Continuing.

Breakpoint 2, 0x00007f82cb7b7430 in QSqlDatabase::~QSqlDatabase()@plt () from /usr/lib/qt/plugins/kactivitymanagerd/kactivitymanagerd_plugin_sqlite.so
Num     Type           Disp Enb Address            What
2       breakpoint     keep y   <MULTIPLE>         
	breakpoint already hit 5 times
2.1                         y     0x00007f82cb57f0d0 <QSqlDatabase::~QSqlDatabase()@plt>
2.2                         y     0x00007f82cb584dd0 in QSqlDatabase::~QSqlDatabase() at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:130
2.3                         y     0x00007f82cb7b7430 <QSqlDatabase::~QSqlDatabase()@plt>
3       breakpoint     keep y   <MULTIPLE>         
	breakpoint already hit 2 times
3.1                         y     0x00007f82cb57f5f0 <QSqlDatabase::close()@plt>
3.2                         y     0x00007f82cb583870 in QSqlDatabase::close() at kernel/qsqldatabase.cpp:871
  Id   Target Id         Frame 
  4    Thread 0x7f82da4b5700 (LWP 17819) "QThread" 0x00007f82f19e9e8d in poll () from /usr/lib/libc.so.6
  3    Thread 0x7f82d9cb4700 (LWP 17820) "QThread" 0x00007f82f19e9e8d in poll () from /usr/lib/libc.so.6
  2    Thread 0x7f82d94b3700 (LWP 17821) "QThread" 0x00007f82f19e9e8d in poll () from /usr/lib/libc.so.6
* 1    Thread 0x7f82f40557c0 (LWP 17817) "kactivitymanage" 0x00007f82cb7b7430 in QSqlDatabase::~QSqlDatabase()@plt () from /usr/lib/qt/plugins/kactivitymanagerd/kactivitymanagerd_plugin_sqlite.so
#0  0x00007f82cb7b7430 in QSqlDatabase::~QSqlDatabase()@plt () from /usr/lib/qt/plugins/kactivitymanagerd/kactivitymanagerd_plugin_sqlite.so
#1  0x00007f82cb7cbab2 in ~Private (this=0x199c870, __in_chrg=<optimized out>) at /shared/src/kactivities-5.12.0/src/common/database/Database.cpp:40
#2  operator() (this=<optimized out>, __ptr=0x199c870) at /usr/include/c++/5.2.0/bits/unique_ptr.h:76
#3  ~unique_ptr (this=<optimized out>, __in_chrg=<optimized out>) at /usr/include/c++/5.2.0/bits/unique_ptr.h:236
#4  ~d_ptr (this=<optimized out>, __in_chrg=<optimized out>) at /shared/src/kactivities-5.12.0/src/utils/d_ptr_implementation.h:44
#5  ~Database (this=<optimized out>, __in_chrg=<optimized out>) at /shared/src/kactivities-5.12.0/src/common/database/Database.cpp:180
#6  destroy<Common::Database> (this=<optimized out>, __p=<optimized out>) at /usr/include/c++/5.2.0/ext/new_allocator.h:124
#7  _S_destroy<Common::Database> (__p=<optimized out>, __a=...) at /usr/include/c++/5.2.0/bits/alloc_traits.h:285
#8  destroy<Common::Database> (__a=..., __p=<optimized out>) at /usr/include/c++/5.2.0/bits/alloc_traits.h:414
#9  std::_Sp_counted_ptr_inplace<Common::Database, std::allocator<Common::Database>, (__gnu_cxx::_Lock_policy)2>::_M_dispose (this=<optimized out>) at /usr/include/c++/5.2.0/bits/shared_ptr_base.h:531
#10 0x00007f82cb7b7de5 in _M_release (this=0x19b8290) at /usr/include/c++/5.2.0/bits/shared_ptr_base.h:150
#11 ~__shared_count (this=0x199ef08, __in_chrg=<optimized out>) at /usr/include/c++/5.2.0/bits/shared_ptr_base.h:659
#12 ~__shared_ptr (this=0x199ef00, __in_chrg=<optimized out>) at /usr/include/c++/5.2.0/bits/shared_ptr_base.h:925
