Bug 388383

Summary: KTorrent crashes when changing path to store the data
Product: [Applications] ktorrent Reporter: Maarten Bezemer <maarten.bezemer>
Component: generalAssignee: Joris Guisson <joris.guisson>
Status: RESOLVED DOWNSTREAM    
Severity: crash Keywords: drkonqi
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Maarten Bezemer 2017-12-31 07:56:19 UTC 
Application: ktorrent (5.1.0)

Qt Version: 5.10.0
Frameworks Version: 5.41.0
Operating System: Linux 4.14.9-1-ARCH x86_64
Distribution: "Arch Linux"

-- Information about the crash:
Suddenly KTorrent started to crash when I edit the path where to store the data (after opening a magnet link).

Note that I manually edit tha path using the input field (as this much faster due to the auto-complete using the filesystem).

A second try, after restarting KTorrent, also failed.

-- Backtrace:
Application: KTorrent (ktorrent), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7faa0b136800 (LWP 3343))]

Thread 25 (Thread 0x7fa9a54da700 (LWP 3389)):
#0  0x00007faa0444ce29 in syscall () at /usr/lib/libc.so.6
#1  0x00007faa03aa75dd in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007faa03a3354f in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007faa041441b8 in __nptl_deallocate_tsd.part.5 () at /usr/lib/libpthread.so.0
#4  0x00007faa041451dd in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 24 (Thread 0x7fa9a7fff700 (LWP 3370)):
#0  0x00007faa0414b38d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007faa050af00c in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007faa09bcfbcc in  () at /usr/lib/libKF5Torrent.so.6
#3  0x00007faa050adb2d in  () at /usr/lib/libQt5Core.so.5
#4  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 23 (Thread 0x7fa9b49f4700 (LWP 3369)):
#0  0x00007faa050a4dd9 in QMutex::unlock() () at /usr/lib/libQt5Core.so.5
#1  0x00007faa09bc5a87 in  () at /usr/lib/libKF5Torrent.so.6
#2  0x00007faa09bcba92 in  () at /usr/lib/libKF5Torrent.so.6
#3  0x00007faa09bcbb66 in  () at /usr/lib/libKF5Torrent.so.6
#4  0x00007faa09bcc449 in  () at /usr/lib/libKF5Torrent.so.6
#5  0x00007faa050adb2d in  () at /usr/lib/libQt5Core.so.5
#6  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 22 (Thread 0x7fa9b51f5700 (LWP 3368)):
#0  0x00007faa0444ce29 in syscall () at /usr/lib/libc.so.6
#1  0x00007faa050a4af6 in QBasicMutex::lockInternal() () at /usr/lib/libQt5Core.so.5
#2  0x00007faa050a4e54 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007faa09bcc22e in  () at /usr/lib/libKF5Torrent.so.6
#4  0x00007faa09bcc449 in  () at /usr/lib/libKF5Torrent.so.6
#5  0x00007faa050adb2d in  () at /usr/lib/libQt5Core.so.5
#6  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 21 (Thread 0x7fa9b63bb700 (LWP 3365)):
#0  0x00007faa0444ce29 in syscall () at /usr/lib/libc.so.6
#1  0x00007faa03aa75dd in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007faa03a3354f in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007faa041441b8 in __nptl_deallocate_tsd.part.5 () at /usr/lib/libpthread.so.0
#4  0x00007faa041451dd in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 20 (Thread 0x7fa9b6ffd700 (LWP 3364)):
#0  0x00007faa0444ce29 in syscall () at /usr/lib/libc.so.6
#1  0x00007faa03aa75dd in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007faa03a3354f in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007faa041441b8 in __nptl_deallocate_tsd.part.5 () at /usr/lib/libpthread.so.0
#4  0x00007faa041451dd in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 19 (Thread 0x7fa9b77fe700 (LWP 3363)):
#0  0x00007faa0444ce29 in syscall () at /usr/lib/libc.so.6
#1  0x00007faa03aa75dd in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007faa03a3354f in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007faa041441b8 in __nptl_deallocate_tsd.part.5 () at /usr/lib/libpthread.so.0
#4  0x00007faa041451dd in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 18 (Thread 0x7fa9b7fff700 (LWP 3362)):
#0  0x00007faa0414b6cd in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007faa050aeec1 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007faa050aad91 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007faa050adb2d in  () at /usr/lib/libQt5Core.so.5
#4  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 17 (Thread 0x7fa9ccab9700 (LWP 3361)):
#0  0x00007faa0414b6cd in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007faa050aeec1 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007faa050aad91 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007faa050adb2d in  () at /usr/lib/libQt5Core.so.5
#4  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 16 (Thread 0x7fa9cdabb700 (LWP 3359)):
