Application: muon (5.6.0)

Qt Version: 5.6.1
Frameworks Version: 5.28.0
Operating System: Linux 4.4.0-57-generic x86_64
Distribution: Ubuntu 16.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed: I was letting Muon download the libs and apps that I selected for install and walked away, when I came back, Muon had crashed. Previously, it did the same thing during a cache refresh.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Muon Package Manager (muon), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f22f71d4900 (LWP 2615))]

Thread 4 (Thread 0x7f22e66e8700 (LWP 2621)):
#0  0x00007f230102db5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f22fd8ed39c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f22fd8ed4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f23019551cb in QEventDispatcherGlib::processEvents (this=0x7f22d80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f23018fde4a in QEventLoop::exec (this=this@entry=0x7f22e66e7cc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f23017269e4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#6  0x00007f230172b808 in QThreadPrivate::start (arg=0xd4e180) at thread/qthread_unix.cpp:341
#7  0x00007f22ff0556ba in start_thread (arg=0x7f22e66e8700) at pthread_create.c:333
#8  0x00007f230103982d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f22e7e7c700 (LWP 2617)):
#0  0x00007f230102db5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f22fd8ed39c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f22fd8ed4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f23019551cb in QEventDispatcherGlib::processEvents (this=0x7f22e00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f23018fde4a in QEventLoop::exec (this=this@entry=0x7f22e7e7bc90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f23017269e4 in QThread::exec (this=this@entry=0x7f2300331d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:500
#6  0x00007f23002be515 in QDBusConnectionManager::run (this=0x7f2300331d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:189
#7  0x00007f230172b808 in QThreadPrivate::start (arg=0x7f2300331d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:341
#8  0x00007f22ff0556ba in start_thread (arg=0x7f22e7e7c700) at pthread_create.c:333
#9  0x00007f230103982d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f22f4476700 (LWP 2616)):
#0  0x00007f230102db5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f22fb97dc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f22fb97f8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f22f6df9d29 in QXcbEventReader::run (this=0xa339b0) at qxcbconnection.cpp:1325
#4  0x00007f230172b808 in QThreadPrivate::start (arg=0xa339b0) at thread/qthread_unix.cpp:341
#5  0x00007f22ff0556ba in start_thread (arg=0x7f22f4476700) at pthread_create.c:333
#6  0x00007f230103982d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f22f71d4900 (LWP 2615)):
[KCrash Handler]
#6  0x00007f230408bee5 in pkgDepCache::operator[] (this=0x0, I=...) at /usr/include/apt-pkg/depcache.h:371
#7  QApt::Package::state (this=0xb74840) at /build/libqapt-F16X9_/libqapt-3.0.2/src/package.cpp:744
#8  0x00007f230407f241 in QApt::Backend::currentCacheState (this=<optimized out>) at /build/libqapt-F16X9_/libqapt-3.0.2/src/backend.cpp:734
#9  0x0000000000433377 in MainWindow::reload (this=0xb02dc0) at /build/muon-YDCQOE/muon-5.6.0/src/MainWindow.cpp:379
#10 0x0000000000433415 in MainWindow::transactionStatusChanged (this=0xb02dc0, status=<optimized out>) at /build/muon-YDCQOE/muon-5.6.0/src/MainWindow.cpp:304
#11 0x00007f230192c9c1 in QMetaObject::activate (sender=sender@entry=0x2778740, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffed12fde40) at kernel/qobject.cpp:3730
#12 0x00007f230192d007 in QMetaObject::activate (sender=sender@entry=0x2778740, m=m@entry=0x7f23042c4ae0 <QApt::Transaction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffed12fde40) at kernel/qobject.cpp:3595
