Bug 407631 - Clicking "Other user" button crashes sddm
Summary: Clicking "Other user" button crashes sddm
Status: RESOLVED UPSTREAM
Alias: None
Product: plasmashell
Classification: Plasma
Component: Theme - Breeze (show other bugs)
Version: 5.15.90
Platform: Other Linux
: NOR crash
Target Milestone: 1.0
Assignee: visual-design
URL:
Keywords:
: 407531 407769 (view as bug list)
Depends on:
Blocks:
 
Reported: 2019-05-17 07:30 UTC by Antonio Rojas
Modified: 2019-05-20 15:35 UTC (History)
7 users (show)

See Also:
Latest Commit:
Version Fixed In:

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Description Antonio Rojas 2019-05-17 07:30:14 UTC 
SUMMARY
Clicking the new "other user" button in the Breeze SDDM theme makes sddm_greeter crash

Plasma 5.15.90, Qt 5.13 beta

(gdb) bt
#0  QQmlPropertyRawData::coreIndex (this=0x0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/qml/qqmlpropertycache_p.h:214
#1  QV4::QObjectWrapper::getProperty (engine=engine@entry=0x55f291dd73c0, object=object@entry=0x55f2937f3260, property=0x0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4qobjectwrapper.cpp:238
#2  0x00007f41b914e568 in QV4::QObjectWrapper::virtualResolveLookupGetter (object=0x7f41b02bb9c0, engine=0x55f291dd73c0, lookup=0x55f292203a70)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4qobjectwrapper.cpp:859
#3  0x00007f41b90a5df5 in QV4::Object::resolveLookupGetter (lookup=<optimized out>, engine=<optimized out>, this=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/memory/qv4heap_p.h:82
#4  QV4::Lookup::resolveGetter (this=<optimized out>, engine=<optimized out>, object=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4lookup.cpp:72
#5  0x00007f41b90a634d in QV4::Lookup::getterGeneric (l=<optimized out>, engine=<optimized out>, object=...)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4lookup.cpp:138
#6  0x00007f41b9143a34 in QV4::QObjectWrapper::<lambda()>::operator()(void) const (__closure=0x7ffef2d4f240)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4qobjectwrapper.cpp:887
#7  0x00007f41b914d929 in QV4::QObjectWrapper::lookupGetterImpl<QV4::QObjectWrapper::lookupGetter(QV4::Lookup*, QV4::ExecutionEngine*, const QV4::Value&)::<lambda()> > (revertLookup=..., useOriginalProperty=false, object=..., engine=0x55f291dd73c0, lookup=0x55f292203a70)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4qobjectwrapper.cpp:887
#8  QV4::QObjectWrapper::lookupGetter (lookup=0x55f292203a70, engine=0x55f291dd73c0, object=...)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4qobjectwrapper.cpp:890
#9  0x00007f41b916ae69 in QV4::Moth::VME::interpret (frame=frame@entry=0x7ffef2d4f420, engine=engine@entry=0x55f291dd73c0, 
    code=0x7f41a08902a6 <error: Cannot access memory at address 0x7f41a08902a6>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:701
#10 0x00007f41b9171e41 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffef2d4f420, engine=engine@entry=0x55f291dd73c0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:505
#11 0x00007f41b90d9a25 in QV4::Function::call (this=this@entry=0x55f292204680, thisObject=thisObject@entry=0x7f41b02bb998, 
--Type <RET> for more, q to quit, c to continue without paging--
    argv=argv@entry=0x7f41b02bb9b0, argc=<optimized out>, context=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4function.cpp:69
#12 0x00007f41b92aaeea in QQmlJavaScriptExpression::evaluate (this=this@entry=0x55f293800940, callData=callData@entry=0x7f41b02bb980, 
    isUndefined=isUndefined@entry=0x7ffef2d4f61f)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/jsruntime/qv4value_p.h:177
#13 0x00007f41b92b17bf in QQmlBinding::evaluate (this=this@entry=0x55f293800940, isUndefined=isUndefined@entry=0x7ffef2d4f61f)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/jsruntime/qv4jscall_p.h:95
#14 0x00007f41b92b86b3 in QQmlNonbindingBinding::doUpdate (this=0x55f293800940, watcher=..., flags=..., scope=...)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlbinding.cpp:245
#15 0x00007f41b92b5294 in QQmlBinding::update (this=this@entry=0x55f293800940, flags=flags@entry=...)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlbinding.cpp:185
#16 0x00007f41b92b61a1 in QQmlBinding::setEnabled (this=0x55f293800940, e=<optimized out>, flags=...)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlbinding.cpp:551