#0  0x00007faa0414b6cd in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007faa050aeec1 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007faa050aad91 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007faa050adb2d in  () at /usr/lib/libQt5Core.so.5
#4  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 15 (Thread 0x7fa9ce2bc700 (LWP 3358)):
#0  0x00007faa0444ce29 in syscall () at /usr/lib/libc.so.6
#1  0x00007faa03aa75dd in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007faa03a3354f in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007faa041441b8 in __nptl_deallocate_tsd.part.5 () at /usr/lib/libpthread.so.0
#4  0x00007faa041451dd in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 14 (Thread 0x7fa9ceabd700 (LWP 3357)):
[KCrash Handler]
#5  0x00007faa0a908740 in  () at /usr/lib/chromium/libwidevinecdm.so
#6  0x00007faa0a90baa7 in  () at /usr/lib/chromium/libwidevinecdm.so
#7  0x00007faa0a912812 in  () at /usr/lib/chromium/libwidevinecdm.so
#8  0x00007faa03a333e6 in  () at /usr/lib/libglib-2.0.so.0
#9  0x00007faa03a33529 in  () at /usr/lib/libglib-2.0.so.0
#10 0x00007faa041441b8 in __nptl_deallocate_tsd.part.5 () at /usr/lib/libpthread.so.0
#11 0x00007faa041451dd in start_thread () at /usr/lib/libpthread.so.0
#12 0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 13 (Thread 0x7fa9cf2be700 (LWP 3356)):
#0  0x00007faa0444ce29 in syscall () at /usr/lib/libc.so.6
#1  0x00007faa03aa75dd in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007faa03a3354f in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007faa041441b8 in __nptl_deallocate_tsd.part.5 () at /usr/lib/libpthread.so.0
#4  0x00007faa041451dd in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 12 (Thread 0x7fa9d0056700 (LWP 3355)):
#0  0x00007faa0414b38d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fa9d8474fbc in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fa9d8474ec8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7fa9d0857700 (LWP 3354)):
#0  0x00007faa0414b38d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fa9d8474fbc in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fa9d8474ec8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7fa9d1058700 (LWP 3353)):
#0  0x00007faa0414b38d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fa9d8474fbc in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fa9d8474ec8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7fa9d1859700 (LWP 3352)):
#0  0x00007faa0414b38d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fa9d8474fbc in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fa9d8474ec8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fa9d205a700 (LWP 3351)):
#0  0x00007faa0414b38d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fa9d8474fbc in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fa9d8474ec8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fa9d285b700 (LWP 3350)):
#0  0x00007faa0414b38d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fa9d8474fbc in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fa9d8474ec8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fa9d33af700 (LWP 3349)):
#0  0x00007faa0414b38d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fa9d8474fbc in  () at /usr/lib/dri/radeonsi_dri.so
#2  0x00007fa9d8474ec8 in  () at /usr/lib/dri/radeonsi_dri.so
#3  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fa9eadee700 (LWP 3348)):
#0  0x00007faa04447f2b in poll () at /usr/lib/libc.so.6
#1  0x00007faa03a7fed3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007faa03a7ffae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007faa052f66b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007faa0529882b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007faa050a878e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007faa050adb2d in  () at /usr/lib/libQt5Core.so.5
#7  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fa9ea5ed700 (LWP 3347)):
#0  0x00007faa050a4d9f in QMutex::unlock() () at /usr/lib/libQt5Core.so.5
#1  0x00007faa052f65d2 in  () at /usr/lib/libQt5Core.so.5
#2  0x00007faa03a7f771 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#3  0x00007faa03a7fdf6 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007faa03a7ffae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007faa052f66b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007faa0529882b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007faa050a878e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007faa050adb2d in  () at /usr/lib/libQt5Core.so.5
#9  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fa9ebfff700 (LWP 3345)):
#0  0x00007faa04447f2b in poll () at /usr/lib/libc.so.6