#13 ~shared_ptr (this=0x199ef00, __in_chrg=<optimized out>) at /usr/include/c++/5.2.0/bits/shared_ptr.h:93
#14 ~Private (this=0x199ef00, __in_chrg=<optimized out>) at /shared/src/kactivities-5.12.0/src/service/plugins/sqlite/Database.cpp:50
#15 operator() (this=<optimized out>, __ptr=0x199ef00) at /usr/include/c++/5.2.0/bits/unique_ptr.h:76
#16 ~unique_ptr (this=0x7f82cb9de700 <resourcesDatabase()::instance+16>, __in_chrg=<optimized out>) at /usr/include/c++/5.2.0/bits/unique_ptr.h:236
#17 ~d_ptr (this=0x7f82cb9de700 <resourcesDatabase()::instance+16>, __in_chrg=<optimized out>) at /shared/src/kactivities-5.12.0/src/utils/d_ptr_implementation.h:44
#18 ResourcesDatabaseMigrator::~ResourcesDatabaseMigrator (this=0x7f82cb9de6f0 <resourcesDatabase()::instance>, __in_chrg=<optimized out>) at /shared/src/kactivities-5.12.0/src/service/plugins/sqlite/Database.cpp:111
#19 0x00007f82f1940e78 in __run_exit_handlers () from /usr/lib/libc.so.6
#20 0x00007f82f1940ec5 in exit () from /usr/lib/libc.so.6
#21 0x00007f82e79d95de in QXcbConnection::processXcbEvents (this=0x18d64d0) at qxcbconnection.cpp:1377
#22 0x00007f82f22f9eb1 in QObject::event (this=0x18d64d0, e=<optimized out>) at kernel/qobject.cpp:1246
#23 0x00007f82f22ca769 in QCoreApplication::notify (this=<optimized out>, receiver=<optimized out>, event=<optimized out>) at kernel/qcoreapplication.cpp:1038
#24 0x00007f82f22ca89b in QCoreApplication::notifyInternal (this=0x7fff4e4a6540, receiver=0x18d64d0, event=event@entry=0x7f82e00047e0) at kernel/qcoreapplication.cpp:965
#25 0x00007f82f22ccc96 in sendEvent (event=0x7f82e00047e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#26 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x18cbc20) at kernel/qcoreapplication.cpp:1593
#27 0x00007f82f22cd178 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#28 0x00007f82f2320e33 in postEventSourceDispatch (s=0x191d5d0) at kernel/qeventdispatcher_glib.cpp:271
#29 0x00007f82ee0f7a17 in g_main_dispatch (context=0x7f82e00016f0) at gmain.c:3122
#30 g_main_context_dispatch (context=context@entry=0x7f82e00016f0) at gmain.c:3737
#31 0x00007f82ee0f7c70 in g_main_context_iterate (context=context@entry=0x7f82e00016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3808
#32 0x00007f82ee0f7d1c in g_main_context_iteration (context=0x7f82e00016f0, may_block=may_block@entry=1) at gmain.c:3869
#33 0x00007f82f232123f in QEventDispatcherGlib::processEvents (this=0x1910020, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#34 0x00007f82f22c826a in QEventLoop::exec (this=this@entry=0x7fff4e4a63f0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#35 0x00007f82f22d020c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#36 0x00007f82f282140c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1528
#37 0x0000000000411ed4 in main (argc=2, argv=<optimized out>) at /shared/src/kactivities-5.12.0/src/service/Application.cpp:414
Single stepping until exit from function _ZN12QSqlDatabaseD1Ev@plt,
which has no line number information.

