Application: kmail (1.13.5)
KDE Platform Version: 4.4.5 (KDE 4.4.5)
Qt Version: 4.6.3
Operating System: Linux 2.6.32-5-amd64 x86_64
Distribution: Debian GNU/Linux testing (squeeze)

-- Information about the crash:
a) Kmail does not refresh correctIy: I had kmail showing no subfolders nor messages on certain folder on one IMAP account. I was sure they were there since I have direct access to the server and the files and directories were there when I did 'ls'. Moreover, if I tried to create a subfolder with the appropiate name, Kmail rejected the creation with a "This folder already exists" message, yet continued showing an empty folder. F5 didn't shown the content.
b) I deleted the whole content of $HOME/.kde/share/apps/kmail/imap to force kmail to refresh from the server instead of using uncorrect stale info. Then, kmail started to show strange errors relative to the deleted folders in $HOME/.kde/share/apps/kmail/imap and crashed.

Section a) of the bug has the ability to cause data loss: What if I decide to delete the folder on the IMAP server trusting kmail assertion that it is empty even when I hit F5?

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
The current source language is "auto; currently asm".
[Current thread is 1 (Thread 0x7f96f1622760 (LWP 13253))]

Thread 5 (Thread 0x7f96d20fe710 (LWP 13263)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f96ef61be8b in QWaitConditionPrivate::wait (this=<value optimized out>, mutex=0x204f4c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x204f4c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007f96eab2be56 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x24035e0, th=0x3000850) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f96eab2e6fb in ThreadWeaver::WorkingHardState::applyForWork (this=0x24270e0, th=0x3000850) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f96eab2e714 in ThreadWeaver::WorkingHardState::applyForWork (this=0x24270e0, th=0x3000850) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f96eab2e714 in ThreadWeaver::WorkingHardState::applyForWork (this=0x24270e0, th=0x3000850) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007f96eab2e714 in ThreadWeaver::WorkingHardState::applyForWork (this=0x24270e0, th=0x3000850) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#8  0x00007f96eab2cc7f in ThreadWeaver::ThreadRunHelper::run (this=0x7f96d20fde30, parent=0x24035e0, th=0x3000850) at ../../../threadweaver/Weaver/Thread.cpp:87
#9  0x00007f96eab2d1d8 in ThreadWeaver::Thread::run (this=0x3000850) at ../../../threadweaver/Weaver/Thread.cpp:142
#10 0x00007f96ef61ae35 in QThreadPrivate::start (arg=0x3000850) at thread/qthread_unix.cpp:248
#11 0x00007f96e8a078ba in start_thread (arg=<value optimized out>) at pthread_create.c:300
#12 0x00007f96ee0f601d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f96d18fd710 (LWP 13266)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f96ef61be8b in QWaitConditionPrivate::wait (this=<value optimized out>, mutex=0x204f4c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x204f4c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007f96eab2be56 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x24035e0, th=0x2dc4970) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f96eab2e6fb in ThreadWeaver::WorkingHardState::applyForWork (this=0x24270e0, th=0x2dc4970) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f96eab2cc7f in ThreadWeaver::ThreadRunHelper::run (this=0x7f96d18fce30, parent=0x24035e0, th=0x2dc4970) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f96eab2d1d8 in ThreadWeaver::Thread::run (this=0x2dc4970) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f96ef61ae35 in QThreadPrivate::start (arg=0x2dc4970) at thread/qthread_unix.cpp:248
#8  0x00007f96e8a078ba in start_thread (arg=<value optimized out>) at pthread_create.c:300
#9  0x00007f96ee0f601d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f96d10fc710 (LWP 13269)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f96ef61be8b in QWaitConditionPrivate::wait (this=<value optimized out>, mutex=0x204f4c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x204f4c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007f96eab2be56 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x24035e0, th=0x30e74f0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f96eab2e6fb in ThreadWeaver::WorkingHardState::applyForWork (this=0x24270e0, th=0x30e74f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f96eab2e714 in ThreadWeaver::WorkingHardState::applyForWork (this=0x24270e0, th=0x30e74f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f96eab2e714 in ThreadWeaver::WorkingHardState::applyForWork (this=0x24270e0, th=0x30e74f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007f96eab2cc7f in ThreadWeaver::ThreadRunHelper::run (this=0x7f96d10fbe30, parent=0x24035e0, th=0x30e74f0) at ../../../threadweaver/Weaver/Thread.cpp:87
#8  0x00007f96eab2d1d8 in ThreadWeaver::Thread::run (this=0x30e74f0) at ../../../threadweaver/Weaver/Thread.cpp:142
#9  0x00007f96ef61ae35 in QThreadPrivate::start (arg=0x30e74f0) at thread/qthread_unix.cpp:248
#10 0x00007f96e8a078ba in start_thread (arg=<value optimized out>) at pthread_create.c:300