#13 0x00007f23040b0d51 in QApt::Transaction::statusChanged (this=this@entry=0x2778740, _t1=QApt::FinishedStatus) at /build/libqapt-F16X9_/libqapt-3.0.2/obj-x86_64-linux-gnu/src/moc_transaction.cpp:523
#14 0x00007f23040a53ae in QApt::Transaction::updateProperty (this=0x2778740, type=<optimized out>, variant=...) at /build/libqapt-F16X9_/libqapt-3.0.2/src/transaction.cpp:632
#15 0x00007f23040b1c4f in QApt::Transaction::qt_static_metacall (_o=0x2778740, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /build/libqapt-F16X9_/libqapt-3.0.2/obj-x86_64-linux-gnu/src/moc_transaction.cpp:284
#16 0x00007f230192c9c1 in QMetaObject::activate (sender=sender@entry=0x27788d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x7ffed12fe0e0) at kernel/qobject.cpp:3730
#17 0x00007f230192d007 in QMetaObject::activate (sender=sender@entry=0x27788d0, m=m@entry=0x7f23042c46c0 <OrgKubuntuQaptworker3TransactionInterface::staticMetaObject>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x7ffed12fe0e0) at kernel/qobject.cpp:3595
#18 0x00007f23040ae9bf in OrgKubuntuQaptworker3TransactionInterface::propertyChanged (_t2=..., _t1=3, this=0x27788d0) at /build/libqapt-F16X9_/libqapt-3.0.2/obj-x86_64-linux-gnu/src/transactioninterface_p.moc:365
#19 OrgKubuntuQaptworker3TransactionInterface::qt_static_metacall (_o=_o@entry=0x27788d0, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=4, _a=_a@entry=0x7ffed12fe260) at /build/libqapt-F16X9_/libqapt-3.0.2/obj-x86_64-linux-gnu/src/transactioninterface_p.moc:186
#20 0x00007f23040afd80 in OrgKubuntuQaptworker3TransactionInterface::qt_metacall (this=0x27788d0, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0x7ffed12fe260) at /build/libqapt-F16X9_/libqapt-3.0.2/obj-x86_64-linux-gnu/src/transactioninterface_p.moc:306
#21 0x00007f23002ca013 in QDBusConnectionPrivate::deliverCall (this=<optimized out>, object=<optimized out>, msg=..., metaTypes=..., slotIdx=<optimized out>) at qdbusintegrator.cpp:978
#22 0x00007f230192d569 in QObject::event (this=0x27788d0, e=<optimized out>) at kernel/qobject.cpp:1256
#23 0x00007f2302235afc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x27788d0, e=0x7f22e0022bc0) at kernel/qapplication.cpp:3804
#24 0x00007f230223b036 in QApplication::notify (this=0x7ffed12fe900, receiver=0x27788d0, e=0x7f22e0022bc0) at kernel/qapplication.cpp:3561
#25 0x00007f23019000f8 in QCoreApplication::notifyInternal2 (receiver=0x27788d0, event=event@entry=0x7f22e0022bc0) at kernel/qcoreapplication.cpp:1015
#26 0x00007f2301901fba in QCoreApplication::sendEvent (event=0x7f22e0022bc0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:225
#27 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xa15360) at kernel/qcoreapplication.cpp:1650
#28 0x00007f2301902478 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1508
#29 0x00007f2301954da3 in postEventSourceDispatch (s=0xa67dd0) at kernel/qeventdispatcher_glib.cpp:270
#30 0x00007f22fd8ed1a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f22fd8ed400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f22fd8ed4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f23019551af in QEventDispatcherGlib::processEvents (this=0xa66390, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#34 0x00007f23018fde4a in QEventLoop::exec (this=this@entry=0x7ffed12fe810, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#35 0x00007f230190650c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1285
#36 0x00007f2301c467cc in QGuiApplication::exec () at kernel/qguiapplication.cpp:1607
#37 0x00007f2302232ac5 in QApplication::exec () at kernel/qapplication.cpp:2979
#38 0x0000000000431682 in main (argc=1, argv=<optimized out>) at /build/muon-YDCQOE/muon-5.6.0/src/main.cpp:62

Reported using DrKonqi