#1  0x00007faa03a7fed3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007faa03a7ffae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007faa052f66b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007faa0529882b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007faa050a878e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007faa0672f416 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007faa050adb2d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007faa0414508a in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fa9f29fd700 (LWP 3344)):
#0  0x00007faa0444ce29 in syscall () at /usr/lib/libc.so.6
#1  0x00007faa03aa75dd in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007faa03a3354f in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007faa041441b8 in __nptl_deallocate_tsd.part.5 () at /usr/lib/libpthread.so.0
#4  0x00007faa041451dd in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007faa0445242f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7faa0b136800 (LWP 3343)):
#0  0x00007faa0414643d in pthread_join () at /usr/lib/libpthread.so.0
#1  0x00007fa9a54e785b in  () at /usr/lib/gstreamer-1.0/libgstpulseaudio.so
#2  0x00007fa9a54e7a06 in  () at /usr/lib/gstreamer-1.0/libgstpulseaudio.so
#3  0x00007fa9a70afb4e in gst_element_change_state () at /usr/lib/libgstreamer-1.0.so.0
#4  0x00007fa9a70b02af in  () at /usr/lib/libgstreamer-1.0.so.0
#5  0x00007fa9a708d6a8 in  () at /usr/lib/libgstreamer-1.0.so.0
#6  0x00007fa9a70afb4e in gst_element_change_state () at /usr/lib/libgstreamer-1.0.so.0
#7  0x00007fa9a70b02af in  () at /usr/lib/libgstreamer-1.0.so.0
#8  0x00007fa9a73a40a6 in  () at /usr/lib/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#9  0x00007fa9a73a4169 in  () at /usr/lib/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#10 0x00007faa0067aae4 in Phonon::MediaNodePrivate::deleteBackendObject() () at /usr/lib/libphonon4qt5.so.4
#11 0x00007faa00659b6d in  () at /usr/lib/libphonon4qt5.so.4
#12 0x00007faa00659e63 in  () at /usr/lib/libphonon4qt5.so.4
#13 0x00007faa04393448 in __run_exit_handlers () at /usr/lib/libc.so.6
#14 0x00007faa0439349a in  () at /usr/lib/libc.so.6
#15 0x00007fa9f559d358 in  () at /usr/lib/libQt5XcbQpa.so.5
#16 0x00007faa052cb452 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#17 0x00007faa06014e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#18 0x00007faa0601c816 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#19 0x00007faa0529a1e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#20 0x00007faa0529ce46 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#21 0x00007faa052f70a4 in  () at /usr/lib/libQt5Core.so.5
#22 0x00007faa03a7e270 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#23 0x00007faa03a7ff69 in  () at /usr/lib/libglib-2.0.so.0
#24 0x00007faa03a7ffae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#25 0x00007faa052f6691 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#26 0x00007fa9f5622152 in  () at /usr/lib/libQt5XcbQpa.so.5
#27 0x00007faa0529882b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#28 0x00007faa0620bdcb in QDialog::exec() () at /usr/lib/libQt5Widgets.so.5
#29 0x00005568586c469d in  ()
#30 0x000055685865d9f3 in  ()
#31 0x000055685865e0bc in  ()
#32 0x000055685865f437 in  ()
#33 0x0000556858660bae in  ()
#34 0x00007faa052cb452 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#35 0x00007faa06014e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#36 0x00007faa0601c816 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#37 0x00007faa0529a1e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#38 0x00007faa0529ce46 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#39 0x00007faa052f70a4 in  () at /usr/lib/libQt5Core.so.5
#40 0x00007faa03a7e270 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#41 0x00007faa03a7ff69 in  () at /usr/lib/libglib-2.0.so.0
#42 0x00007faa03a7ffae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#43 0x00007faa052f6691 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#44 0x00007fa9f5622152 in  () at /usr/lib/libQt5XcbQpa.so.5
#45 0x00007faa0529882b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#46 0x00007faa052a1b18 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#47 0x0000556858657b6d in  ()
#48 0x00007faa0437cf4a in __libc_start_main () at /usr/lib/libc.so.6
#49 0x000055685865859a in _start ()

Reported using DrKonqi
Comment 1 Christoph Feck 2018-01-10 19:05:52 UTC 
I have no idea what 'libwidevinecdm' is, but it seems to be a plugin in for chromium, that is used by any code that uses QtWebEngine.

I suggest to find the authors of this library and ask for help.