Application: plasmashell (5.4.2)

Qt Version: 5.4.2
Operating System: Linux 4.2.0-1-amd64 x86_64
Distribution: Debian GNU/Linux testing (stretch)

-- Information about the crash:
- What I was doing when the application crashed:
The first time I use the search text box in Application Launcher aftwer logging into KDE, plasmashell crashes. I'll attach more backtraces as I generate them in case there are differences between them.

After the crash, plasmashell restarts and I am able to search normally through Application Launcher. The crash only occurs when I text search the first time.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4b9cd73940 (LWP 2324))]

Thread 11 (Thread 0x7f4b87d90700 (LWP 2326)):
#0  0x00007f4b9751352d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4b9b563252 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f4b9b564ddf in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f4b898a82f9 in QXcbEventReader::run (this=0x1b9eb10) at qxcbconnection.cpp:1105
#4  0x00007f4b97bfc25e in QThreadPrivate::start (arg=0x1b9eb10) at thread/qthread_unix.cpp:337
#5  0x00007f4b96d1c0a4 in start_thread (arg=0x7f4b87d90700) at pthread_create.c:309
#6  0x00007f4b9751c06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 10 (Thread 0x7f4b854b3700 (LWP 2374)):
#0  0x00007f4b942d21de in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4b942d3095 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4b942d32ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4b97e32e4b in QEventDispatcherGlib::processEvents (this=0x7f4b780008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4b97dd92ca in QEventLoop::exec (this=this@entry=0x7f4b854b2c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4b97bf7374 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4b9a42c055 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f4b97bfc25e in QThreadPrivate::start (arg=0x1c9f420) at thread/qthread_unix.cpp:337
#8  0x00007f4b96d1c0a4 in start_thread (arg=0x7f4b854b3700) at pthread_create.c:309
#9  0x00007f4b9751c06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 9 (Thread 0x7f4b7cbfc700 (LWP 2375)):
#0  0x00007f4b9751352d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4b942d31dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4b942d32ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4b97e32e4b in QEventDispatcherGlib::processEvents (this=0x7f4b740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4b97dd92ca in QEventLoop::exec (this=this@entry=0x7f4b7cbfbc60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4b97bf7374 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4b9a42c055 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f4b97bfc25e in QThreadPrivate::start (arg=0x22602d0) at thread/qthread_unix.cpp:337
#8  0x00007f4b96d1c0a4 in start_thread (arg=0x7f4b7cbfc700) at pthread_create.c:309
#9  0x00007f4b9751c06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7f4b72399700 (LWP 2381)):
#0  0x00007ffd5c982c9b in clock_gettime ()
#1  0x00007f4b97528cbd in __GI___clock_gettime (clock_id=<optimized out>, tp=tp@entry=0x7f4b723989d0) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f4b97cad366 in qt_clock_gettime (ts=0x7f4b723989d0, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:105
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:161
#4  qt_gettime () at tools/qelapsedtimer_unix.cpp:170
#5  0x00007f4b97e308d9 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f4b64002ed0) at kernel/qtimerinfo_unix.cpp:84
#6  0x00007f4b97e30e45 in QTimerInfoList::timerWait (this=0x7f4b64002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:379
#7  0x00007f4b97e3222e in timerSourcePrepareHelper (timeout=0x7f4b72398aa4, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f4b72398aa4) at kernel/qeventdispatcher_glib.cpp:160
#9  0x00007f4b942d276d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f4b942d310b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f4b942d32ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f4b97e32e4b in QEventDispatcherGlib::processEvents (this=0x7f4b640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#13 0x00007f4b97dd92ca in QEventLoop::exec (this=this@entry=0x7f4b72398c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x00007f4b97bf7374 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#15 0x00007f4b9a42c055 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f4b97bfc25e in QThreadPrivate::start (arg=0x23a23a0) at thread/qthread_unix.cpp:337
#17 0x00007f4b96d1c0a4 in start_thread (arg=0x7f4b72399700) at pthread_create.c:309
#18 0x00007f4b9751c06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7f4b70a45700 (LWP 2382)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4b9c7d3144 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f4b9c7d3189 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f4b96d1c0a4 in start_thread (arg=0x7f4b70a45700) at pthread_create.c:309
#4  0x00007f4b9751c06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7f4ad840e700 (LWP 2445)):
#0  0x00007f4b9751352d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4b942d31dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4b942d32ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4b97e32e4b in QEventDispatcherGlib::processEvents (this=0x7f4ad00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4b97dd92ca in QEventLoop::exec (this=this@entry=0x7f4ad840dc40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4b97bf7374 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4ada6c2a77 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f4b97bfc25e in QThreadPrivate::start (arg=0x3cd9910) at thread/qthread_unix.cpp:337
#8  0x00007f4b96d1c0a4 in start_thread (arg=0x7f4ad840e700) at pthread_create.c:309