#17 0x00007f41b92c82e0 in QQmlObjectCreator::finalize (this=0x55f293797430, interrupt=...) at /usr/include/qt/QtCore/qshareddata.h:158
#18 0x00007f41b92454d7 in QQmlIncubatorPrivate::incubate (this=this@entry=0x55f2937fffa0, i=...) at /usr/include/qt/QtCore/qscopedpointer.h:116
#19 0x00007f41b9245a99 in QQmlEnginePrivate::incubate (this=this@entry=0x55f2920f26b0, i=..., forContext=forContext@entry=0x55f2936bcf50)
    at /usr/include/qt/QtCore/qshareddata.h:158
#20 0x00007f41b923cf68 in QQmlComponentPrivate::incubateObject (this=this@entry=0x55f2934ca390, incubationTask=0x55f2937e99c0, 
    component=component@entry=0x55f2921ee220, engine=<optimized out>, context=context@entry=0x55f293800080, forContext=forContext@entry=0x55f2936bcf50)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlcomponent.cpp:1084
#21 0x00007f41b933ccf1 in QQmlDelegateModelPrivate::object (this=this@entry=0x55f2936b8650, group=QQmlListCompositor::Default, index=index@entry=0, 
    incubationMode=incubationMode@entry=QQmlIncubator::AsynchronousIfNested) at /usr/include/c++/8.3.0/bits/atomic_base.h:390
#22 0x00007f41b933cf30 in QQmlDelegateModel::object (this=<optimized out>, index=0, incubationMode=QQmlIncubator::AsynchronousIfNested)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/types/qqmldelegatemodel.cpp:1114
#23 0x00007f41b98e5c02 in QQuickItemViewPrivate::createItem (this=this@entry=0x55f2936b7610, modelIndex=modelIndex@entry=0, 
--Type <RET> for more, q to quit, c to continue without paging--
    incubationMode=incubationMode@entry=QQmlIncubator::AsynchronousIfNested) at /usr/include/c++/8.3.0/bits/atomic_base.h:390
#24 0x00007f41b98f5f03 in QQuickListViewPrivate::addVisibleItems (this=0x55f2936b7610, fillFrom=-0, fillTo=0, bufferFrom=<optimized out>, bufferTo=320, 
    doBuffer=false) at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquicklistview.cpp:696
#25 0x00007f41b98e6f79 in QQuickItemViewPrivate::refill (this=this@entry=0x55f2936b7610, from=<optimized out>, to=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquickitemview.cpp:1745
#26 0x00007f41b98e7288 in QQuickItemViewPrivate::refill (this=this@entry=0x55f2936b7610)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquickitemview.cpp:1721
#27 0x00007f41b98eb2c9 in QQuickItemView::componentComplete (this=0x55f2936bd010)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquickitemview.cpp:1448
#28 0x00007f41b92c863f in QQmlObjectCreator::finalize (this=0x55f2936bb720, interrupt=...)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlobjectcreator.cpp:1396
#29 0x00007f41b923de8b in QQmlComponentPrivate::complete (enginePriv=0x55f2920f26b0, state=state@entry=0x55f2920a4450)
    at /usr/include/qt/QtCore/qscopedpointer.h:116
#30 0x00007f41b923dfb1 in QQmlComponentPrivate::completeCreate (this=this@entry=0x55f2920a43b0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlcomponent.cpp:959
#31 0x00007f41b9240e8d in QQmlComponent::createObject (this=<optimized out>, args=0x7ffef2d50050)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlcomponent.cpp:1311
#32 0x00007f41b9242bec in QQmlComponent::qt_static_metacall (_o=_o@entry=0x55f292098850, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=6, 
    _a=_a@entry=0x7ffef2d500b0) at .moc/moc_qqmlcomponent.cpp:150
#33 0x00007f41b9242d59 in QQmlComponent::qt_metacall (this=0x55f292098850, _c=QMetaObject::InvokeMetaMethod, _id=6, _a=0x7ffef2d500b0)
    at .moc/moc_qqmlcomponent.cpp:218
#34 0x00007f41b927e499 in QQmlObjectOrGadget::metacall (this=this@entry=0x7ffef2d50030, type=type@entry=QMetaObject::InvokeMetaMethod, 
    index=<optimized out>, argv=argv@entry=0x7ffef2d500b0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/qml/ftw/qflagpointer_p.h:335
#35 0x00007f41b914c05e in QV4::QObjectMethod::callInternal (this=<optimized out>, thisObject=0x7f41b02bb890, argv=0x7f41b02bb8b8, argc=2)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/qml/qqmlpropertycach--Type <RET> for more, q to quit, c to continue without paging--
e_p.h:214
#36 0x00007f41b914c09f in QV4::QObjectMethod::virtualCall (m=<optimized out>, thisObject=<optimized out>, argv=<optimized out>, argc=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4qobjectwrapper.cpp:2056
