D24594: [aurorae] Fix crash on KCM teardown with Qt5.14

Sat Oct 12 16:20:20 BST 2019

davidedmundson added a comment.

  Relevant BT:

    #0  KCrash::defaultCrashHandler (sig=11) at /home/david/projects/kde5/src/frameworks/kcrash/src/kcrash.cpp:423
    #1  <signal handler called>
    #2  QScopedPointer<KDecoration2::Decoration::Private, QScopedPointerDeleter<KDecoration2::Decoration::Private> >::operator-> (this=0x10)
        at /opt/qt5/include/QtCore/qscopedpointer.h:118
    #3  0x00007fffec8e5f57 in KDecoration2::Decoration::client (this=0x0) at /home/david/projects/kde5/src/kde/workspace/kdecoration/src/decoration.cpp:163
    #4  0x00007fffdaaea9e2 in KWin::DecorationOptions::setDecoration (this=0x555555d59e10, decoration=0x0)
        at /home/david/projects/kde5/src/kde/workspace/kwin/plugins/kdecorations/aurorae/src/decorationoptions.cpp:178
    #5  0x00007fffdaae53ae in KWin::DecorationOptions::qt_static_metacall (_o=0x555555d59e10, _c=QMetaObject::WriteProperty, _id=0, _a=0x7fffffffaf20)
        at plugins/kdecorations/aurorae/src/decorationplugin_autogen/EWIEGA46WW/moc_decorationoptions.cpp:274
    #6  0x00007ffff72f68d3 in QQmlPropertyData::writeProperty (this=0x7fffd401adc8, target=0x555555d59e10, value=0x7fffffffaf98, flags=...)
        at ../../include/QtQml/5.14.0/QtQml/private/../../../../../../../qt5/qtdeclarative/src/qml/qml/qqmlpropertydata_p.h:286
    #7  0x00007ffff7370bae in QObjectPointerBinding::write (this=0x555555d6a6f0, result=..., isUndefined=false, flags=...)
        at /home/david/projects/qt5/qtdeclarative/src/qml/qml/qqmlbinding.cpp:697
    #8  0x00007ffff7370365 in QQmlNonbindingBinding::doUpdate (this=0x555555d6a6f0, watcher=..., flags=..., scope=...)
        at /home/david/projects/qt5/qtdeclarative/src/qml/qml/qqmlbinding.cpp:250
    #9  0x00007ffff736e07d in QQmlBinding::update (this=0x555555d6a6f0, flags=...) at /home/david/projects/qt5/qtdeclarative/src/qml/qml/qqmlbinding.cpp:186
    #10 0x00007ffff736f0cd in QQmlBinding::expressionChanged (this=0x555555d6a6f0) at /home/david/projects/qt5/qtdeclarative/src/qml/qml/qqmlbinding.cpp:531
    #11 0x00007ffff7366931 in QQmlJavaScriptExpressionGuard_callback (e=0x555555c62e78) at /home/david/projects/qt5/qtdeclarative/src/qml/qml/qqmljavascriptexpression.cpp:417
    #12 0x00007ffff73451c6 in QQmlNotifier::emitNotify (endpoint=0x0, a=0x0) at /home/david/projects/qt5/qtdeclarative/src/qml/qml/qqmlnotifier.cpp:104
    #13 0x00007ffff72dce16 in QQmlData::signalEmitted (object=0x555555d60f50, index=3, a=0x0) at /home/david/projects/qt5/qtdeclarative/src/qml/qml/qqmlengine.cpp:858
    #14 0x00007ffff4fbeef6 in doActivate<false> (sender=0x555555d60f50, signal_index=3, argv=0x0) at /home/david/projects/qt5/qtbase/src/corelib/kernel/qobject.cpp:3762
    #15 0x00007ffff4fb8e8f in QMetaObject::activate (sender=0x555555d60f50, signalOffset=3, local_signal_index=0, argv=0x0)
        at /home/david/projects/qt5/qtbase/src/corelib/kernel/qobject.cpp:3943
    #16 0x00007ffff7302244 in QQmlContextPrivate::dropDestroyedQObject (this=0x555555d5cef0, name=..., destroyed=0x555555d6ff10)
        at /home/david/projects/qt5/qtdeclarative/src/qml/qml/qqmlcontext.cpp:541
    #17 0x00007ffff73013d1 in QQmlContext::<lambda(QObject*)>::operator()(QObject *) const (__closure=0x555555d6f4e0, destroyed=0x555555d6ff10)
        at /home/david/projects/qt5/qtdeclarative/src/qml/qml/qqmlcontext.cpp:323
    #18 0x00007ffff7303b71 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<QObject*>, void, QQmlContext::setContextProperty(const QString&, const QVariant&)::<lambda(QObject*)> >::call(QQmlContext::<lambda(QObject*)> &, void **) (f=..., arg=0x7fffffffcee0)
        at /home/david/projects/qt5-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:146
    #19 0x00007ffff7303b32 in QtPrivate::Functor<QQmlContext::setContextProperty(const QString&, const QVariant&)::<lambda(QObject*)>, 1>::call<QtPrivate::List<QObject*>, void>(QQmlContext::<lambda(QObject*)> &, void *, void **) (f=..., arg=0x7fffffffcee0)
        at /home/david/projects/qt5-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:256
    #20 0x00007ffff7303b00 in QtPrivate::QFunctorSlotObject<QQmlContext::setContextProperty(const QString&, const QVariant&)::<lambda(QObject*)>, 1, QtPrivate::List<QObject*>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=1, this_=0x555555d6f4d0, r=0x555555d60f50, a=0x7fffffffcee0, ret=0x0)
        at /home/david/projects/qt5-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:439
