Whenever running kinfocenter from command line with any of the four available switches (-v -h --author --license) or any unrecognized switch, kinfocenter successfully processes that switch, but segfaults on exit.

Interestingly, when gdb catches the SIGSEGV, there is a window for kinfocenter alive.

This may be related to bug #347344.

$ gdb /usr/bin/kinfocenter 
GNU gdb (Gentoo 7.7.1 p1) 7.7.1
[…]
This GDB was configured as "x86_64-pc-linux-gnu".
[…]
Reading symbols from /usr/bin/kinfocenter...done.
(gdb) run -v
Starting program: /usr/bin/kinfocenter -v
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7fffe7a32700 (LWP 4305)]
QObject::connect: No such signal QAction::triggered(Qt::MouseButtons,Qt::KeyboardModifiers)
QObject::connect:  (sender name:   'search')
kinfocenter 

Program received signal SIGSEGV, Segmentation fault.
Breeze::StyleConfigData::self () at /var/tmp/portage/kde-plasma/breeze-5.4.0/work/breeze-5.4.0-kf5/kstyle/breezestyleconfigdata.cpp:25
25      /var/tmp/portage/kde-plasma/breeze-5.4.0/work/breeze-5.4.0-kf5/kstyle/breezestyleconfigdata.cpp: No such file or directory.
(gdb) bt
#0  Breeze::StyleConfigData::self () at /var/tmp/portage/kde-plasma/breeze-5.4.0/work/breeze-5.4.0-kf5/kstyle/breezestyleconfigdata.cpp:25
#1  0x00007fffe56f02fc in Breeze::Style::Style (this=0x7b43f0) at /var/tmp/portage/kde-plasma/breeze-5.4.0/work/breeze-5.4.0/kstyle/breezestyle.cpp:163
#2  0x00007fffe56fb22b in Breeze::StylePlugin::create (this=0x86d980, key=...)
    at /var/tmp/portage/kde-plasma/breeze-5.4.0/work/breeze-5.4.0/kstyle/breezestyleplugin.cpp:38
#3  0x00007ffff6343e1b in qLoadPlugin<QStyle, QStylePlugin> (loader=0x7ffff67c0830 <(anonymous namespace)::Q_QGS_loader::innerFunction()::holder>, key=...)
    at /usr/include/qt5/QtCore/5.5.0/QtCore/private/qfactoryloader_p.h:92
#4  0x00007ffff6343a55 in QStyleFactory::create (key=...) at styles/qstylefactory.cpp:163
#5  0x00007ffff6369e30 in QProxyStylePrivate::ensureBaseStyle (this=this@entry=0x6c8070) at styles/qproxystyle.cpp:93
#6  0x00007ffff636a9c2 in QProxyStyle::event (this=<optimized out>, e=0x7fffffffcd60) at styles/qproxystyle.cpp:380
#7  0x00007ffff62df689 in QApplicationPrivate::notify_helper (this=this@entry=0x623050, receiver=receiver@entry=0x833d70, e=e@entry=0x7fffffffcd60)
    at kernel/qapplication.cpp:3717
#8  0x00007ffff62e44fc in QApplication::notify (this=0x7fffffffd500, receiver=0x833d70, e=0x7fffffffcd60) at kernel/qapplication.cpp:3161
#9  0x00007ffff5ad279b in QCoreApplication::notifyInternal (this=0x7fffffffd500, receiver=0x833d70, event=event@entry=0x7fffffffcd60)
    at kernel/qcoreapplication.cpp:965
#10 0x00007ffff5b01ad9 in sendEvent (event=0x7fffffffcd60, receiver=<optimized out>) at kernel/qcoreapplication.h:224
#11 QObjectPrivate::setParent_helper (this=this@entry=0x8057c0, o=o@entry=0x0) at kernel/qobject.cpp:1977
#12 0x00007ffff5b022cc in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1038
#13 0x00007ffff6342151 in QStyle::~QStyle (this=<optimized out>, __in_chrg=<optimized out>) at styles/qstyle.cpp:413
#14 0x00007ffff63484d3 in QCommonStyle::~QCommonStyle (this=<optimized out>, __in_chrg=<optimized out>) at styles/qcommonstyle.cpp:123
#15 0x00007fffe54add8d in KStyle::~KStyle (this=0x805730, __in_chrg=<optimized out>)
    at /var/tmp/portage/kde-frameworks/frameworkintegration-5.13.0/work/frameworkintegration-5.13.0/src/kstyle/kstyle.cpp:191
#16 0x00007fffe56ee942 in Breeze::Style::~Style (this=0x805730, __in_chrg=<optimized out>)
    at /var/tmp/portage/kde-plasma/breeze-5.4.0/work/breeze-5.4.0/kstyle/breezestyle.cpp:201
#17 0x00007fffe56ee959 in Breeze::Style::~Style (this=0x805730, __in_chrg=<optimized out>)
    at /var/tmp/portage/kde-plasma/breeze-5.4.0/work/breeze-5.4.0/kstyle/breezestyle.cpp:206
#18 0x00007fffe56fb121 in operator() (__closure=<synthetic pointer>)
    at /var/tmp/portage/kde-plasma/breeze-5.4.0/work/breeze-5.4.0/kstyle/breezestyleplugin.cpp:43
