[Akonadi] [Bug 450217] (SEGV) Crash in Akonadi::Server::AkonadiServer::connectionDisconnected

[postix]

https://bugs.kde.org/show_bug.cgi?id=450217

--- Comment #1 from postix <postix at posteo.eu> ---
Created attachment 148014
  --> https://bugs.kde.org/attachment.cgi?id=148014&action=edit
bt full

Right after KWin Wayland crashed due to #452044, Akonadi crashed too.

BACKTRACE

```
#4  <signal handler called>
#5  std::default_delete<Akonadi::Server::Connection>::operator() (__ptr=0x111,
this=<optimized out>) at /usr/include/c++/11/bits/unique_ptr.h:79
#6  std::unique_ptr<Akonadi::Server::Connection,
std::default_delete<Akonadi::Server::Connection> >::~unique_ptr
(this=<optimized out>, this=<optimized out>) at
/usr/include/c++/11/bits/unique_ptr.h:361
#7  __gnu_cxx::new_allocator<std::unique_ptr<Akonadi::Server::Connection,
std::default_delete<Akonadi::Server::Connection> >
>::destroy<std::unique_ptr<Akonadi::Server::Connection,
std::default_delete<Akonadi::Server::Connection> > > (__p=<optimized out>,
this=<optimized out>) at /usr/include/c++/11/ext/new_allocator.h:168
#8 
std::allocator_traits<std::allocator<std::unique_ptr<Akonadi::Server::Connection,
std::default_delete<Akonadi::Server::Connection> > >
>::destroy<std::unique_ptr<Akonadi::Server::Connection,
std::default_delete<Akonadi::Server::Connection> > > (__p=<optimized out>,
__a=...) at /usr/include/c++/11/bits/alloc_traits.h:535
#9  std::vector<std::unique_ptr<Akonadi::Server::Connection,
std::default_delete<Akonadi::Server::Connection> >,
std::allocator<std::unique_ptr<Akonadi::Server::Connection,
std::default_delete<Akonadi::Server::Connection> > > >::_M_erase
(__position=std::unique_ptr<Akonadi::Server::Connection> = {get() =
0x55766233e450}, this=<optimized out>) at
/usr/include/c++/11/bits/vector.tcc:177
#10 std::vector<std::unique_ptr<Akonadi::Server::Connection,
std::default_delete<Akonadi::Server::Connection> >,
std::allocator<std::unique_ptr<Akonadi::Server::Connection,
std::default_delete<Akonadi::Server::Connection> > > >::erase
(__position=std::unique_ptr<Akonadi::Server::Connection> = {get() =
0x55766233e450}, this=<optimized out>) at
/usr/include/c++/11/bits/stl_vector.h:1431
#11 Akonadi::Server::AkonadiServer::connectionDisconnected (this=<optimized
out>) at
/usr/src/debug/akonadi-server-21.12.3-2.2.x86_64/src/server/akonadi.cpp:234
#12 0x00007f185f1d84ae in QObject::event (this=0x7fffce646fe0,
e=0x7f17fc005a00) at kernel/qobject.cpp:1314
#13 0x00007f185f1abe0f in doNotify (event=0x7f17fc005a00,
receiver=0x7fffce646fe0) at kernel/qcoreapplication.cpp:1154
#14 QCoreApplication::notify (event=<optimized out>, receiver=<optimized out>,
this=<optimized out>) at kernel/qcoreapplication.cpp:1140
#15 QCoreApplication::notifyInternal2 (receiver=0x7fffce646fe0,
event=0x7f17fc005a00) at kernel/qcoreapplication.cpp:1064
#16 0x00007f185f1aee77 in QCoreApplicationPrivate::sendPostedEvents
(receiver=0x0, event_type=0, data=0x5576622eeb80) at
kernel/qcoreapplication.cpp:1821
#17 0x00007f185f203d03 in postEventSourceDispatch (s=s at entry=0x55766232cca0) at
kernel/qeventdispatcher_glib.cpp:277
#18 0x00007f185d3ca122 in g_main_dispatch (context=0x55766232aa10) at
../glib/gmain.c:3417
#19 g_main_context_dispatch (context=0x55766232aa10) at ../glib/gmain.c:4135
#20 0x00007f185d3ca4b8 in g_main_context_iterate
(context=context at entry=0x55766232aa10, block=block at entry=1,
dispatch=dispatch at entry=1, self=<optimized out>) at ../glib/gmain.c:4211
#21 0x00007f185d3ca56f in g_main_context_iteration (context=0x55766232aa10,
may_block=1) at ../glib/gmain.c:4276
#22 0x00007f185f203384 in QEventDispatcherGlib::processEvents
(this=0x55766232a130, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#23 0x00007f185f1aa83b in QEventLoop::exec (this=this at entry=0x7fffce646e40,
flags=..., flags at entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:69
#24 0x00007f185f1b2b10 in QCoreApplication::exec () at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#25 0x00005576607826b6 in AkApplicationBase::exec (this=0x7fffce646fb0) at
/usr/src/debug/akonadi-server-21.12.3-2.2.x86_64/src/shared/akapplication.cpp:107
#26 main (argc=<optimized out>, argv=<optimized out>) at
/usr/src/debug/akonadi-server-21.12.3-2.2.x86_64/src/server/main.cpp:65
```


SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20220404
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.2
Kernel Version: 5.17.1-1-default (64-bit)
Graphics Platform: Wayland

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