Have a crash while switching from backtrace page to bugzilla login: (gdb) bt #0 0x00007efc1ab0114d in nanosleep () from /lib64/libc.so.6 #1 0x00007efc1ab0109a in sleep () from /lib64/libc.so.6 #2 0x00007efc1e658b32 in KCrash::startProcess(int, char const**, bool) () from /lib64/libKF5Crash.so.5 #3 0x00007efc1e658fdf in KCrash::defaultCrashHandler(int) () from /lib64/libKF5Crash.so.5 #4 <signal handler called> #5 0x00007efc1f1cb1b1 in QDBusAbstractInterface::asyncCallWithArgumentList(QString const&, QList<QVariant> const&) () from /lib64/libQt5DBus.so.5 #6 0x00007efc1dc83ff1 in KWallet::Wallet::isOpen(QString const&) () from /lib64/libKF5Wallet.so.5 #7 0x000056501afa223e in BugzillaLoginPage::openWallet() () #8 0x000056501afa4f78 in BugzillaLoginPage::walletLogin() () #9 0x00007efc1b961c96 in QSingleShotTimer::timerEvent(QTimerEvent*) () from /lib64/libQt5Core.so.5 #10 0x00007efc1b9563d3 in QObject::event(QEvent*) () from /lib64/libQt5Core.so.5 #11 0x00007efc1c26331f in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5 #12 0x00007efc1c26855f in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5 #13 0x00007efc1b927b98 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt5Core.so.5 #14 0x00007efc1b97d59e in QTimerInfoList::activateTimers() () from /lib64/libQt5Core.so.5 #15 0x00007efc1b97dac1 in timerSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQt5Core.so.5 #16 0x00007efc18412703 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0 #17 0x00007efc18412ab0 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0 #18 0x00007efc18412b5c in g_main_context_iteration () from /lib64/libglib-2.0.so.0 #19 0x00007efc1b97e69b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5 #20 0x00007efc1b9258ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5 #21 0x00007efc1b92e28c in QCoreApplication::exec() () from /lib64/libQt5Core.so.5 #22 0x000056501af66e5f in main () (gdb) disas Dump of assembler code for function nanosleep: 0x00007efc1ab01120 <+0>: cmpl $0x0,0x2f95d9(%rip) # 0x7efc1adfa700 <__libc_multiple_threads> 0x00007efc1ab01127 <+7>: jne 0x7efc1ab01139 <nanosleep+25> 0x00007efc1ab01129 <+0>: mov $0x23,%eax 0x00007efc1ab0112e <+5>: syscall 0x00007efc1ab01130 <+7>: cmp $0xfffffffffffff001,%rax 0x00007efc1ab01136 <+13>: jae 0x7efc1ab01169 <nanosleep+73> 0x00007efc1ab01138 <+15>: retq 0x00007efc1ab01139 <+25>: sub $0x8,%rsp 0x00007efc1ab0113d <+29>: callq 0x7efc1ab495c0 <__libc_enable_asynccancel> 0x00007efc1ab01142 <+34>: mov %rax,(%rsp) 0x00007efc1ab01146 <+38>: mov $0x23,%eax 0x00007efc1ab0114b <+43>: syscall => 0x00007efc1ab0114d <+45>: mov (%rsp),%rdi 0x00007efc1ab01151 <+49>: mov %rax,%rdx 0x00007efc1ab01154 <+52>: callq 0x7efc1ab49620 <__libc_disable_asynccancel> 0x00007efc1ab01159 <+57>: mov %rdx,%rax 0x00007efc1ab0115c <+60>: add $0x8,%rsp 0x00007efc1ab01160 <+64>: cmp $0xfffffffffffff001,%rax 0x00007efc1ab01166 <+70>: jae 0x7efc1ab01169 <nanosleep+73> 0x00007efc1ab01168 <+72>: retq 0x00007efc1ab01169 <+73>: mov 0x2f3cf8(%rip),%rcx # 0x7efc1adf4e68 0x00007efc1ab01170 <+80>: neg %eax 0x00007efc1ab01172 <+82>: mov %eax,%fs:(%rcx) 0x00007efc1ab01175 <+85>: or $0xffffffffffffffff,%rax 0x00007efc1ab01179 <+89>: retq End of assembler dump. Fedora 24 x64 kde-runtime-drkonqi-16.04.1-1.fc24.x86_64 plasma-workspace-drkonqi-5.6.4-1.fc24.x86_64 kde-runtime-libs-16.04.1-1.fc24.x86_64 kdelibs-4.14.20-1.fc24.x86_64 qt5-qtbase-5.6.0-13.fc24.x86_64 qt5-qtbase-gui-5.6.0-13.fc24.x86_64 kf5-kcrash-5.22.0-1.fc24.x86_64 Reproducible: Sometimes
I got a similar crash on Arch Linux 64-bit with 5.7.3. Seems to be a null pointer dereference. Application: drkonqi (drkonqi), signal: Segmentation fault Using host libthread_db library "/usr/lib/libthread_db.so.1". [Current thread is 1 (Thread 0x7fc34a2587c0 (LWP 17413))] Thread 3 (Thread 0x7fc32f280700 (LWP 17419)): #0 0x00007fc3458c54ed in read () from /usr/lib/libc.so.6 #1 0x00007fc341bb8c80 in ?? () from /usr/lib/libglib-2.0.so.0 #2 0x00007fc341b75ab4 in g_main_context_check () from /usr/lib/libglib-2.0.so.0 #3 0x00007fc341b75f74 in ?? () from /usr/lib/libglib-2.0.so.0 #4 0x00007fc341b760ec in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #5 0x00007fc3461eb5ab in QEventDispatcherGlib::processEvents (this=0x7fc3280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425 #6 0x00007fc3461950ea in QEventLoop::exec (this=this@entry=0x7fc32f27fdd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #7 0x00007fc345fb80f3 in QThread::exec (this=this@entry=0x7fc347805d20 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507 #8 0x00007fc347594645 in QDBusConnectionManager::run (this=0x7fc347805d20 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:196 #9 0x00007fc345fbcd78 in QThreadPrivate::start (arg=0x7fc347805d20 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:344 #10 0x00007fc343875454 in start_thread () from /usr/lib/libpthread.so.0 #11 0x00007fc3458d27df in clone () from /usr/lib/libc.so.6 Thread 2 (Thread 0x7fc337909700 (LWP 17414)): #0 0x00007fc3458c948d in poll () from /usr/lib/libc.so.6 #1 0x00007fc340bf58e0 in ?? () from /usr/lib/libxcb.so.1 #2 0x00007fc340bf7679 in xcb_wait_for_event () from /usr/lib/libxcb.so.1 #3 0x00007fc33984a469 in QXcbEventReader::run (this=0x1fc6950) at qxcbconnection.cpp:1337 #4 0x00007fc345fbcd78 in QThreadPrivate::start (arg=0x1fc6950) at thread/qthread_unix.cpp:344 #5 0x00007fc343875454 in start_thread () from /usr/lib/libpthread.so.0 #6 0x00007fc3458d27df in clone () from /usr/lib/libc.so.6 Thread 1 (Thread 0x7fc34a2587c0 (LWP 17413)): [KCrash Handler] #5 QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::data (this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:141 #6 qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at ../../include/QtCore/../../src/corelib/global/qglobal.h:980 #7 QDBusAbstractInterface::d_func (this=<optimized out>) at qdbusabstractinterface.h:158 #8 QDBusAbstractInterface::asyncCallWithArgumentList (this=0x0, method=..., args=...) at qdbusabstractinterface.cpp:519 #9 0x00007fc348ce1511 in KWallet::Wallet::isOpen(QString const&) () from /usr/lib/libKF5Wallet.so.5 #10 0x00000000004559fe in BugzillaLoginPage::openWallet (this=0x2629120) at /tmp/plasma-workspace/src/plasma-workspace-5.7.3/drkonqi/bugzillaintegration/reportassistantpages_bugzilla.cpp:177 #11 0x0000000000457e38 in BugzillaLoginPage::walletLogin (this=0x2629120) at /tmp/plasma-workspace/src/plasma-workspace-5.7.3/drkonqi/bugzillaintegration/reportassistantpages_bugzilla.cpp:187 #12 0x00007fc3461cf306 in QtPrivate::QSlotObjectBase::call (a=0x7ffe4e0737c0, r=<optimized out>, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:130 #13 QSingleShotTimer::timerEvent (this=0x29d6010) at kernel/qtimer.cpp:317 #14 0x00007fc3461c3313 in QObject::event (this=0x29d6010, e=<optimized out>) at kernel/qobject.cpp:1285 #15 0x00007fc346e76e3c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x29d6010, e=0x7ffe4e073aa0) at kernel/qapplication.cpp:3799 #16 0x00007fc346e7e5b1 in QApplication::notify (this=0x7ffe4e073f50, receiver=0x29d6010, e=0x7ffe4e073aa0) at kernel/qapplication.cpp:3556 #17 0x00007fc346196c90 in QCoreApplication::notifyInternal2 (receiver=0x29d6010, event=event@entry=0x7ffe4e073aa0) at kernel/qcoreapplication.cpp:988 #18 0x00007fc3461ea52e in QCoreApplication::sendEvent (event=0x7ffe4e073aa0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231 #19 QTimerInfoList::activateTimers (this=0x1ff10b0) at kernel/qtimerinfo_unix.cpp:644 #20 0x00007fc3461eaa51 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:182 #21 0x00007fc341b75dd7 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0 #22 0x00007fc341b76040 in ?? () from /usr/lib/libglib-2.0.so.0 #23 0x00007fc341b760ec in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #24 0x00007fc3461eb5ab in QEventDispatcherGlib::processEvents (this=0x1ff92d0, flags=...) at kernel/qeventdispatcher_glib.cpp:425 #25 0x00007fc3461950ea in QEventLoop::exec (this=this@entry=0x7ffe4e073cf0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #26 0x00007fc34619d5dc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261 #27 0x00007fc3466dc9bc in QGuiApplication::exec () at kernel/qguiapplication.cpp:1639 #28 0x00007fc346e76d95 in QApplication::exec () at kernel/qapplication.cpp:2975 #29 0x000000000041d701 in main (argc=<optimized out>, argv=<optimized out>) at /tmp/plasma-workspace/src/plasma-workspace-5.7.3/drkonqi/main.cpp:170
Note that I have "Enable the KDE wallet subsystem" unchecked in the KDE Wallet System Settings Module.
(In reply to Jonathan Liu from comment #2) > Note that I have "Enable the KDE wallet subsystem" unchecked in the KDE > Wallet System Settings Module. Try to enable it then. Apparently it is crashing when trying to start kwalletd... The crash has already been reported though.
*** Bug 365456 has been marked as a duplicate of this bug. ***
*** Bug 368152 has been marked as a duplicate of this bug. ***
I tried it myself now, and I can confirm that the crash indeed happens when kwallet is disabled. If it is enabled, everything works as expected.
There already is an older bug report about this crash. I'm marking this one as duplicate then. *** This bug has been marked as a duplicate of bug 358260 ***