#19 call (arg=<optimized out>, f=...) at /usr/include/qt5/QtCore/qobjectdefs_impl.h:495
#20 call<QtPrivate::List<>, void> (arg=<optimized out>, f=...) at /usr/include/qt5/QtCore/qobjectdefs_impl.h:552
#21 QtPrivate::QFunctorSlotObject<Breeze::StylePlugin::create(const QString&)::__lambda1, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=<optimized out>, r=<optimized out>, a=<optimized out>, ret=<optimized out>)
    at /usr/include/qt5/QtCore/qobject_impl.h:192
#22 0x00007ffff5afb5fa in call (a=<optimized out>, r=0x805730, this=0x878ef0) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#23 QMetaObject::activate (sender=sender@entry=0x659190, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, 
    argv=argv@entry=0x7fffffffd030) at kernel/qobject.cpp:3703
#24 0x00007ffff5afbb46 in QMetaObject::activate (sender=sender@entry=0x659190, m=m@entry=0x7ffff5cf6a00 <QObject::staticMetaObject>, 
    local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffffffd030) at kernel/qobject.cpp:3583
#25 0x00007ffff5afbbd5 in QObject::destroyed (this=this@entry=0x659190, _t1=_t1@entry=0x659190) at .moc/moc_qobject.cpp:211
#26 0x00007ffff5b01d47 in QObject::~QObject (this=0x659190, __in_chrg=<optimized out>) at kernel/qobject.cpp:904
#27 0x00007ffff634542d in QStylePlugin::~QStylePlugin (this=<optimized out>, __in_chrg=<optimized out>) at styles/qstyleplugin.cpp:97
#28 0x00007fffe56fb141 in Breeze::StylePlugin::~StylePlugin (this=<optimized out>, __in_chrg=<optimized out>)
    at /var/tmp/portage/kde-plasma/breeze-5.4.0/work/breeze-5.4.0/kstyle/breezestyleplugin.cpp:52
#29 0x00007fffe56fb155 in Breeze::StylePlugin::~StylePlugin (this=0x659190, __in_chrg=<optimized out>)
    at /var/tmp/portage/kde-plasma/breeze-5.4.0/work/breeze-5.4.0/kstyle/breezestyleplugin.cpp:54
#30 0x00007ffff5acb309 in QLibraryPrivate::unload (this=this@entry=0x65c150, flag=flag@entry=QLibraryPrivate::UnloadSys) at plugin/qlibrary.cpp:553
#31 0x00007ffff5ac55bb in QFactoryLoaderPrivate::~QFactoryLoaderPrivate (this=0x659090, __in_chrg=<optimized out>) at plugin/qfactoryloader.cpp:88
#32 0x00007ffff5ac56f3 in QFactoryLoaderPrivate::~QFactoryLoaderPrivate (this=0x659090, __in_chrg=<optimized out>) at plugin/qfactoryloader.cpp:91
#33 0x00007ffff5b022df in cleanup (pointer=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:54
#34 ~QScopedPointer (this=0x7ffff67c0838 <(anonymous namespace)::Q_QGS_loader::innerFunction()::holder+8>, __in_chrg=<optimized out>)
    at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:101
#35 QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:883
#36 0x00007ffff5ac7cfc in QFactoryLoader::~QFactoryLoader (this=0x7ffff67c0830 <(anonymous namespace)::Q_QGS_loader::innerFunction()::holder>, 
    __in_chrg=<optimized out>) at plugin/qfactoryloader.cpp:226
#37 0x00007ffff6343dc5 in (anonymous namespace)::Q_QGS_loader::Holder::~Holder (this=<optimized out>, __in_chrg=<optimized out>) at styles/qstylefactory.cpp:70
#38 0x00007ffff6343dc5 in operator() (this=<optimized out>) from /usr/lib64/libQt5Widgets.so.5
#39 (anonymous namespace)::Q_QGS_loader::innerFunction()::Holder::~Holder() () at styles/qstylefactory.cpp:163
#40 0x00007ffff522eb99 in ?? () from /lib64/libc.so.6
#41 0x00007ffff522ebe5 in exit () from /lib64/libc.so.6
#42 0x00007ffff5948698 in QCommandLineParser::showVersion (this=this@entry=0x7fffffffd4e0) at tools/qcommandlineparser.cpp:945
#43 0x00007ffff594c2e1 in QCommandLineParser::process (this=this@entry=0x7fffffffd4e0, arguments=...) at tools/qcommandlineparser.cpp:541
#44 0x00007ffff594c3f1 in QCommandLineParser::process (this=this@entry=0x7fffffffd4e0, app=...) at tools/qcommandlineparser.cpp:556
#45 0x0000000000415c34 in main (argc=2, argv=0x7fffffffd648) at /var/tmp/portage/kde-plasma/kinfocenter-5.4.0/work/kinfocenter-5.4.0/main.cpp:69


Reproducible: Always

Steps to Reproduce:
1. run from command line kinfocenter -v


Actual Results:  
crash, kinfocenter window opens

Expected Results:  
no crash, no window