#11 0x00007f96ee0f601d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f96d08fb710 (LWP 13272)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f96ef61be8b in QWaitConditionPrivate::wait (this=<value optimized out>, mutex=0x204f4c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x204f4c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007f96eab2be56 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x24035e0, th=0x30dae10) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f96eab2e6fb in ThreadWeaver::WorkingHardState::applyForWork (this=0x24270e0, th=0x30dae10) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f96eab2e714 in ThreadWeaver::WorkingHardState::applyForWork (this=0x24270e0, th=0x30dae10) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f96eab2cc7f in ThreadWeaver::ThreadRunHelper::run (this=0x7f96d08fae30, parent=0x24035e0, th=0x30dae10) at ../../../threadweaver/Weaver/Thread.cpp:87
#7  0x00007f96eab2d1d8 in ThreadWeaver::Thread::run (this=0x30dae10) at ../../../threadweaver/Weaver/Thread.cpp:142
#8  0x00007f96ef61ae35 in QThreadPrivate::start (arg=0x30dae10) at thread/qthread_unix.cpp:248
#9  0x00007f96e8a078ba in start_thread (arg=<value optimized out>) at pthread_create.c:300
#10 0x00007f96ee0f601d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f96f1622760 (LWP 13253)):
[KCrash Handler]
#5  0x0000000003e17a10 in ?? ()
#6  0x00007f96ef71bc73 in QObject::connect (sender=0x4ed6150, signal=0x7f96f04050b8 "2result( KJob * )", receiver=0x248c3b0, method=0x7f96f0408630 "1slotGetLastMessagesResult( KJob * )", 
    type=Qt::AutoConnection) at kernel/qobject.cpp:2518
#7  0x00007f96f007badd in KMFolderImap::reallyGetFolder (this=0x248c3b0, startUid=<value optimized out>) at ../../kmail/kmfolderimap.cpp:1291
#8  0x00007f96f007ea52 in KMFolderImap::slotCheckValidityResult (this=0x248c3b0, job=<value optimized out>) at ../../kmail/kmfolderimap.cpp:1207
#9  0x00007f96f0084765 in KMFolderImap::qt_metacall (this=0x248c3b0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff774d1370) at ./kmfolderimap.moc:185
#10 0x00007f96ef71d346 in QMetaObject::activate (sender=0x27d5dc0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7f96ef7b0c82) at kernel/qobject.cpp:3295
#11 0x00007f96f0a76802 in KJob::result (this=0x4ed6150, _t1=0x27d5dc0) at ./kjob.moc:194
#12 0x00007f96f0a76aa0 in KJob::emitResult (this=0x27d5dc0) at ../../kdecore/jobs/kjob.cpp:312
#13 0x00007f96eb76b263 in KIO::SimpleJob::slotFinished (this=0x27d5dc0) at ../../kio/kio/job.cpp:517
#14 0x00007f96eb76bc27 in KIO::TransferJob::slotFinished (this=0x27d5dc0) at ../../kio/kio/job.cpp:1097
#15 0x00007f96eb7692d1 in KIO::TransferJob::qt_metacall (this=0x27d5dc0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff774d1780) at ./jobclasses.moc:367
#16 0x00007f96ef71d346 in QMetaObject::activate (sender=0x2bd9bf0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7f96ef7b0c82) at kernel/qobject.cpp:3295
#17 0x00007f96eb82c711 in KIO::SlaveInterface::dispatch (this=0x2bd9bf0, _cmd=104, rawdata=...) at ../../kio/kio/slaveinterface.cpp:175
#18 0x00007f96eb829a83 in KIO::SlaveInterface::dispatch (this=0x2bd9bf0) at ../../kio/kio/slaveinterface.cpp:91
#19 0x00007f96eb81def6 in KIO::Slave::gotInput (this=0x2bd9bf0) at ../../kio/kio/slave.cpp:324
#20 0x00007f96eb81e0dc in KIO::Slave::qt_metacall (this=0x2bd9bf0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff774d1ba0) at ./slave.moc:82
#21 0x00007f96ef71d346 in QMetaObject::activate (sender=0x2849870, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7f96ef7b0c82) at kernel/qobject.cpp:3295
#22 0x00007f96eb739ae7 in KIO::ConnectionPrivate::dequeue (this=0x2c2e270) at ../../kio/kio/connection.cpp:82
#23 0x00007f96eb739c0d in KIO::Connection::qt_metacall (this=0x2849870, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x4267a20) at ./connection.moc:79
#24 0x00007f96ef719e89 in QObject::event (this=0x2849870, e=0x6c87bd0) at kernel/qobject.cpp:1248
#25 0x00007f96eeaaa32c in QApplicationPrivate::notify_helper (this=0x1ee7100, receiver=0x2849870, e=0x6c87bd0) at kernel/qapplication.cpp:4302
#26 0x00007f96eeab080b in QApplication::notify (this=0x7fff774d27c0, receiver=0x2849870, e=0x6c87bd0) at kernel/qapplication.cpp:4185
#27 0x00007f96f1045836 in KApplication::notify (this=0x7fff774d27c0, receiver=0x2849870, event=0x6c87bd0) at ../../kdeui/kernel/kapplication.cpp:302
#28 0x00007f96ef70a15c in QCoreApplication::notifyInternal (this=0x7fff774d27c0, receiver=0x2849870, event=0x6c87bd0) at kernel/qcoreapplication.cpp:726
#29 0x00007f96ef70d804 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x1d180e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#30 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x1d180e0) at kernel/qcoreapplication.cpp:1367
#31 0x00007f96ef733bd3 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#32 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#33 0x00007f96e5ce96c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#34 0x00007f96e5ced538 in ?? () from /lib/libglib-2.0.so.0
#35 0x00007f96e5ced6ec in g_main_context_iteration () from /lib/libglib-2.0.so.0
#36 0x00007f96ef733713 in QEventDispatcherGlib::processEvents (this=0x1d17840, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#37 0x00007f96eeb5a14e in QGuiEventDispatcherGlib::processEvents (this=0x4ed6150, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#38 0x00007f96ef708a82 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#39 0x00007f96ef708e5c in QEventLoop::exec (this=0x7fff774d25f0, flags=) at kernel/qeventloop.cpp:201
#40 0x00007f96ef70daeb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1003
#41 0x0000000000403452 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../kmail/main.cpp:156

This bug may be a duplicate of or related to bug 206877.

Possible duplicates by query: bug 203673.

Reported using DrKonqi