#0  QAbstractItemView::currentIndex (this=0x7f3f20)
    at itemviews/qabstractitemview.cpp:1031
#1  0x000000000044353c in QSampler::InstrumentListForm::stabilizeForm (this=
    0x7f15f0) at src/qsamplerInstrumentListForm.cpp:331
#2  0x0000000000443c03 in QSampler::InstrumentListForm::refreshInstruments (
    this=0x7f15f0) at src/qsamplerInstrumentListForm.cpp:195
#3  0x000000000047086a in QSampler::MainForm::startClient (this=0x7fffffffd820)
    at src/qsamplerMainForm.cpp:2776
#4  0x0000000000470c04 in QSampler::MainForm::timerSlot (this=0x7fffffffcaa0)
    at src/qsamplerMainForm.cpp:2467
#5  0x0000000000478b3b in QSampler::MainForm::qt_metacall (
    this=0x7fffffffd820, _c=QMetaObject::InvokeMetaMethod, _id=0, 
    _a=0x7fffffffcd90) at .moc/moc_qsamplerMainForm.cpp:154
#6  0x00007ffff697f547 in QMetaObject::activate (sender=0x704170, 
    m=<value optimized out>, local_signal_index=<value optimized out>, 
    argv=0x7ffff6c9d160) at kernel/qobject.cpp:3278
#7  0x00007ffff698475f in QSingleShotTimer::timerEvent (this=0x704170)
    at kernel/qtimer.cpp:308
#8  0x00007ffff6979359 in QObject::event (this=0x704170, e=0x7f3f20)
    at kernel/qobject.cpp:1181
#9  0x00007ffff6e684cc in QApplicationPrivate::notify_helper (this=0x6a0480, 
    receiver=0x704170, e=0x7fffffffd4a0) at kernel/qapplication.cpp:4462
#10 0x00007ffff6e6d96d in QApplication::notify (this=0x7fffffffdba0, 
    receiver=0x704170, e=0x7fffffffd4a0) at kernel/qapplication.cpp:4341
#11 0x00007ffff696788b in QCoreApplication::notifyInternal (this=
    0x7fffffffdba0, receiver=0x704170, event=0x7fffffffd4a0)
    at kernel/qcoreapplication.cpp:731
#12 0x00007ffff6996d9a in sendEvent (this=0x6a45c0)
    at kernel/qcoreapplication.h:215
#13 QTimerInfoList::activateTimers (this=0x6a45c0)
    at kernel/qeventdispatcher_unix.cpp:604
#14 0x00007ffff6993c58 in timerSourceDispatch (source=<value optimized out>)
    at kernel/qeventdispatcher_glib.cpp:184
#15 idleTimerSourceDispatch (source=<value optimized out>)
    at kernel/qeventdispatcher_glib.cpp:231
#16 0x00007ffff52aec39 in g_main_dispatch (context=0x6a3440) at gmain.c:2441
#17 g_main_context_dispatch (context=0x6a3440) at gmain.c:3014
#18 0x00007ffff52b3178 in g_main_context_iterate (context=0x6a3440, 
    block=<value optimized out>, dispatch=<value optimized out>, 
    self=<value optimized out>) at gmain.c:3092
#19 0x00007ffff52b331e in g_main_context_iteration (context=0x6a3440, 
    may_block=1) at gmain.c:3155
#20 0x00007ffff69938fe in QEventDispatcherGlib::processEvents (this=0x6a0a80, 
    flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#21 0x00007ffff6f1af06 in QGuiEventDispatcherGlib::processEvents (this=
    0x7fffffffcaa0, flags=<value optimized out>)
    at kernel/qguieventdispatcher_glib.cpp:204
#22 0x00007ffff69665d2 in QEventLoop::processEvents (
    this=<value optimized out>, flags=
DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece or DW_OP_bit_piece.
) at kernel/qeventloop.cpp:149
#23 0x00007ffff696699d in QEventLoop::exec (this=0x7fffffffd760, flags=
DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece or DW_OP_bit_piece.
) at kernel/qeventloop.cpp:201
#24 0x00007ffff696aa1b in QCoreApplication::exec ()
    at kernel/qcoreapplication.cpp:1008
#25 0x0000000000416710 in main (argc=1, argv=<value optimized out>)
    at src/main.cpp:309