Bug 483499

Summary: Plasma discover crashes after clicking "Installed", or searching something on the discover home page.
Product: [Applications] Discover Reporter: ashilta.system
Component: discoverAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED DUPLICATE    
Severity: crash CC: aleixpol, thomas.garnier
Priority: NOR Keywords: drkonqi, qt6
Version: 6.0.2   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description ashilta.system 2024-03-14 00:16:15 UTC 
Application: plasma-discover (6.0.2)

Qt Version: 6.6.2
Frameworks Version: 6.0.0
Operating System: Linux 6.5.0-25-generic x86_64
Windowing System: X11
Distribution: KDE neon 6.0
DrKonqi: 6.0.2 [KCrashBackend]

-- Information about the crash:
Plasma discover crashes after clicking "Installed", or searching something on the discover home page. This problem begins after installing the "kde-all" package with the command "apt install --install-recommends kde-all".  Also, this problem/bug begins if you install the neon-all package with the command "apt install --install-recommends neon-all".

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault

[KCrash Handler]
#4  0x00007f3b2c28625a in KNSCore::ResultsStream::fetch() (this=0x62ea630aa7e0) at ./src/core/resultsstream.cpp:70
#5  0x00007f3b2c44cac4 in KNSResultsStream::setRequest(KNSCore::Provider::SearchRequest const&) (this=<optimized out>, request=...) at ./libdiscover/backends/KNSBackend/KNSBackend.cpp:107
#6  0x00007f3b2c4507b0 in operator() (__closure=0x62ea6261eea0) at ./libdiscover/backends/KNSBackend/KNSBackend.cpp:479
#7  QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, KNSBackend::search(const AbstractResourcesBackend::Filters&)::<lambda()> >::call (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt6/QtCore/qobjectdefs_impl.h:137
#8  QtPrivate::Functor<KNSBackend::search(const AbstractResourcesBackend::Filters&)::<lambda()>, 0>::call<QtPrivate::List<>, void> (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt6/QtCore/qobjectdefs_impl.h:339
#9  QtPrivate::QCallableObject<KNSBackend::search(const AbstractResourcesBackend::Filters&)::<lambda()>, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=0x62ea6261ee90, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/x86_64-linux-gnu/qt6/QtCore/qobjectdefs_impl.h:522
#10 0x00007f3b3dfcc9b2 in QObject::event(QEvent*) (this=0x62ea623e51a0, e=0x62ea6261ef40) at ./src/corelib/kernel/qobject.cpp:1437
#11 0x00007f3b401f181b in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x62ea623e51a0, e=0x62ea6261ef40) at ./src/widgets/kernel/qapplication.cpp:3296
#12 0x00007f3b3e075e08 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x62ea623e51a0, event=event@entry=0x62ea6261ef40) at ./src/corelib/kernel/qcoreapplication.cpp:1121
#13 0x00007f3b3e075e4d in QCoreApplication::sendEvent(QObject*, QEvent*) (receiver=<optimized out>, event=event@entry=0x62ea6261ef40) at ./src/corelib/kernel/qcoreapplication.cpp:1539
#14 0x00007f3b3e076000 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=0x0, event_type=0, data=0x62ea61920800) at ./src/corelib/kernel/qcoreapplication.cpp:1901
#15 0x00007f3b3de584f7 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x62ea61a1f0f0) at ./src/corelib/kernel/qeventdispatcher_glib.cpp:243
#16 0x00007f3b3ce79d3b in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007f3b3cecf258 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f3b3ce773e3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f3b3de55c30 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x62ea619dd2d0, flags=...) at ./src/corelib/kernel/qeventdispatcher_glib.cpp:393
#20 0x00007f3b3e07fceb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ffd1eb746e0, flags=...) at ./src/corelib/global/qflags.h:34
#21 0x00007f3b3e07a36c in QCoreApplication::exec() () at ./src/corelib/global/qflags.h:74
#22 0x00007f3b3e4e9a20 in QGuiApplication::exec() () at ./src/gui/kernel/qguiapplication.cpp:1925
#23 0x00007f3b401ee469 in QApplication::exec() () at ./src/widgets/kernel/qapplication.cpp:2574
#24 0x000062ea60774f3c in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ./discover/main.cpp:218
[Inferior 1 (process 4293) detached]