    --Type <RET> for more, q to quit, c to continue without paging--
    #21 0x00007ffff4f7dbb1 in QtPrivate::QSlotObjectBase::call (this=0x555555d6f4d0, r=0x555555d60f50, a=0x7fffffffcee0)
        at ../../include/QtCore/../../../../qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:394
    #22 0x00007ffff4fbf440 in doActivate<false> (sender=0x555555d6ff10, signal_index=0, argv=0x7fffffffcee0) at /home/david/projects/qt5/qtbase/src/corelib/kernel/qobject.cpp:3870
    #23 0x00007ffff4fb8e1d in QMetaObject::activate (sender=0x555555d6ff10, m=0x7ffff5341c20 <QObject::staticMetaObject>, local_signal_index=0, argv=0x7fffffffcee0)
        at /home/david/projects/qt5/qtbase/src/corelib/kernel/qobject.cpp:3930
    #24 0x00007ffff4fbbcb2 in QObject::destroyed (this=0x555555d6ff10, _t1=0x555555d6ff10) at .moc/moc_qobject.cpp:219
    #25 0x00007ffff4fb1c2c in QObject::~QObject (this=0x555555d6ff10, __in_chrg=<optimized out>) at /home/david/projects/qt5/qtbase/src/corelib/kernel/qobject.cpp:1017
    #26 0x00007fffec8e5ebd in KDecoration2::Decoration::~Decoration (this=0x555555d6ff10) at /home/david/projects/kde5/src/kde/workspace/kdecoration/src/decoration.cpp:154
    #27 0x00007fffdbd61d4c in Aurorae::Decoration::~Decoration (this=0x555555d6ff10)
        at /home/david/projects/kde5/src/kde/workspace/kwin/plugins/kdecorations/aurorae/src/aurorae.cpp:280
    #28 0x00007fffdbd61d79 in Aurorae::Decoration::~Decoration (this=0x555555d6ff10)
        at /home/david/projects/kde5/src/kde/workspace/kwin/plugins/kdecorations/aurorae/src/aurorae.cpp:268
    #29 0x00007ffff4fba887 in qDeleteInEventHandler (o=0x555555d6ff10) at /home/david/projects/qt5/qtbase/src/corelib/kernel/qobject.cpp:4784
    #30 0x00007ffff4fb2464 in QObject::event (this=0x555555d6ff10, e=0x5555556a5a00) at /home/david/projects/qt5/qtbase/src/corelib/kernel/qobject.cpp:1326
    #31 0x00007fffec8e6e5d in KDecoration2::Decoration::event (this=0x555555d6ff10, event=0x5555556a5a00)
        at /home/david/projects/kde5/src/kde/workspace/kdecoration/src/decoration.cpp:306
    #32 0x00007ffff5d59315 in QApplicationPrivate::notify_helper (this=0x55555557da10, receiver=0x555555d6ff10, e=0x5555556a5a00)
        at /home/david/projects/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3690
    #33 0x00007ffff5d56669 in QApplication::notify (this=0x7fffffffdf78, receiver=0x555555d6ff10, e=0x5555556a5a00)
        at /home/david/projects/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3036
    #34 0x00007ffff4f6bc5f in QCoreApplication::notifyInternal2 (receiver=0x555555d6ff10, event=0x5555556a5a00)
        at /home/david/projects/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1092
    #35 0x00007ffff4f6c66c in QCoreApplication::sendEvent (receiver=0x555555d6ff10, event=0x5555556a5a00)
        at /home/david/projects/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1487
    #36 0x00007ffff4f6d28e in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x555555574630)
        at /home/david/projects/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1832
    #37 0x00007ffff4f6cbda in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=52) at /home/david/projects/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1691
    #38 0x00007ffff4f6c59d in QCoreApplicationPrivate::execCleanup (this=0x55555557da10) at /home/david/projects/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1422
    #39 0x00007ffff4f6c4f2 in QCoreApplication::exec () at /home/david/projects/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1404
    #40 0x00007ffff54a17e0 in QGuiApplication::exec () at /home/david/projects/qt5/qtbase/src/gui/kernel/qguiapplication.cpp:1845
    #41 0x00007ffff5d55e9f in QApplication::exec () at /home/david/projects/qt5/qtbase/src/widgets/kernel/qapplication.cpp:2836
    #42 0x00007ffff7fb9b81 in kdemain (_argc=2, _argv=0x7fffffffe0a8) at /home/david/projects/kde5/src/kde/workspace/kde-cli-tools/kcmshell/main.cpp:328
    #43 0x0000555555555192 in main (argc=2, argv=0x7fffffffe0a8) at kcmshell/kcmshell5_dummy.cpp:3

    (gdb) frame 9

    (gdb) print this->expressionIdentifier()   
    (Qt5 QString)0xffffa2d0 length=52: "file:///opt/kde5/share/kwin/aurorae/aurorae.qml:41:9"

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D24594

To: davidedmundson, #kwin
Cc: kwin, LeGast00n, The-Feren-OS-Dev, sbergeron, jraleigh, fbampaloukas, GB_2, mkulinski, ragreen, jackyalcine, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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