#37 0x00007f41b916bb3a in QV4::FunctionObject::call (argc=2, argv=0x7f41b02bb8b8, thisObject=0x7f41b02bb890, this=0x7ffef2d50160)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/jsruntime/qv4functionobject_p.h:172
#38 QV4::Moth::VME::interpret (frame=frame@entry=0x7ffef2d502b0, engine=engine@entry=0x55f291dd73c0, 
    code=0x7f41a081c47c <error: Cannot access memory at address 0x7f41a081c47c>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:822
#39 0x00007f41b9171e41 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffef2d502b0, engine=engine@entry=0x55f291dd73c0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:505
#40 0x00007f41b90db00b in QV4::ArrowFunction::virtualCall (fo=<optimized out>, thisObject=<optimized out>, argv=<optimized out>, argc=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4functionobject.cpp:520
#41 0x00007f41b91f27bf in QV4::FunctionObject::call (argc=1, argv=0x7f41b02bb7f8, thisObject=0x7f41b02bb848, this=0x7ffef2d50340)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4functionobject_p.h:172
#42 QV4::Runtime::method_callQmlContextPropertyLookup (engine=engine@entry=0x55f291dd73c0, index=<optimized out>, argv=0x7f41b02bb7f8, argc=1)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4runtime.cpp:1385
#43 0x00007f41b916c347 in QV4::Moth::VME::interpret (frame=frame@entry=0x7ffef2d50530, engine=engine@entry=0x55f291dd73c0, 
    code=0x7f41a081ccc4 <error: Cannot access memory at address 0x7f41a081ccc4>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:857
#44 0x00007f41b9171e41 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffef2d50530, engine=engine@entry=0x55f291dd73c0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:505
#45 0x00007f41b90db00b in QV4::ArrowFunction::virtualCall (fo=<optimized out>, thisObject=<optimized out>, argv=<optimized out>, argc=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4functionobject.cpp:520
#46 0x00007f41b91f27bf in QV4::FunctionObject::call (argc=1, argv=0x7f41b02bb710, thisObject=0x7f41b02bb790, this=0x7ffef2d505c0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4functionobject_p.h:172
#47 QV4::Runtime::method_callQmlContextPropertyLookup (engine=engine@entry=0x55f291dd73c0, index=<optimized out>, argv=0x7f41b02bb710, argc=1)
--Type <RET> for more, q to quit, c to continue without paging--
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4runtime.cpp:1385
#48 0x00007f41b916c347 in QV4::Moth::VME::interpret (frame=frame@entry=0x7ffef2d507b0, engine=engine@entry=0x55f291dd73c0, 
    code=0x7f41a081ba4a <error: Cannot access memory at address 0x7f41a081ba4a>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:857
#49 0x00007f41b9171e41 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffef2d507b0, engine=engine@entry=0x55f291dd73c0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:505
#50 0x00007f41b90db00b in QV4::ArrowFunction::virtualCall (fo=<optimized out>, thisObject=<optimized out>, argv=<optimized out>, argc=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4functionobject.cpp:520
#51 0x00007f41b916bb3a in QV4::FunctionObject::call (argc=1, argv=0x7f41b02bb650, thisObject=0x7f41b02bb638, this=0x7ffef2d50880)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/jsruntime/qv4functionobject_p.h:172
#52 QV4::Moth::VME::interpret (frame=frame@entry=0x7ffef2d509d0, engine=engine@entry=0x55f291dd73c0, 
    code=0x7f41b07fc56b <error: Cannot access memory at address 0x7f41b07fc56b>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:822
#53 0x00007f41b9171e41 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffef2d509d0, engine=engine@entry=0x55f291dd73c0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:505
#54 0x00007f41b90d9a25 in QV4::Function::call (this=this@entry=0x55f291f59260, thisObject=thisObject@entry=0x7f41b02bb5e8, 
    argv=argv@entry=0x7f41b02bb600, argc=<optimized out>, context=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4function.cpp:69
#55 0x00007f41b92aaeea in QQmlJavaScriptExpression::evaluate (this=this@entry=0x55f292081620, callData=callData@entry=0x7f41b02bb5d0, 
    isUndefined=isUndefined@entry=0x0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/jsruntime/qv4value_p.h:177
#56 0x00007f41b924b74c in QQmlBoundSignalExpression::evaluate (this=<optimized out>, a=a@entry=0x7ffef2d529b0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/jsruntime/qv4jscall_p.h:95
