Bug 382916

Application: plasma-discover (5.10.4)

Qt Version: 5.9.1
Frameworks Version: 5.37.0
Operating System: Linux 4.4.0-87-generic x86_64
Distribution: KDE neon Developer Edition

-- Information about the crash:
Crashes upon start-up. System info:
Linux ubuntu 4.4.0-87-generic #110-Ubuntu SMP Tue Jul 18 12:55:35 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
ubuntu
    description: Computer
    product: VMware Virtual Platform
    vendor: VMware, Inc.
    version: None
    serial: VMware-56
    width: 64 bits
    capabilities: smbios-2.7 dmi-2.7 vsyscall32
    configuration: administrator_password=enabled boot=normal frontpanel_password=unknown keyboard_password=unknown power-on_password=disabled
  *-core
       description: Motherboard
       product: 440BX Desktop Reference Platform
       vendor: Intel Corporation
       physical id: 0
       version: None
       serial: None
     *-firmware
          description: BIOS
          vendor: Phoenix Technologies LTD
          physical id: 0
          version: 6.00
          date: 07/02/2015
          size: 86KiB
          capabilities: isa pci pcmcia pnp apm upgrade shadowing escd cdboot bootselect edd int5printscreen int9keyboard int14serial int17printer int10video acpi smartbattery biosbootspecification netboot
     *-cpu:0
          description: CPU
          product: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
          vendor: Intel Corp.
          physical id: 4
          bus info: cpu@0
          version: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
          slot: CPU #000
          size: 2600MHz
          capacity: 4230MHz
          width: 64 bits
          capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch epb fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 invpcid rtm rdseed adx smap xsaveopt dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f56b566c8c0 (LWP 2192))]

