Application: kcmshell5 (5.19.1) Qt Version: 5.15.0 Frameworks Version: 5.71.0 Operating System: Linux 5.7.2-arch1-1 x86_64 Windowing system: X11 Distribution: Arch Linux -- Information about the crash: Click the application icon in the top-left corner of the title bar. Navigate to 'More Actions' and click 'Configure Window Manager'. The crash happens and a notification shows up. The crash can be reproduced every time. -- Backtrace: Application: System Settings Module (kcmshell5), signal: Segmentation fault [KCrash Handler] #4 0x00007f560de14437 in QObjectPrivate::setParent_helper(QObject*) () from /usr/lib/libQt5Core.so.5 #5 0x00007f5600202630 in ?? () from /usr/lib/qt/plugins/kcm_kwinoptions.so #6 0x00007f56001f4757 in ?? () from /usr/lib/qt/plugins/kcm_kwinoptions.so #7 0x00007f560ef4fad5 in KPluginFactory::create(char const*, QWidget*, QObject*, QList<QVariant> const&, QString const&) () from /usr/lib/libKF5CoreAddons.so.5 #8 0x00007f560f27b062 in ?? () from /usr/lib/libKF5KCMUtils.so.5 #9 0x00007f560f27a1d3 in KCModuleLoader::loadModule(KCModuleInfo const&, KCModuleLoader::ErrorReporting, QWidget*, QStringList const&) () from /usr/lib/libKF5KCMUtils.so.5 #10 0x00007f560f281e64 in ?? () from /usr/lib/libKF5KCMUtils.so.5 #11 0x00007f560f2822cb in KCModuleProxy::realModule() const () from /usr/lib/libKF5KCMUtils.so.5 #12 0x00007f560f280107 in KCMultiDialog::addModule(KCModuleInfo const&, KPageWidgetItem*, QStringList const&) () from /usr/lib/libKF5KCMUtils.so.5 #13 0x00005625a115a0f6 in ?? () #14 0x00007f560d7b0002 in __libc_start_main () from /usr/lib/libc.so.6 #15 0x00005625a115abce in _start () [Inferior 1 (process 116512) detached]
Ooh, me too. yet kcmshell5 kwinoptions works
Created attachment 129454 [details] New crash information added by DrKonqi kcmshell5 (5.19.1) using Qt 5.14.2 I've got just the same bug on 2 of my computers. Here is backtrace. -- Backtrace (Reduced): #4 QObjectPrivate::setParent_helper (this=0x5628a13d12e0, o=0x5628a13d10b0) at kernel/qobject.h:132 #5 0x00007fbb674020b2 in KWinOptionsSettings::KWinOptionsSettings (this=0x5628a13d1230, parent=0x7ffda9be73e8) at /usr/src/debug/kwin-5.19.1-1.fc32.x86_64/x86_64-redhat-linux-gnu/kcmkwin/kwinoptions/kwinoptions_settings.cpp:9 #6 0x00007fbb673f4ab8 in KFocusConfigStandalone::KFocusConfigStandalone (parent=0x5628a13cf920, this=0x5628a13d10b0) at /usr/src/debug/kwin-5.19.1-1.fc32.x86_64/kcmkwin/kwinoptions/main.cpp:44 #7 KPluginFactory::createInstance<KFocusConfigStandalone, QWidget> (parentWidget=<optimized out>, parent=<optimized out>, args=...) at /usr/include/KF5/KCoreAddons/kpluginfactory.h:520 #8 0x00007fbb87f89f72 in KPluginFactory::create (this=this@entry=0x5628a1301010, iface=0x7fbb867f79b8 "KCModule", parentWidget=parentWidget@entry=0x0, parent=parent@entry=0x5628a13cf920, args=..., keyword=...) at /usr/src/debug/kf5-kcoreaddons-5.71.0-1.fc32.x86_64/src/lib/plugin/kpluginfactory.cpp:133
Same or similar bug Application: kcmshell5 (5.19.0) Qt Version: 5.15.0 Frameworks Version: 5.70.0 Operating System: Linux 5.7.1-1-default x86_64 Windowing system: X11 Distribution: "openSUSE Tumbleweed" The crash can be reproduced every time. -- Backtrace: Application: (kcmshell5), signal: Segmentation fault [KCrash Handler] #4 0x00007fc321497b97 in std::__atomic_base<QThreadData*>::load (__m=std::memory_order_acquire, this=0x38) at /usr/include/c++/10/bits/atomic_base.h:741 #5 std::atomic<QThreadData*>::load (__m=std::memory_order_acquire, this=0x38) at /usr/include/c++/10/atomic:523 #6 QAtomicOps<QThreadData*>::loadAcquire<QThreadData*> (_q_value=...) at ../../include/QtCore/../../src/corelib/thread/qatomic_cxx11.h:251 #7 QBasicAtomicPointer<QThreadData>::loadAcquire (this=0x38) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:255 #8 QBasicAtomicPointer<QThreadData>::operator QThreadData* (this=0x38) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:251 #9 QObjectPrivate::setParent_helper (this=0x55d37a54ef00, o=0x55d37a54ed20) at kernel/qobject.cpp:2157 #10 0x00007fc30b0784ff in KWinOptionsSettings::KWinOptionsSettings (this=<optimized out>, parent=<optimized out>, this=<optimized out>, parent=<optimized out>) at /usr/src/debug/kwin5-5.19.0-1.1.x86_64/build/kcmkwin/kwinoptions/kwinoptions_settings.cpp:9 #11 0x00007fc30b075d94 in KFocusConfigStandalone::KFocusConfigStandalone (parent=0x55d37a557640, this=0x55d37a54ed20) at /usr/src/debug/kwin5-5.19.0-1.1.x86_64/kcmkwin/kwinoptions/main.cpp:44 #12 KPluginFactory::createInstance<KFocusConfigStandalone, QWidget> (parentWidget=<optimized out>, parent=<optimized out>, args=...) at /usr/include/KF5/KCoreAddons/kpluginfactory.h:520 #13 0x00007fc322646c72 in KPluginFactory::create (this=this@entry=0x55d37a3db2c0, iface=0x7fc320d09218 "KCModule", parentWidget=parentWidget@entry=0x0, parent=parent@entry=0x55d37a557640, args=..., keyword=...) at /usr/src/debug/kcoreaddons-5.70.0-1.2.x86_64/src/lib/plugin/kpluginfactory.cpp:133 #14 0x00007fc322965564 in KPluginFactory::create<KCModule> (parentWidget=0x0, args=..., keyword=..., parent=0x55d37a557640, this=0x55d37a3db2c0) at /usr/include/KF5/KCoreAddons/kpluginfactory.h:567 #15 KService::createInstance<KCModule> (parentWidget=0x0, error=0x7fff54b93490, args=..., parent=0x55d37a557640, this=0x55d37a1a8f10) at /usr/include/KF5/KService/kservice.h:557 #16 KService::createInstance<KCModule> (error=0x7fff54b93490, args=..., parent=0x55d37a557640, this=0x55d37a1a8f10) at /usr/include/KF5/KService/kservice.h:532 #17 KCModuleLoader::loadModule (mod=..., report=report@entry=KCModuleLoader::Inline, parent=0x55d37a557640, args=...) at /usr/src/debug/kcmutils-5.70.0-2.1.x86_64/src/kcmoduleloader.cpp:118 #18 0x00007fc322965fc4 in KCModuleProxyPrivate::loadModule (this=this@entry=0x55d37a557840) at /usr/src/debug/kcmutils-5.70.0-2.1.x86_64/src/kcmoduleproxy.cpp:94 #19 0x00007fc322966658 in KCModuleProxy::realModule (this=this@entry=0x55d37a557640) at /usr/src/debug/kcmutils-5.70.0-2.1.x86_64/src/kcmoduleproxy.cpp:67 #20 0x00007fc322966ae2 in KCMultiDialog::addModule (this=0x7fc30c008160, moduleInfo=..., parentItem=0x0, args=...) at /usr/src/debug/kcmutils-5.70.0-2.1.x86_64/src/kcmultidialog.cpp:496 #21 0x000055d3798c9ee0 in main (_argc=<optimized out>, _argv=<optimized out>) at /usr/include/qt5/QtCore/qbasicatomic.h:118 [Inferior 1 (process 7859) detached]
Relevant full line called from kwin crashes: kcmshell5 --icon preferences-system-windows --desktopfile /opt/kde5/share/kservices5/kwinfocus.desktop kwindecoration kwinactions kwinfocus kwinmoving kwinadvanced kwinrules kwincompositing kwineffects kwintabbox kwinscreenedges kwinscripts
Minimal reproducible case: kcmshell5 kwinoptions kwinfocus both work on their own..or with the order flipped
Aha! found it. class KFocusConfigStandalone : public KFocusConfig { Q_OBJECT public: KFocusConfigStandalone(QWidget* parent, const QVariantList &) : KFocusConfig(true, new KWinOptionsSettings(this), parent) { } }; The problem is KWinOptionsSettings(this) uses "this", before we've called the QObject superclass constructor on "this"
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/64
Git commit 396a9da557c8825cc6de2ca9cfd26babf6a9a5b0 by Méven Car. Committed on 18/06/2020 at 10:15. Pushed by meven into branch 'Plasma/5.19'. KCMoptions: delay initialization after QObject creation in standalone FIXED-IN: 5.19.2 M +12 -6 kcmkwin/kwinoptions/main.cpp M +16 -2 kcmkwin/kwinoptions/mouse.cpp M +2 -0 kcmkwin/kwinoptions/mouse.h M +27 -5 kcmkwin/kwinoptions/windows.cpp M +4 -1 kcmkwin/kwinoptions/windows.h https://invent.kde.org/plasma/kwin/commit/396a9da557c8825cc6de2ca9cfd26babf6a9a5b0
*** Bug 423289 has been marked as a duplicate of this bug. ***
*** Bug 422840 has been marked as a duplicate of this bug. ***