() = <optimized
out>}

warning: core file may not match specified executable file.
[New LWP 649488]
[New LWP 649491]
[New LWP 649490]

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warning: the debug information found in
"/usr/lib/debug//usr/lib64/libstdc++.so.6.0.34.debug" does not match
"/lib64/libstdc++.so.6" (CRC mismatch).
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `/usr/bin/akonadi_davgroupware_resource --identifier
akonadi_davgroupware_resour'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  __pthread_kill_implementation (threadid=<optimized out>,
signo=signo at entry=11, no_tid=no_tid at entry=0) at pthread_kill.c:44
44            return INTERNAL_SYSCALL_ERROR_P (ret) ? INTERNAL_SYSCALL_ERRNO
(ret) : 0;
[Current thread is 1 (Thread 0x7ff28077ab00 (LWP 649488))]
Function(s) ^std::(move|forward|as_const|(__)?addressof) will be skipped when
stepping.
Function(s) ^std::(shared|unique)_ptr<.*>::(get|operator) will be skipped when
stepping.
Function(s)
^std::(basic_string|vector|array|deque|(forward_)?list|(unordered_|flat_)?(multi)?(map|set)|span)<.*>::(c?r?(begin|end)|front|back|data|size|empty)
will be skipped when stepping.
Function(s) ^std::(basic_string|vector|array|deque|span)<.*>::operator.] will
be skipped when stepping.

Cannot QML trace cores :(
Python Exception <class 'AttributeError'>: 'NoneType' object has no attribute
'pointer'
Python Exception <class 'AttributeError'>: 'NoneType' object has no attribute
'pointer'
Python Exception <class 'AttributeError'>: 'NoneType' object has no attribute
'pointer'
Python Exception <class 'AttributeError'>: 'NoneType' object has no attribute
'pointer'
[Current thread is 1 (Thread 0x7ff28077ab00 (LWP 649488))]