Reported using DrKonqi
Comment 1 thomas.garnier 2024-03-14 08:05:36 UTC 
Same issue here, on Archlinux, using Wayland, on Linux 6.7.8-arch1-1.1-g14

This is the terminal output:
libs QList("/usr/lib/qt6/plugins", "/usr/bin")
org.kde.plasma.libdiscover: error loading "packagekit-backend" "Impossible de charger la bibliothèque /usr/lib/qt6/plugins/discover/packagekit-backend.so : (libpackagekitqt6.so.1: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce nom)" QJsonObject({"IID":"org.kde.muon.AbstractResourcesBackendFactory","archlevel":1,"className":"PackageKitBackendFactory","debug":false,"version":394752})
org.kde.plasma.libdiscover: error loading "fwupd-backend" "Impossible de charger la bibliothèque /usr/lib/qt6/plugins/discover/fwupd-backend.so : (libfwupd.so.2: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce nom)" QJsonObject({"IID":"org.kde.muon.AbstractResourcesBackendFactory","archlevel":1,"className":"FwupdBackendFactory","debug":false,"version":394752})
org.kde.plasma.libdiscover: OdrsReviewsBackend: Fetch ratings: false
kf.newstuff.core: The file could not be parsed.
kf.newstuff.core: The file could not be parsed.
qt.qml.typeresolution.cycle: Cyclic dependency detected between "qrc:/qt/qml/org/kde/desktop/private/TextFieldContextMenu.qml" and "qrc:/qt/qml/org/kde/desktop/MenuItem.qml"
qrc:/qt/qml/org/kde/discover/qml/DiscoverWindow.qml:330:5: QML OverlaySheet: Binding loop detected for property "implicitHeight"
qrc:/qt/qml/org/kde/discover/qml/BrowsingPage.qml:17:1: QML BrowsingPage: Created graphical object was not placed in the graphics scene.
kf.newstuff.core: Could not find category "Cantor (Python 3)"
kf.newstuff.core: Could not find category "Cantor (Python 2)"
kf.newstuff.core: Could not find category "Cantor (Python 3)"
kf.newstuff.core: Could not find category "Cantor (Python 2)"
kf.newstuff.core: Could not find category "Cantor (Python 3)"
kf.newstuff.core: Could not find category "Cantor (Python 2)"
kf.newstuff.core: Could not find category "Cantor (Python 3)"
kf.newstuff.core: Could not find category "Cantor (Python 2)"
kf.newstuff.core: Could not find category "Cantor (Python 3)"
kf.newstuff.core: Could not find category "Cantor (Python 2)"
kf.newstuff.core: Could not find category "Cantor (Python 3)"
kf.newstuff.core: Could not find category "Cantor (Python 2)"
kf.newstuff.core: Could not find category "Cantor (Python 3)"
kf.newstuff.core: Could not find category "Cantor (Python 2)"
kf.newstuff.core: Could not find category "Cantor (Python 3)"
kf.newstuff.core: Could not find category "Cantor (Python 2)"
kf.newstuff.core: Could not find category "Parley"
qrc:/qt/qml/org/kde/desktop/private/TextFieldContextMenu.qml:235:5: QML MenuItem: Binding loop detected for property "implicitWidth"
qrc:/qt/qml/org/kde/discover/qml/ApplicationsListPage.qml:16:1: QML ApplicationsListPage: Created graphical object was not placed in the graphics scene.
KCrash: Application 'plasma-discover' crashing... crashRecursionCounter = 2
Erreur de segmentation (core dumped)
Comment 2 Christophe Marin 2024-03-18 13:04:14 UTC 

*** This bug has been marked as a duplicate of bug 473472 ***