Breakpoint 2, QSqlDatabase::~QSqlDatabase (this=0x199c870, __in_chrg=<optimized out>) at kernel/qsqldatabase.cpp:798
798	    if (!d->ref.deref()) {
QSqlDatabase::~QSqlDatabase (this=0x199c870, __in_chrg=<optimized out>) at kernel/qsqldatabase.cpp:802
802	}
operator() (this=<optimized out>, __ptr=0x199c870) at /usr/include/c++/5.2.0/bits/unique_ptr.h:76
76		delete __ptr;
Continuing.

Breakpoint 2, 0x00007f82cb57f0d0 in QSqlDatabase::~QSqlDatabase()@plt () from /usr/lib/libQt5Sql.so.5
#0  0x00007f82cb57f0d0 in QSqlDatabase::~QSqlDatabase()@plt () from /usr/lib/libQt5Sql.so.5
#1  0x00007f82cb586e1d in ~QHashNode (this=<optimized out>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qhash.h:237
#2  QHash<QString, QSqlDatabase>::deleteNode2 (node=0x19c32d0) at ../../include/QtCore/../../src/corelib/tools/qhash.h:585
#3  0x00007f82f214d289 in QHashData::free_helper (this=0x19b87c0, node_delete=0x7f82cb586e10 <QHash<QString, QSqlDatabase>::deleteNode2(QHashData::Node*)>) at tools/qhash.cpp:491
#4  0x00007f82cb583553 in freeData (this=0x7f82cb7afd00 <(anonymous namespace)::Q_QGS_dbDict::innerFunction()::holder>, x=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qhash.h:621
#5  ~QHash (this=0x7f82cb7afd00 <(anonymous namespace)::Q_QGS_dbDict::innerFunction()::holder>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qhash.h:342
#6  ~QConnectionDict (this=0x7f82cb7afd00 <(anonymous namespace)::Q_QGS_dbDict::innerFunction()::holder>, __in_chrg=<optimized out>) at kernel/qsqldatabase.cpp:110
#7  (anonymous namespace)::Q_QGS_dbDict::Holder::~Holder (this=0x7f82cb7afd00 <(anonymous namespace)::Q_QGS_dbDict::innerFunction()::holder>, __in_chrg=<optimized out>) at kernel/qsqldatabase.cpp:126
#8  0x00007f82cb583553 in operator() (this=<synthetic pointer>) from /usr/lib/libQt5Sql.so.5
#9  QSqlDatabase::contains (connectionName=...) at kernel/qsqldatabase.cpp:627
#10 0x00007f82f1940e78 in __run_exit_handlers () from /usr/lib/libc.so.6
#11 0x00007f82f1940ec5 in exit () from /usr/lib/libc.so.6
#12 0x00007f82e79d95de in QXcbConnection::processXcbEvents (this=0x18d64d0) at qxcbconnection.cpp:1377
#13 0x00007f82f22f9eb1 in QObject::event (this=0x18d64d0, e=<optimized out>) at kernel/qobject.cpp:1246
#14 0x00007f82f22ca769 in QCoreApplication::notify (this=<optimized out>, receiver=<optimized out>, event=<optimized out>) at kernel/qcoreapplication.cpp:1038
#15 0x00007f82f22ca89b in QCoreApplication::notifyInternal (this=0x7fff4e4a6540, receiver=0x18d64d0, event=event@entry=0x7f82e00047e0) at kernel/qcoreapplication.cpp:965
#16 0x00007f82f22ccc96 in sendEvent (event=0x7f82e00047e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x18cbc20) at kernel/qcoreapplication.cpp:1593
#18 0x00007f82f22cd178 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#19 0x00007f82f2320e33 in postEventSourceDispatch (s=0x191d5d0) at kernel/qeventdispatcher_glib.cpp:271
#20 0x00007f82ee0f7a17 in g_main_dispatch (context=0x7f82e00016f0) at gmain.c:3122
#21 g_main_context_dispatch (context=context@entry=0x7f82e00016f0) at gmain.c:3737
#22 0x00007f82ee0f7c70 in g_main_context_iterate (context=context@entry=0x7f82e00016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3808
#23 0x00007f82ee0f7d1c in g_main_context_iteration (context=0x7f82e00016f0, may_block=may_block@entry=1) at gmain.c:3869
#24 0x00007f82f232123f in QEventDispatcherGlib::processEvents (this=0x1910020, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#25 0x00007f82f22c826a in QEventLoop::exec (this=this@entry=0x7fff4e4a63f0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#26 0x00007f82f22d020c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#27 0x00007f82f282140c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1528
#28 0x0000000000411ed4 in main (argc=2, argv=<optimized out>) at /shared/src/kactivities-5.12.0/src/service/Application.cpp:414
Single stepping until exit from function _ZN12QSqlDatabaseD1Ev@plt,
which has no line number information.