Thread 3 (Thread 0x7ff2803ff6c0 (LWP 649490)):
#0  __syscall_cancel_arch () at
../sysdeps/unix/sysv/linux/x86_64/syscall_cancel.S:56
#1  0x00007ff28429581c in __internal_syscall_cancel (a1=<optimized out>,
a2=<optimized out>, a3=<optimized out>, a4=<optimized out>, a5=a5 at entry=8,
a6=a6 at entry=0, nr=271) at cancellation.c:49
#2  0x00007ff284295871 in __syscall_cancel (a1=<optimized out>, a2=<optimized
out>, a3=<optimized out>, a4=<optimized out>, a5=a5 at entry=8, a6=a6 at entry=0,
nr=271) at cancellation.c:75
#3  0x00007ff28430fd82 in __GI_ppoll (fds=<optimized out>, nfds=<optimized
out>, timeout=<optimized out>, sigmask=<optimized out>) at
../sysdeps/unix/sysv/linux/ppoll.c:42
#4  0x00007ff28450b48f in ??? () at /lib64/libglib-2.0.so.0
#5  0x00007ff28450bbac in g_main_context_iteration () at
/lib64/libglib-2.0.so.0
#6  0x00007ff284e05133 in QEventDispatcherGlib::processEvents
(this=0x7ff278000b70, flags=...) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/kernel/qeventdispatcher_glib.cpp:399
#7  0x00007ff284bb599b in QEventLoop::exec (this=0x7ff2803fea60, flags=...) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/global/qflags.h:34
#8  0x00007ff284ca4f9c in QThread::exec (this=<optimized out>) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/global/qflags.h:74
#9  0x00007ff284d1f717 in operator() (__closure=<optimized out>) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/thread/qthread_unix.cpp:375
#10 (anonymous
namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> >
(t=<optimized out>) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/thread/qthread_unix.cpp:311
#11 QThreadPrivate::start (arg=0x55b1f0068320) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/thread/qthread_unix.cpp:339
#12 0x00007ff284299546 in start_thread (arg=<optimized out>) at
pthread_create.c:448
#13 0x00007ff28431d94c in __GI___clone3 () at
../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 2 (Thread 0x7ff27fbfe6c0 (LWP 649491)):
#0  __syscall_cancel_arch () at
../sysdeps/unix/sysv/linux/x86_64/syscall_cancel.S:56
#1  0x00007ff28429581c in __internal_syscall_cancel (a1=<optimized out>,
a2=<optimized out>, a3=<optimized out>, a4=<optimized out>, a5=a5 at entry=8,
a6=a6 at entry=0, nr=271) at cancellation.c:49
#2  0x00007ff284295871 in __syscall_cancel (a1=<optimized out>, a2=<optimized
out>, a3=<optimized out>, a4=<optimized out>, a5=a5 at entry=8, a6=a6 at entry=0,
nr=271) at cancellation.c:75
#3  0x00007ff28430fd82 in __GI_ppoll (fds=<optimized out>, nfds=<optimized
out>, timeout=<optimized out>, sigmask=<optimized out>) at
../sysdeps/unix/sysv/linux/ppoll.c:42
#4  0x00007ff28450b48f in ??? () at /lib64/libglib-2.0.so.0
#5  0x00007ff28450bbac in g_main_context_iteration () at
/lib64/libglib-2.0.so.0
#6  0x00007ff284e05133 in QEventDispatcherGlib::processEvents
(this=0x7ff270000b70, flags=...) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/kernel/qeventdispatcher_glib.cpp:399
#7  0x00007ff284bb599b in QEventLoop::exec (this=0x7ff27fbfda10, flags=...) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/global/qflags.h:34
#8  0x00007ff284ca4f9c in QThread::exec (this=this at entry=0x7ff2851feb20
<QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager>
>::instance()::holder>) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/global/qflags.h:74
#9  0x00007ff285175a3e in QDBusConnectionManager::run (this=0x7ff2851feb20
<QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager>
>::instance()::holder>) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/dbus/qdbusconnectionmanager.cpp:144
#10 0x00007ff284d1f717 in operator() (__closure=<optimized out>) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/thread/qthread_unix.cpp:375
#11 (anonymous
namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> >
(t=<optimized out>) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/thread/qthread_unix.cpp:311
#12 QThreadPrivate::start (arg=0x7ff2851feb20
<QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager>
>::instance()::holder>) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/thread/qthread_unix.cpp:339
#13 0x00007ff284299546 in start_thread (arg=<optimized out>) at
pthread_create.c:448
#14 0x00007ff28431d94c in __GI___clone3 () at
../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 1 (Thread 0x7ff28077ab00 (LWP 649488)):
[KCrash Handler]
#5  Settings::configuredDavUrls (this=0x7ff2842a997a <_int_malloc+2972>) at
/usr/include/c++/14/bits/stl_tree.h:1025
#6  0x000055b1c5d80e75 in DavFreeBusyHandler::canHandleFreeBusy
(this=0x7ff27000fca0, email=...) at
/usr/src/debug/kdepim-runtime-25.03.70git.20250318T014035~8bb81252/resources/dav/resource/davfreebusyhandler.cpp:42
#7  0x00007ff2862d6cc3 in Akonadi__FreeBusyProviderAdaptor::qt_metacall
(this=0x55b1f0074cf0, _c=QMetaObject::InvokeMetaMethod, _id=2,
_a=0x7fffcfcfe818) at
/usr/src/debug/akonadi-calendar-25.03.70git.20250317T064721~4f5a554/build/src/core/moc_freebusyprovideradaptor.cpp:208
#8  0x00007ff2851837ae in QDBusConnectionPrivate::deliverCall
(this=this at entry=0x7ff270001430, object=object at entry=0x55b1f0074cf0, msg=...,
metaTypes=..., slotIdx=6) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/dbus/qdbusintegrator.cpp:1008
#9  0x00007ff2851844c7 in QDBusConnectionPrivate::activateCall
(this=0x7ff270001430, object=0x55b1f0074cf0, flags=..., msg=...) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/dbus/qdbusintegrator.cpp:910
#10 0x00007ff28518c9ac in QDBusConnectionPrivate::activateObject
(this=<optimized out>, node=..., msg=..., pathStartPos=<optimized out>) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/dbus/qdbusintegrator.cpp:1485
#11 0x00007ff28518ca02 in QDBusActivateObjectEvent::placeMetaCall
(this=0x7ff270019790) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/dbus/qdbusintegrator.cpp:1605
#12 0x00007ff284bf5187 in QObject::event (this=0x55b1f0082bd0,
e=0x7ff270019790) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/kernel/qobject.cpp:1418
#13 0x00007ff284badacb in doNotify (receiver=<optimized out>, event=<optimized
out>) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/kernel/qcoreapplication.cpp:1273
#14 QCoreApplication::notify (this=<optimized out>, receiver=<optimized out>,
event=<optimized out>) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/kernel/qcoreapplication.cpp:1256
#15 QCoreApplication::notifyInternal2 (receiver=0x55b1f0082bd0,
event=0x7ff270019790) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/kernel/qcoreapplication.cpp:1172
#16 0x00007ff284bb3ae0 in QCoreApplicationPrivate::sendPostedEvents
(receiver=0x0, event_type=0, data=0x55b1f005adc0) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/kernel/qcoreapplication.cpp:1946
#17 0x00007ff284e07ca7 in postEventSourceDispatch (s=0x55b1f0064410) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/kernel/qeventdispatcher_glib.cpp:246
#18 0x00007ff284509638 in ??? () at /lib64/libglib-2.0.so.0
#19 0x00007ff28450b398 in ??? () at /lib64/libglib-2.0.so.0
#20 0x00007ff28450bbac in g_main_context_iteration () at
/lib64/libglib-2.0.so.0
#21 0x00007ff284e05133 in QEventDispatcherGlib::processEvents
(this=0x55b1f0064160, flags=...) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/kernel/qeventdispatcher_glib.cpp:399
#22 0x00007ff284bb599b in QEventLoop::exec (this=this at entry=0x7fffcfcff030,
flags=..., flags at entry=...) at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/global/qflags.h:34
#23 0x00007ff284bb765a in QCoreApplication::exec () at
/usr/src/debug/qtbase-everywhere-src-6.8.2/src/corelib/global/qflags.h:74
#24 0x000055b1c5d74e84 in Akonadi::AgentBase::initCore<DavGroupwareResource>
(argc=<optimized out>, argv=<optimized out>) at
/usr/include/KPim6/AkonadiAgentBase/akonadi/agentbase.h:449
#25 main (argc=<optimized out>, argv=<optimized out>) at
/usr/src/debug/kdepim-runtime-25.03.70git.20250318T014035~8bb81252/resources/dav/resource/davgroupwareresource.cpp:1470

Reported using DrKonqi

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