Bug 364038

Application: dolphin (15.12.3)

Qt Version: 5.5.1
Frameworks Version: 5.22.0
Operating System: Linux 4.4.0-22-generic x86_64
Distribution: Ubuntu 16.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:

I was copying two files -dragging it between two open tabs-, from an SD card to a hard disc.
Estaba copiando dos archivos -arrastrando entre dos pestañas- de una tarjeta SD al disco duro.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7effe6fd88c0 (LWP 6664))]

Thread 3 (Thread 0x7effe4022700 (LWP 6665)):
#0  0x00007efff88b6e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007effecffdc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007effecfff8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007effe69a6629 in QXcbEventReader::run (this=0x20a8ec0) at qxcbconnection.cpp:1253
#4  0x00007efff346d84e in QThreadPrivate::start (arg=0x20a8ec0) at thread/qthread_unix.cpp:331
#5  0x00007effefc0f6fa in start_thread (arg=0x7effe4022700) at pthread_create.c:333
#6  0x00007efff88c2b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7effd818a700 (LWP 6666)):
#0  0x00007efff34659aa in QBasicAtomicOps<8>::testAndSetRelaxed<QMutexData*> (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x2535138: 0x1) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  QGenericAtomicOps<QBasicAtomicOps<8> >::testAndSetAcquire<QMutexData*, QMutexData*> (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, _q_value=@0x2535138: 0x1) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:166
#2  QBasicAtomicPointer<QMutexData>::testAndSetAcquire (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, this=0x2535138, this@entry=0x1) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:276
#3  QBasicMutex::fastTryLock (current=<synthetic pointer>, this=0x2535138, this@entry=0x1) at thread/qmutex.h:82
#4  QMutex::lock (this=this@entry=0x2535138) at thread/qmutex.cpp:212
#5  0x00007efff36a401f in QMutexLocker::QMutexLocker (m=0x2535138, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#6  QThreadData::canWaitLocked (this=0x2535110) at ../../include/QtCore/5.5.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:240
#7  postEventSourcePrepare (s=0x7effd00012d0, timeout=0x7effd8189b44) at kernel/qeventdispatcher_glib.cpp:254
#8  0x00007effef0838ad in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007effef08424b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007effef08442c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007efff36a4a9b in QEventDispatcherGlib::processEvents (this=0x7effd00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#12 0x00007efff364bdea in QEventLoop::exec (this=this@entry=0x7effd8189d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#13 0x00007efff34688a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#14 0x00007efff346d84e in QThreadPrivate::start (arg=0x2535040) at thread/qthread_unix.cpp:331
#15 0x00007effefc0f6fa in start_thread (arg=0x7effd818a700) at pthread_create.c:333
#16 0x00007efff88c2b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7effe6fd88c0 (LWP 6664)):
[KCrash Handler]
#6  __GI___libc_free (mem=0x1) at malloc.c:2952
#7  0x00007efff367a916 in QObjectPrivate::Connection::~Connection (this=0x3477c70, __in_chrg=<optimized out>) at kernel/qobject.cpp:1039
#8  0x00007efff367ece9 in QObjectPrivate::Connection::deref (this=0x3477c70) at kernel/qobject_p.h:150
#9  QObjectPrivate::cleanConnectionLists (this=0x2dec6a0) at kernel/qobject.cpp:420
#10 0x00007efff367edc6 in QObjectPrivate::addConnection (this=0x2dec6a0, signal=signal@entry=15, c=0x2907950) at kernel/qobject.cpp:382
#11 0x00007efff367f640 in QMetaObjectPrivate::connect (sender=0x3167640, signal_index=15, smeta=<optimized out>, receiver=0x29e4b10, method_index=3, rmeta=<optimized out>, type=0, types=0x0) at kernel/qobject.cpp:3264
#12 0x00007efff36838eb in QObject::connect (sender=0x3167640, signal=<optimized out>, receiver=0x29e4b10, method=<optimized out>, type=Qt::AutoConnection) at kernel/qobject.cpp:2722
#13 0x00007efff69c48b0 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#14 0x00007efff69d64ea in ?? () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#15 0x00007efff367cfca in QMetaObject::activate (sender=sender@entry=0x25971f8, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3713
#16 0x00007efff367d7d7 in QMetaObject::activate (sender=sender@entry=0x25971f8, m=m@entry=0x7efff3897840 <QTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3578
#17 0x00007efff36fc6d0 in QTimer::timeout (this=this@entry=0x25971f8) at .moc/moc_qtimer.cpp:197
#18 0x00007efff3689878 in QTimer::timerEvent (this=0x25971f8, e=<optimized out>) at kernel/qtimer.cpp:247
#19 0x00007efff367de53 in QObject::event (this=0x25971f8, e=<optimized out>) at kernel/qobject.cpp:1261
#20 0x00007efff415305c in QApplicationPrivate::notify_helper (this=this@entry=0x208c9e0, receiver=receiver@entry=0x25971f8, e=e@entry=0x7ffffded5540) at kernel/qapplication.cpp:3716
#21 0x00007efff4158516 in QApplication::notify (this=0x7ffffded58b0, receiver=0x25971f8, e=0x7ffffded5540) at kernel/qapplication.cpp:3499
#22 0x00007efff364e62b in QCoreApplication::notifyInternal (this=0x7ffffded58b0, receiver=0x25971f8, event=event@entry=0x7ffffded5540) at kernel/qcoreapplication.cpp:965
#23 0x00007efff36a389d in QCoreApplication::sendEvent (event=0x7ffffded5540, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#24 QTimerInfoList::activateTimers (this=0x20d4b30) at kernel/qtimerinfo_unix.cpp:637
#25 0x00007efff36a3da1 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:177
#26 0x00007effef084127 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007effef084380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007effef08442c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007efff36a4a7f in QEventDispatcherGlib::processEvents (this=0x20d3e30, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#30 0x00007efff364bdea in QEventLoop::exec (this=this@entry=0x7ffffded5780, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#31 0x00007efff3653e8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#32 0x00007efff3b99c3c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#33 0x00007efff414f495 in QApplication::exec () at kernel/qapplication.cpp:2976
#34 0x00007efff8be2e2b in kdemain (argc=2, argv=<optimized out>) at /build/dolphin-HvGmRr/dolphin-15.12.3/src/main.cpp:150
#35 0x00007efff87dc830 in __libc_start_main (main=0x400710 <main(int, char**)>, argc=2, argv=0x7ffffded5a38, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffffded5a28) at ../csu/libc-start.c:291
#36 0x0000000000400749 in _start ()

Reported using DrKonqi