Breakpoint 2, QSqlDatabase::~QSqlDatabase (this=0x19c32e8, __in_chrg=<optimized out>) at kernel/qsqldatabase.cpp:798
798	    if (!d->ref.deref()) {
796	QSqlDatabase::~QSqlDatabase()
799	        close();

Breakpoint 3, 0x00007f82cb57f5f0 in QSqlDatabase::close()@plt () from /usr/lib/libQt5Sql.so.5
Single stepping until exit from function _ZN12QSqlDatabase5closeEv@plt,
which has no line number information.
0x00007f82cb57e680 in ?? () from /usr/lib/libQt5Sql.so.5
Run till exit from #0  0x00007f82cb57e680 in ?? () from /usr/lib/libQt5Sql.so.5

Breakpoint 3, QSqlDatabase::close (this=this@entry=0x19c32e8) at kernel/qsqldatabase.cpp:871
871	    d->driver->close();
$4 = {<QObject> = {_vptr.QObject = 0x7f82cb339c50, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7f82f24232e0 <qt_meta_stringdata_QObject>, data = 0x7f82f24231c0 <qt_meta_data_QObject>, static_metacall = 0x7f82f23016a0 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x19c3190}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7f82f246d3e0 <qt_meta_stringdata_Qt>, data = 0x7f82f246a9e0 <qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x7f82f2707b80 <QObject::staticMetaObject>, stringdata = 0x7f82cb5a58e0 <qt_meta_stringdata_QSqlDriver>, data = 0x7f82cb5a5820 <qt_meta_data_QSqlDriver>, static_metacall = 0x7f82cb5a4890 <QSqlDriver::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
$5 = {
  <QObject> = {
    _vptr.QObject = 0x7f82cb339c50, 
    static staticMetaObject = {
      d = {
        superdata = 0x0, 
        stringdata = 0x7f82f24232e0 <qt_meta_stringdata_QObject>, 
        data = 0x7f82f24231c0 <qt_meta_data_QObject>, 
        static_metacall = 0x7f82f23016a0 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
        relatedMetaObjects = 0x0, 
        extradata = 0x0
      }
    }, 
    d_ptr = {
      d = 0x19c3190
    }, 
    static staticQtMetaObject = {
      d = {
        superdata = 0x0, 
        stringdata = 0x7f82f246d3e0 <qt_meta_stringdata_Qt>, 
        data = 0x7f82f246a9e0 <qt_meta_data_Qt>, 
        static_metacall = 0x0, 
        relatedMetaObjects = 0x0, 
        extradata = 0x0
      }
    }
  }, 
  members of QSqlDriver: 
  static staticMetaObject = {
    d = {
      superdata = 0x7f82f2707b80 <QObject::staticMetaObject>, 
      stringdata = 0x7f82cb5a58e0 <qt_meta_stringdata_QSqlDriver>, 
      data = 0x7f82cb5a5820 <qt_meta_data_QSqlDriver>, 
      static_metacall = 0x7f82cb5a4890 <QSqlDriver::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
      relatedMetaObjects = 0x0, 
      extradata = 0x0
    }
  }
}
$6 = (QSqlDatabasePrivate *) 0x19c3650
$7 = {
  ref = {
    <QAtomicInteger<int>> = {
      <QBasicAtomicInteger<int>> = {
        _q_value = 0
      }, <No data fields>}, <No data fields>}, 
  q = 0x7fff4e4a5a30, 
  driver = 0x19430b0, 
  dbname = {
    static null = {<No data fields>}, 
    d = 0x197c260
  }, 
  uname = {
    static null = {<No data fields>}, 
    d = 0x7f82f237dde0 <QArrayData::shared_null>
  }, 
  pword = {
    static null = {<No data fields>}, 
    d = 0x7f82f237dde0 <QArrayData::shared_null>
  }, 
  hname = {
    static null = {<No data fields>}, 
    d = 0x7f82f237dde0 <QArrayData::shared_null>
  }, 
  drvName = {
    static null = {<No data fields>}, 
    d = 0x19aefc0
  }, 
  port = -1, 
  connOptions = {
    static null = {<No data fields>}, 
    d = 0x7f82f237dde0 <QArrayData::shared_null>
  }, 
  connName = {
    static null = {<No data fields>}, 
    d = 0x19c3370
  }, 
  precisionPolicy = QSql::LowPrecisionDouble
}

Program received signal SIGSEGV, Segmentation fault.
0x00007f82cb583881 in QSqlDatabase::close (this=this@entry=0x19c32e8) at kernel/qsqldatabase.cpp:871
871	    d->driver->close();

Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.