Application: kmail (5.16.1 (20.12.0))

Qt Version: 5.15.2
Frameworks Version: 5.77.0
Operating System: Linux 5.10.5-1-default x86_64
Windowing system: X11
Distribution: "openSUSE Tumbleweed"

-- Information about the crash:
- What I was doing when the application crashed:
1. I selected a folder, 
2. Created an expire (via Folder Properties)to happen on that folder after 365 days and transfer messages to wastebin 
3. Pressed "save settings and expire now" - the button didn't grey out to show it was working even though it was working fine (progress message says "trash" and not "wastebin")
4. After all messages transferred to wastebin, i selected another folder.
5. The new folder emails were displayed above the message pane.
6. I selected an email to read and the message pane got the "Retrieving messages..." 
7.  It sat there "retrieving" for ages and eventually crashed.
This happened twice in a row.

The crash can be reproduced every time.

-- Backtrace:
Application: KMail (kmail), signal: Segmentation fault

[KCrash Handler]
#4  std::__atomic_base<int>::operator++ (this=0x7ffac31f3dbc <vtable for QPixmap+20>) at /usr/include/c++/10/bits/atomic_base.h:325
#5  QAtomicOps<int>::ref<int> (_q_value=...) at ../../include/QtCore/../../src/corelib/thread/qatomic_cxx11.h:283
#6  QBasicAtomicInteger<int>::ref (this=0x7ffac31f3dbc <vtable for QPixmap+20>) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:118
#7  QExplicitlySharedDataPointer<QObjectPrivate::ConnectionData>::QExplicitlySharedDataPointer (adata=0x7ffac31f3db8 <vtable for QPixmap+16>, this=0x7ffcfe553f88) at ../../include/QtCore/../../src/corelib/tools/qshareddata.h:285
#8  doActivate<false> (sender=0x5563baae7b00, signal_index=6, argv=0x7ffcfe553fb0) at kernel/qobject.cpp:3803
#9  0x00007ffacb106322 in KMail::KMSystemTray::updateToolTip (this=0x5563baae7660, count=<optimized out>) at /usr/src/debug/kmail-20.12.1-1.1.x86_64/src/kmsystemtray.cpp:256
#10 0x00007ffacb106566 in KMail::UnityServiceManager::unreadMail (this=<optimized out>, model=0x5563ba38d8c0, parentIndex=...) at /usr/src/debug/kmail-20.12.1-1.1.x86_64/src/unityservicemanager.cpp:88
#11 0x00007ffacb109085 in KMail::UnityServiceManager::initListOfCollection (this=0x5563ba3d1e90) at /usr/src/debug/kmail-20.12.1-1.1.x86_64/src/unityservicemanager.cpp:110
#12 0x00007ffac28408c6 in QtPrivate::QSlotObjectBase::call (a=0x7ffcfe554220, r=0x5563ba3d1e90, this=0x5563ba3dab00) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#13 doActivate<false> (sender=0x5563ba35a610, signal_index=23, argv=argv@entry=0x7ffcfe554220) at kernel/qobject.cpp:3886
#14 0x00007ffac2839c20 in QMetaObject::activate (sender=<optimized out>, m=<optimized out>, local_signal_index=local_signal_index@entry=20, argv=argv@entry=0x7ffcfe554220) at kernel/qobject.cpp:3946
#15 0x00007ffac0842bc7 in Akonadi::Monitor::collectionStatisticsChanged (this=<optimized out>, _t1=<optimized out>, _t2=...) at /usr/src/debug/akonadi-server-20.12.1-1.1.x86_64/build/src/core/KF5AkonadiCore_autogen/include/moc_monitor.cpp:1004
#16 0x00007ffac084b9aa in Akonadi::MonitorPrivate::slotStatisticsChangedFinished (this=0x5563ba397280, job=0x7ffa86505d70) at /usr/src/debug/akonadi-server-20.12.1-1.1.x86_64/src/core/monitor_p.cpp:639
#17 0x00007ffac28408c6 in QtPrivate::QSlotObjectBase::call (a=0x7ffcfe5543b0, r=0x5563ba35a610, this=0x7ffa854aef90) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#18 doActivate<false> (sender=0x7ffa86505d70, signal_index=6, argv=argv@entry=0x7ffcfe5543b0) at kernel/qobject.cpp:3886
#19 0x00007ffac2839c20 in QMetaObject::activate (sender=sender@entry=0x7ffa86505d70, m=m@entry=0x7ffac3978660 <KJob::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffcfe5543b0) at kernel/qobject.cpp:3946
#20 0x00007ffac39248cc in KJob::result (this=this@entry=0x7ffa86505d70, _t1=<optimized out>, _t1@entry=0x7ffa86505d70, _t2=...) at /usr/src/debug/kcoreaddons-5.77.0-1.1.x86_64/build/src/lib/KF5CoreAddons_autogen/include/moc_kjob.cpp:576
#21 0x00007ffac3928ed3 in KJob::finishJob (this=0x7ffa86505d70, emitResult=<optimized out>) at /usr/src/debug/kcoreaddons-5.77.0-1.1.x86_64/src/lib/jobs/kjob.cpp:93
#22 0x00007ffac2836311 in QObject::event (this=0x7ffa86505d70, e=0x5563bd2b4da0) at kernel/qobject.cpp:1314
#23 0x00007ffac33ba50f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x7ffa86505d70, e=0x5563bd2b4da0) at kernel/qapplication.cpp:3632
#24 0x00007ffac280a2ea in QCoreApplication::notifyInternal2 (receiver=0x7ffa86505d70, event=0x5563bd2b4da0) at kernel/qcoreapplication.cpp:1063
#25 0x00007ffac280cd21 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x5563ba07a210) at kernel/qcoreapplication.cpp:1817
#26 0x00007ffac28621b3 in postEventSourceDispatch (s=0x5563ba19ba20) at kernel/qeventdispatcher_glib.cpp:277
#27 0x00007ffabc7cee57 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#28 0x00007ffabc7cf1d8 in ?? () from /usr/lib64/libglib-2.0.so.0
#29 0x00007ffabc7cf28f in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#30 0x00007ffac286183f in QEventDispatcherGlib::processEvents (this=0x5563ba19bb60, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#31 0x00007ffac2808cab in QEventLoop::exec (this=this@entry=0x7ffcfe5547a0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#32 0x00007ffac2810f20 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#33 0x00007ffac2c6a1bc in QGuiApplication::exec () at kernel/qguiapplication.cpp:1867
#34 0x00007ffac33ba485 in QApplication::exec () at kernel/qapplication.cpp:2824
#35 0x00005563b909d447 in main (argc=<optimized out>, argv=<optimized out>) at /usr/include/qt5/QtCore/qcoreapplication.h:116
[Inferior 1 (process 6891) detached]

Possible duplicates by query: bug 425205, bug 411883, bug 384513, bug 381621.

Reported using DrKonqi