https://bugs.kde.org/show_bug.cgi?id=382693
--- Comment #1 from Ｖ字龍(Vdragon) <vdragon.tai...@gmail.com> ---
I rebuilt libqapt and muon with -g -O0, here's the stack trace:
```
Thread 1 "muon" received signal SIGSEGV, Segmentation fault.
0x00007ffff7648bed in pkgDepCache::FindPkg (this=0x0, Name="dgit") at
/usr/include/apt-pkg/depcache.h:358
358 inline PkgIterator FindPkg(std::string const &Name) {return
Cache->FindPkg(Name);};
```
```
#0 0x00007ffff7648bed in pkgDepCache::FindPkg (this=0x0, Name="dgit") at
/usr/include/apt-pkg/depcache.h:358
#1 0x00007ffff763fe28 in QApt::Backend::package (this=0xa35d80, name=...)
at libqapt-3.0.3+p16.04+git20170630.2221/src/backend.cpp:346
#2 0x00007ffff7640e1d in QApt::Backend::search (this=0xa35d80,
searchString=...)
at libqapt-3.0.3+p16.04+git20170630.2221/src/backend.cpp:585
#3 0x000000000043acfa in PackageProxyModel::search (this=0x735980,
searchText=...)
at
muon-5.7.0-0+16.04+xenial+build4/src/PackageModel/PackageProxyModel.cpp:71
#4 0x00000000004432b2 in PackageWidget::startSearch (this=0x736030)
at muon-5.7.0-0+16.04+xenial+build4/src/PackageModel/PackageWidget.cpp:410
#5 0x000000000042a1fa in ManagerWidget::reload (this=0x736030)
at muon-5.7.0-0+16.04+xenial+build4/src/ManagerWidget.cpp:63
#6 0x00000000004289da in MainWindow::reload (this=0x745000)
at muon-5.7.0-0+16.04+xenial+build4/src/MainWindow.cpp:370
#7 0x00000000004284ae in MainWindow::transactionStatusChanged (this=0x745000,
status=QApt::FinishedStatus)
at muon-5.7.0-0+16.04+xenial+build4/src/MainWindow.cpp:304
#8 0x000000000045dfac in MainWindow::qt_static_metacall (_o=0x745000,
_c=QMetaObject::InvokeMetaMethod,
_id=12, _a=0x7fffffffd040)
at
muon-5.7.0-0+16.04+xenial+build4/obj-x86_64-linux-gnu/src/moc_MainWindow.cpp:179
#9 0x00007ffff4edbc19 in QMetaObject::activate (sender=0x1d55a00,
signalOffset=<optimized out>,
local_signal_index=<optimized out>, argv=<optimized out>) at
kernel/qobject.cpp:3766
#10 0x00007ffff7682b9f in QApt::Transaction::statusChanged (this=0x1d55a00,
_t1=QApt::FinishedStatus)
at
libqapt-3.0.3+p16.04+git20170630.2221/obj-x86_64-linux-gnu/src/moc_transaction.cpp:539
#11 0x00007ffff7671964 in QApt::Transaction::updateProperty (this=0x1d55a00,
type=3, variant=...)
at libqapt-3.0.3+p16.04+git20170630.2221/src/transaction.cpp:632
#12 0x00007ffff7681d37 in QApt::Transaction::qt_static_metacall (_o=0x1d55a00,
_c=QMetaObject::InvokeMetaMethod, _id=24, _a=0x7fffffffd2e0)
at
libqapt-3.0.3+p16.04+git20170630.2221/obj-x86_64-linux-gnu/src/moc_transaction.cpp:286
#13 0x00007ffff4edbc19 in QMetaObject::activate (sender=0x1d72f50,
signalOffset=<optimized out>,
local_signal_index=<optimized out>, argv=<optimized out>) at
kernel/qobject.cpp:3766
#14 0x00007ffff767ee8b in
OrgKubuntuQaptworker3TransactionInterface::propertyChanged (this=0x1d72f50,
_t1=3,
_t2=...)
at
libqapt-3.0.3+p16.04+git20170630.2221/obj-x86_64-linux-gnu/src/transactioninterface_p.moc:372
#15 0x00007ffff767e203 in
OrgKubuntuQaptworker3TransactionInterface::qt_static_metacall (_o=0x1d72f50,
_c=QMetaObject::InvokeMetaMethod, _id=4, _a=0x7fffffffd4b0)
at
libqapt-3.0.3+p16.04+git20170630.2221/obj-x86_64-linux-gnu/src/transactioninterface_p.moc:188
#16 0x00007ffff767eba9 in
OrgKubuntuQaptworker3TransactionInterface::qt_metacall (this=0x1d72f50,
_c=QMetaObject::InvokeMetaMethod, _id=4, _a=0x7fffffffd4b0)
at
libqapt-3.0.3+p16.04+git20170630.2221/obj-x86_64-linux-gnu/src/transactioninterface_p.moc:313
#17 0x00007ffff383aee3 in QDBusConnectionPrivate::deliverCall (this=<optimized
out>, object=<optimized out>,
msg=..., metaTypes=..., slotIdx=<optimized out>) at qdbusintegrator.cpp:998
#18 0x00007ffff4edcc59 in QObject::event (this=0x1d72f50, e=<optimized out>) at
kernel/qobject.cpp:1246
#19 0x00007ffff58173fc in QApplicationPrivate::notify_helper (this=<optimized
out>, receiver=0x1d72f50,
e=0x7fffd8029aa0) at kernel/qapplication.cpp:3717
#20 0x00007ffff581ee07 in QApplication::notify (this=0x7fffffffdb70,
receiver=0x1d72f50, e=0x7fffd8029aa0)
at kernel/qapplication.cpp:3476
#21 0x00007ffff4eaf798 in QCoreApplication::notifyInternal2
(receiver=0x1d72f50,
event=event@entry=0x7fffd8029aa0) at kernel/qcoreapplication.cpp:1018
#22 0x00007ffff4eb1f7b in QCoreApplication::sendEvent (event=0x7fffd8029aa0,
receiver=<optimized out>)
at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#23 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0,
event_type=event_type@entry=0,
data=0x69fd60) at kernel/qcoreapplication.cpp:1678
#24 0x00007ffff4eb23e8 in QCoreApplication::sendPostedEvents
(receiver=receiver@entry=0x0,
event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1532
#25 0x00007ffff4f05323 in postEventSourceDispatch (s=0x6e9ce0) at
kernel/qeventdispatcher_glib.cpp:276
#26 0x00007fffeff8f197 in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fffeff8f3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fffeff8f49c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007ffff4f0492f in QEventDispatcherGlib::processEvents (this=0x6e05e0,
flags=...)
at kernel/qeventdispatcher_glib.cpp:423
#30 0x00007ffff4ead7ca in QEventLoop::exec (this=this@entry=0x7fffffffda70,
flags=..., flags@entry=...)
at kernel/qeventloop.cpp:212
#31 0x00007ffff4eb6704 in QCoreApplication::exec () at
kernel/qcoreapplication.cpp:1291
#32 0x00000000004261b5 in main (argc=1, argv=0x7fffffffdcb8)
at muon-5.7.0-0+16.04+xenial+build4/src/main.cpp:62
```
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