#9  0x00007f4b9751c06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7f4acffff700 (LWP 7570)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4b97bfd4fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x63d1b30) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x68253d0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f4ae247211b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x5b30eb0, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007f4ae2472ecf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x5b30eb0, th=th@entry=0x5ec88d0, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007f4ae24770f8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x5b30fe0, th=0x5ec88d0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007f4ae247207d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x5ec88d0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007f4ae2477152 in ThreadWeaver::WorkingHardState::applyForWork (this=0x5b30fe0, th=0x5ec88d0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007f4ae247207d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x5ec88d0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007f4ae2475053 in ThreadWeaver::Thread::run (this=0x5ec88d0) at ../../src/thread.cpp:103
#10 0x00007f4b97bfc25e in QThreadPrivate::start (arg=0x5ec88d0) at thread/qthread_unix.cpp:337
#11 0x00007f4b96d1c0a4 in start_thread (arg=0x7f4acffff700) at pthread_create.c:309
#12 0x00007f4b9751c06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f4ac3ffe700 (LWP 7571)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4b97bfd4fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x63d1b30) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x68253d0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f4ae247211b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x5b30eb0, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007f4ae2472ecf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x5b30eb0, th=th@entry=0x5c40810, threadWasBusy=threadWasBusy@entry=false, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007f4ae24770f8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x5b30fe0, th=0x5c40810, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007f4ae247207d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x5c40810, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007f4ae2477152 in ThreadWeaver::WorkingHardState::applyForWork (this=0x5b30fe0, th=0x5c40810, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:73
#8  0x00007f4ae247207d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x5c40810, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#9  0x00007f4ae2475053 in ThreadWeaver::Thread::run (this=0x5c40810) at ../../src/thread.cpp:103
#10 0x00007f4b97bfc25e in QThreadPrivate::start (arg=0x5c40810) at thread/qthread_unix.cpp:337
#11 0x00007f4b96d1c0a4 in start_thread (arg=0x7f4ac3ffe700) at pthread_create.c:309
#12 0x00007f4b9751c06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f4ac37fd700 (LWP 7572)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4b97bfd4fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x63d1b30) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x68253d0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f4ae247211b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x5b30eb0, th=<optimized out>) at ../../src/weaver.cpp:594
#4  0x00007f4ae2472ecf in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x5b30eb0, th=th@entry=0x7f4ac80008e0, threadWasBusy=threadWasBusy@entry=true, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at ../../src/weaver.cpp:554
#5  0x00007f4ae24770f8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x5b30fe0, th=0x7f4ac80008e0, wasBusy=<optimized out>) at ../../src/workinghardstate.cpp:66
#6  0x00007f4ae247207d in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7f4ac80008e0, wasBusy=<optimized out>) at ../../src/weaver.cpp:568
#7  0x00007f4ae2475053 in ThreadWeaver::Thread::run (this=0x7f4ac80008e0) at ../../src/thread.cpp:103
#8  0x00007f4b97bfc25e in QThreadPrivate::start (arg=0x7f4ac80008e0) at thread/qthread_unix.cpp:337
#9  0x00007f4b96d1c0a4 in start_thread (arg=0x7f4ac37fd700) at pthread_create.c:309
#10 0x00007f4b9751c06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f4ac2ffc700 (LWP 7573)):
[KCrash Handler]
#6  0x00007f4acc9ec8c8 in memcpy (__len=96, __src=0x18, __dest=0x7f4aac003be8) at /usr/include/x86_64-linux-gnu/bits/string3.h:51
#7  mdb_txn_renew0 (txn=txn@entry=0x7f4aac003b60) at mdb.c:2593
#8  0x00007f4acc9edcc4 in mdb_txn_begin (env=0x7f4abc0036d0, parent=<optimized out>, flags=<optimized out>, ret=0x7f4ac2ffb8a8) at mdb.c:2740
#9  0x00007f4acd064bfe in Baloo::SearchStore::exec (this=this@entry=0x7f4ac2ffb990, term=..., offset=0, limit=10, sortResults=<optimized out>) at ../../../src/lib/searchstore.cpp:74
#10 0x00007f4acd053e62 in Baloo::Query::exec (this=this@entry=0x7f4ac2ffba40) at ../../../src/lib/query.cpp:210
#11 0x00007f4acd273f3f in SearchRunner::match (this=this@entry=0x6663480, context=..., type=..., category=...) at ../../../runners/baloo/baloosearchrunner.cpp:98
#12 0x00007f4acd2748b3 in SearchRunner::match (this=0x6663480, context=...) at ../../../runners/baloo/baloosearchrunner.cpp:160
#13 0x00007f4ae2b10010 in Plasma::AbstractRunner::performMatch (this=0x6663480, localContext=...) at ../../src/abstractrunner.cpp:131
#14 0x00007f4ae24768a0 in ThreadWeaver::Executor::run (this=<optimized out>, job=..., thread=<optimized out>) at ../../src/executor.cpp:52
#15 0x00007f4ae24754e0 in ThreadWeaver::Job::execute (this=<optimized out>, self=..., th=0x64405c0) at ../../src/job.cpp:83
#16 0x00007f4ae2474f8a in ThreadWeaver::Thread::run (this=0x64405c0) at ../../src/thread.cpp:114
#17 0x00007f4b97bfc25e in QThreadPrivate::start (arg=0x64405c0) at thread/qthread_unix.cpp:337
#18 0x00007f4b96d1c0a4 in start_thread (arg=0x7f4ac2ffc700) at pthread_create.c:309
#19 0x00007f4b9751c06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f4b9cd73940 (LWP 2324)):
#0  0x00007f4b9751352d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4b942d31dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4b942d32ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4b97e32e2f in QEventDispatcherGlib::processEvents (this=0x1bc0090, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f4b97dd92ca in QEventLoop::exec (this=this@entry=0x7ffd5c93c880, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4b97de0e3c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#6  0x00007f4b980f607c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1507
#7  0x00007f4b988b6025 in QApplication::exec () at kernel/qapplication.cpp:2956
#8  0x00000000004322c3 in main (argc=2, argv=<optimized out>) at ../../shell/main.cpp:176

Reported using DrKonqi