Application: dolphin (17.12.3)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-24-generic x86_64
Distribution: Ubuntu 18.04 LTS

-- Information about the crash:
Dolphin crashes when clicking on icon in toolbar, seems to do it 2-3 times before it will stay open.

The crash can be reproduced every time.

-- 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 0x7f2dfee1a6c0 (LWP 7420))]

Thread 4 (Thread 0x7f2dd576a700 (LWP 7424)):
#0  0x00007f2df1631cd9 in g_mutex_lock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f2df15ec538 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2df88aa90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f2df884f9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f2df866e22a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f2df867316d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f2df375d6db in start_thread (arg=0x7f2dd576a700) at pthread_create.c:463
#7  0x00007f2dfe6a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f2de559b700 (LWP 7423)):
#0  0x00007f2dfe6920b4 in __GI___libc_read (fd=7, buf=0x7f2de559ab60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f2df1630960 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2df15ebf27 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2df15ec3e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f2df15ec54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f2df88aa90b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f2df884f9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2df866e22a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f2df8d27d45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f2df867316d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f2df375d6db in start_thread (arg=0x7f2de559b700) at pthread_create.c:463
#11 0x00007f2dfe6a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f2de7cd8700 (LWP 7422)):
#0  0x00007f2dfe696bf9 in __GI___poll (fds=0x7f2de7cd7ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f2df0f2d747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f2df0f2f36a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f2deaa852a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f2df867316d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f2df375d6db in start_thread (arg=0x7f2de7cd8700) at pthread_create.c:463
#6  0x00007f2dfe6a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f2dfee1a6c0 (LWP 7420)):
[KCrash Handler]
#6  __memmove_avx_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:371
#7  0x00007f2df8676de0 in QByteArray::QByteArray(char const*, int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f2df5fa6f20 in Baloo::DocumentDataDB::get(unsigned long long) () from /usr/lib/x86_64-linux-gnu/libKF5BalooEngine.so.5
#9  0x00007f2df5fb85f1 in Baloo::Transaction::documentData(unsigned long long) const () from /usr/lib/x86_64-linux-gnu/libKF5BalooEngine.so.5
#10 0x00007f2dfc91f0ee in Baloo::File::load() () from /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#11 0x00007f2dfcee32e0 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5BalooWidgets.so.5
#12 0x00007f2df8881122 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f2df985982c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f2df98610f4 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f2df88519a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f2df885411d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f2df88ab2c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f2df15ec287 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f2df15ec4c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f2df15ec54c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f2df88aa8ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f2df884f9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f2df8858a84 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f2dfe9b6baa in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#25 0x00007f2dfe5a3b97 in __libc_start_main (main=0x557231b2a730, argc=1, argv=0x7ffc52ced208, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc52ced1f8) at ../csu/libc-start.c:310
#26 0x0000557231b2a76a in _start ()

Reported using DrKonqi