#57 0x00007f41b924ba1f in QQmlBoundSignal_callback (e=0x55f2920815d0, a=0x7ffef2d529b0)
--Type <RET> for more, q to quit, c to continue without paging--
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/qml/qqmlboundsignalexpressionpointer_p.h:69
#58 0x00007f41b9288f84 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x7ffef2d529b0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlnotifier.cpp:104
#59 0x00007f41b92265e7 in QQmlData::signalEmitted (object=0x55f29209c290, index=40, a=0x7ffef2d529b0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlengine.cpp:887
#60 0x00007f41b8547deb in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
#61 0x00007f41b921f159 in QQmlVMEMetaObject::activate (this=this@entry=0x55f29209ac90, object=<optimized out>, index=index@entry=57, 
    args=args@entry=0x7ffef2d529b0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/qml/qqmlpropertycache_p.h:864
#62 0x00007f41b9222857 in QQmlVMEMetaObject::metaCall (this=0x55f29209ac90, o=<optimized out>, c=QMetaObject::InvokeMetaMethod, _id=57, a=0x7ffef2d529b0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlvmemetaobject.cpp:922
#63 0x00007f41b927e499 in QQmlObjectOrGadget::metacall (this=this@entry=0x7ffef2d52c70, type=type@entry=QMetaObject::InvokeMetaMethod, 
    index=<optimized out>, index@entry=57, argv=argv@entry=0x7ffef2d529b0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/qml/ftw/qflagpointer_p.h:335
#64 0x00007f41b914b248 in CallMethod (object=..., index=57, returnType=returnType@entry=43, argCount=argCount@entry=0, argTypes=argTypes@entry=0x0, 
    engine=engine@entry=0x55f291dd73c0, callArgs=0x7f41b02bb598, callType=QMetaObject::InvokeMetaMethod)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4qobjectwrapper.cpp:1314
#65 0x00007f41b914b56e in CallPrecise (object=..., data=..., engine=engine@entry=0x55f291dd73c0, callArgs=callArgs@entry=0x7f41b02bb598, 
    callType=callType@entry=QMetaObject::InvokeMetaMethod)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/qml/qqmlpropertycache_p.h:214
#66 0x00007f41b914bd1f in QV4::QObjectMethod::callInternal (this=0x7ffef2d52da0, thisObject=0x7f41b02bb550, argv=0x7f41b02bb510, argc=0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4qobjectwrapper.cpp:2119
#67 0x00007f41b914c09f in QV4::QObjectMethod::virtualCall (m=<optimized out>, thisObject=<optimized out>, argv=<optimized out>, argc=<optimized out>)
--Type <RET> for more, q to quit, c to continue without paging--
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4qobjectwrapper.cpp:2056
#68 0x00007f41b916bb3a in QV4::FunctionObject::call (argc=0, argv=0x7f41b02bb510, thisObject=0x7f41b02bb550, this=0x7ffef2d52da0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/jsruntime/qv4functionobject_p.h:172
#69 QV4::Moth::VME::interpret (frame=frame@entry=0x7ffef2d52ef0, engine=engine@entry=0x55f291dd73c0, 
    code=0x7f41a080c377 <error: Cannot access memory at address 0x7f41a080c377>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:822
#70 0x00007f41b9171e41 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffef2d52ef0, engine=engine@entry=0x55f291dd73c0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4vme_moth.cpp:505
#71 0x00007f41b90d9a25 in QV4::Function::call (this=this@entry=0x55f29209b150, thisObject=thisObject@entry=0x7f41b02bb4f0, 
    argv=argv@entry=0x7f41b02bb508, argc=<optimized out>, context=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/jsruntime/qv4function.cpp:69
#72 0x00007f41b92aaeea in QQmlJavaScriptExpression::evaluate (this=this@entry=0x55f292039270, callData=callData@entry=0x7f41b02bb4d8, 
    isUndefined=isUndefined@entry=0x0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/jsruntime/qv4value_p.h:177
#73 0x00007f41b924b74c in QQmlBoundSignalExpression::evaluate (this=<optimized out>, a=a@entry=0x7ffef2d54c50)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/jsruntime/qv4jscall_p.h:95
#74 0x00007f41b924ba1f in QQmlBoundSignal_callback (e=0x55f292039df0, a=0x7ffef2d54c50)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/include/QtQml/5.13.0/QtQml/private/../../../../../src/qml/qml/qqmlboundsignalexpressionpointer_p.h:69