Thread 9 (Thread 0x7f566e5d8700 (LWP 2201)):
#0  0x00007f56b18a470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f56ace8038c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f56ace80712 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f566fd5c9d6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f56acea6bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f56aed086ba in start_thread (arg=0x7f566e5d8700) at pthread_create.c:333
#6  0x00007f56b18b03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f566edd9700 (LWP 2200)):
#0  0x00007f56b18a470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f56ace8038c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f56ace8049c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f56ace804d9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f56acea6bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f56aed086ba in start_thread (arg=0x7f566edd9700) at pthread_create.c:333
#6  0x00007f56b18b03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f567e1b7700 (LWP 2198)):
#0  0x00007f56acec4a94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f56ace802ae in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f56ace8049c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f56b24d594b in QEventDispatcherGlib::processEvents (this=0x7f56700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f56b247e7ca in QEventLoop::exec (this=this@entry=0x7f567e1b6d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f56b22a7cd4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f56b22ac989 in QThreadPrivate::start (arg=0x1ab3af0) at thread/qthread_unix.cpp:368
#7  0x00007f56aed086ba in start_thread (arg=0x7f567e1b7700) at pthread_create.c:333
#8  0x00007f56b18b03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f567f065700 (LWP 2197)):
#0  0x00007f56ace7f8f8 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f56ace802bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f56ace8049c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f56b24d594b in QEventDispatcherGlib::processEvents (this=0x7f56780008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f56b247e7ca in QEventLoop::exec (this=this@entry=0x7f567f064d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f56b22a7cd4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f56b22ac989 in QThreadPrivate::start (arg=0x1aaf330) at thread/qthread_unix.cpp:368
#7  0x00007f56aed086ba in start_thread (arg=0x7f567f065700) at pthread_create.c:333
#8  0x00007f56b18b03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f5687cec700 (LWP 2196)):
#0  0x00007f56acec4a94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f56ace7fdb9 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f56ace80330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f56ace8049c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f56b24d594b in QEventDispatcherGlib::processEvents (this=0x7f56800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f56b247e7ca in QEventLoop::exec (this=this@entry=0x7f5687cebc90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f56b22a7cd4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#7  0x00007f56b4cb6256 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f56b22ac989 in QThreadPrivate::start (arg=0x192c710) at thread/qthread_unix.cpp:368
#9  0x00007f56aed086ba in start_thread (arg=0x7f5687cec700) at pthread_create.c:333
#10 0x00007f56b18b03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f569ab61700 (LWP 2195)):
#0  timerSourcePrepareHelper (timeout=0x7f569ab60b14, src=0x7f568c002c70) at kernel/qeventdispatcher_glib.cpp:132
#1  timerSourcePrepare (source=0x7f568c002c70, timeout=0x7f569ab60b14) at kernel/qeventdispatcher_glib.cpp:165
#2  0x00007f56ace7f91d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f56ace802bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f56ace8049c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f56b24d594b in QEventDispatcherGlib::processEvents (this=0x7f568c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f56b247e7ca in QEventLoop::exec (this=this@entry=0x7f569ab60ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007f56b22a7cd4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#8  0x00007f56b2ca7fa5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f56b22ac989 in QThreadPrivate::start (arg=0x168e9f0) at thread/qthread_unix.cpp:368
#10 0x00007f56aed086ba in start_thread (arg=0x7f569ab61700) at pthread_create.c:333
#11 0x00007f56b18b03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f569bd72700 (LWP 2194)):
#0  0x00007f56acec4a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f56ace80290 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f56ace8049c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f56b24d594b in QEventDispatcherGlib::processEvents (this=0x7f56940008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f56b247e7ca in QEventLoop::exec (this=this@entry=0x7f569bd71cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f56b22a7cd4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f56b57b4b75 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f56b22ac989 in QThreadPrivate::start (arg=0x7f56b582ada0) at thread/qthread_unix.cpp:368
#8  0x00007f56aed086ba in start_thread (arg=0x7f569bd72700) at pthread_create.c:333
#9  0x00007f56b18b03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f56a436f700 (LWP 2193)):
#0  0x00007f56b18a470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f56acc1dc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f56acc1f8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f56a68c7329 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f56b22ac989 in QThreadPrivate::start (arg=0x1601000) at thread/qthread_unix.cpp:368
#5  0x00007f56aed086ba in start_thread (arg=0x7f56a436f700) at pthread_create.c:333
#6  0x00007f56b18b03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f56b566c8c0 (LWP 2192)):
[KCrash Handler]
#6  std::swap<QTypedArrayData<unsigned short>*> (__b=@0x7ffea9498180: 0x2336800, __a=@0x0: <error reading variable>) at /usr/include/c++/5/bits/move.h:185
#7  qSwap<QTypedArrayData<unsigned short>*> (value2=@0x7ffea9498180: 0x2336800, value1=@0x0: <error reading variable>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:866
#8  QString::operator=(QString&&) (other=<unknown type in /usr/lib/debug/.build-id/8d/2d18a0a21675a4cdb5814010669ff9bf25471d.debug, CU 0x6de62, DIE 0x917fa>, this=0x0) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:230
#9  AppStream::Pool::load (this=this@entry=0x1b84298, strerror=strerror@entry=0x0) at /workspace/build/qt/pool.cpp:77
#10 0x00007f567c501977 in AppStream::Pool::load (this=this@entry=0x1b84298) at /workspace/build/qt/pool.cpp:69
#11 0x00007f567c96fb5f in PackageKitBackend::PackageKitBackend (this=0x1b84280, parent=<optimized out>) at /workspace/build/libdiscover/backends/PackageKitBackend/PackageKitBackend.cpp:68
#12 0x00007f567c975a2b in PackageKitBackendFactory::newInstance (this=this@entry=0x1b7ca10, parent=0x16ea7f0, name=...) at /workspace/build/libdiscover/backends/PackageKitBackend/PackageKitBackend.cpp:54
#13 0x00007f56b4960a30 in DiscoverBackendsFactory::backendForFile (this=this@entry=0x7ffea949850f, libname=..., name=...) at /workspace/build/libdiscover/DiscoverBackendsFactory.cpp:65
#14 0x00007f56b49610b2 in DiscoverBackendsFactory::backend (this=this@entry=0x7ffea949850f, name=...) at /workspace/build/libdiscover/DiscoverBackendsFactory.cpp:51
#15 0x00007f56b4961516 in DiscoverBackendsFactory::<lambda(const QString&)>::operator() (name=..., __closure=<synthetic pointer>) at /workspace/build/libdiscover/DiscoverBackendsFactory.cpp:99
#16 kTransform<QVector<AbstractResourcesBackend*>, QStringList, DiscoverBackendsFactory::allBackends() const::<lambda(const QString&)> > (op=..., input=...) at /workspace/build/libdiscover/utils.h:48
#17 DiscoverBackendsFactory::allBackends (this=this@entry=0x7ffea949850f) at /workspace/build/libdiscover/DiscoverBackendsFactory.cpp:99
#18 0x00007f56b494ff17 in ResourcesModel::registerAllBackends (this=0x16ea7f0) at /workspace/build/libdiscover/resources/ResourcesModel.cpp:192
#19 0x00007f56b496f945 in ResourcesModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /workspace/build/obj-x86_64-linux-gnu/libdiscover/moc_ResourcesModel.cpp:271
#20 0x00007f56b24adc59 in QObject::event (this=0x16ea7f0, e=<optimized out>) at kernel/qobject.cpp:1246
#21 0x00007f56b34773fc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x16ea7f0, e=0x16ea1c0) at kernel/qapplication.cpp:3717
#22 0x00007f56b347ee07 in QApplication::notify (this=0x7ffea9498bf0, receiver=0x16ea7f0, e=0x16ea1c0) at kernel/qapplication.cpp:3476
#23 0x00007f56b2480798 in QCoreApplication::notifyInternal2 (receiver=0x16ea7f0, event=event@entry=0x16ea1c0) at kernel/qcoreapplication.cpp:1018
#24 0x00007f56b2482f7b in QCoreApplication::sendEvent (event=0x16ea1c0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#25 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x15e4150) at kernel/qcoreapplication.cpp:1678
#26 0x00007f56b24833e8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1532
#27 0x00007f56b24d6323 in postEventSourceDispatch (s=0x1630820) at kernel/qeventdispatcher_glib.cpp:276
#28 0x00007f56ace80197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f56ace803f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f56ace8049c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f56b24d592f in QEventDispatcherGlib::processEvents (this=0x16342d0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#32 0x00007f56b247e7ca in QEventLoop::exec (this=this@entry=0x7ffea9498b10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#33 0x00007f56b2487704 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1291
#34 0x000000000040d55e in main (argc=1, argv=<optimized out>) at /workspace/build/discover/main.cpp:151

Reported using DrKonqi