#75 0x00007f41b9288f84 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x7ffef2d54c50)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlnotifier.cpp:104
#76 0x00007f41b92265e7 in QQmlData::signalEmitted (object=0x55f292014260, index=46, a=0x7ffef2d54c50)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/qml/qml/qqmlengine.cpp:887
#77 0x00007f41b8547deb in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5
--Type <RET> for more, q to quit, c to continue without paging--
#78 0x00007f41b9886b1b in QQuickMouseArea::clicked (this=this@entry=0x55f292014260, _t1=<optimized out>, _t1@entry=0x55f292039d48)
    at .moc/moc_qquickmousearea_p.cpp:667
#79 0x00007f41b9888954 in QQuickMouseArea::setPressed (this=this@entry=0x55f292014260, button=Qt::LeftButton, p=p@entry=false, 
    source=Qt::MouseEventNotSynthesized) at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquickmousearea.cpp:1243
#80 0x00007f41b98891f5 in QQuickMouseArea::mouseReleaseEvent (this=0x55f292014260, event=0x7ffef2d551c0) at /usr/include/qt/QtGui/qevent.h:132
#81 0x00007f41b97d9206 in QQuickItem::event (this=0x55f292014260, ev=0x7ffef2d551c0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquickitem.cpp:8077
#82 0x00007f41b851d5e9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#83 0x00007f41b97f6a87 in QQuickWindowPrivate::deliverMouseEvent (this=this@entry=0x55f291da0370, pointerEvent=0x55f2936d9780)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquickwindow.cpp:1794
#84 0x00007f41b97f7af8 in QQuickWindowPrivate::deliverPointerEvent (this=this@entry=0x55f291da0370, event=0x55f2936d9780)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquickwindow.cpp:2357
#85 0x00007f41b97f8955 in QQuickWindowPrivate::handleMouseEvent (this=0x55f291da0370, event=0x7ffef2d551c0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquickwindow.cpp:2190
#86 0x00007f41b97f8c8d in QQuickWindow::mouseReleaseEvent (this=<optimized out>, event=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquickwindow.cpp:2170
#87 0x00007f41b989e4cb in QQuickView::mouseReleaseEvent (this=<optimized out>, e=<optimized out>)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquickview.cpp:620
#88 0x00007f41b88f81c5 in QWindow::event(QEvent*) () from /usr/lib/libQt5Gui.so.5
#89 0x00007f41b97f97dd in QQuickWindow::event (this=0x55f291db4d50, e=0x7ffef2d551c0)
    at /build/qt5-declarative/src/qtdeclarative-everywhere-src-5.13.0-beta3/src/quick/items/qquickwindow.cpp:1683
#90 0x00007f41b851d5e9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#91 0x00007f41b88ec5ed in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib/libQt5Gui.so.5
#92 0x00007f41b88eda16 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) ()
   from /usr/lib/libQt5Gui.so.5
#93 0x00007f41b88c723c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Gui.so.5
#94 0x00007f41b46c3b2c in ?? () from /usr/lib/libQt5XcbQpa.so.5
--Type <RET> for more, q to quit, c to continue without paging--
#95 0x00007f41b6c3490f in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#96 0x00007f41b6c36869 in ?? () from /usr/lib/libglib-2.0.so.0
#97 0x00007f41b6c368ae in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#98 0x00007f41b8572b69 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#99 0x00007f41b851c17c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#100 0x00007f41b85243e6 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#101 0x000055f2909b6d72 in main ()
Comment 1 Matej Mrenica 2019-05-17 11:11:00 UTC 
Yes, I also have this problem.
Comment 2 Patrick Silva 2019-05-17 11:29:23 UTC 
*** Bug 407531 has been marked as a duplicate of this bug. ***
Comment 3 Filip Fila 2019-05-18 15:27:13 UTC 
The changes to the button since 5.15 were cosmetic, this being the most that was done: https://phabricator.kde.org/R120:ccefa20ae859bf4ee6f0006be4e54f368ea9aed8

But just to check, does this happen with other themes? You can try the Breeze 5.14 theme in the store (there the button is still called "Different User").

Seems like a Qt 5.13 bug one way or another as the button is working fine in KDE Neon Unstable which has 5.12.
Comment 4 Antonio Rojas 2019-05-18 15:37:21 UTC 
Qt report: https://bugreports.qt.io/browse/QTBUG-75900
Comment 6 Antonio Rojas 2019-05-20 15:35:32 UTC 
*** Bug 407769 has been marked as a duplicate of this bug. ***