(gdb) 
(gdb) bt
#0  Ekos::FilterManager::getFilterPosition (this=0x0, forceRefresh=forceRefresh@entry=false) at ./kstars/ekos/auxiliary/filtermanager.cpp:371
#1  0x0000555555ce7fa7 in Ekos::CaptureDeviceAdaptor::updateFilterPosition (this=0x55555ac09140) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:301
#2  0x00007ffff4cf1793 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x0000555555d128f6 in Ekos::SequenceJobState::prepareTargetFilter (isPreview=<optimized out>, frameType=FRAME_BIAS, this=0x55555a9da0a0)
    at ./kstars/ekos/capture/sequencejobstate.cpp:253
#4  Ekos::SequenceJobState::initCapture (this=0x55555a9da0a0, frameType=FRAME_BIAS, isPreview=<optimized out>, isAutofocusReady=<optimized out>, mode=<optimized out>)
    at ./kstars/ekos/capture/sequencejobstate.cpp:125
#5  0x0000555555d05c5c in Ekos::SequenceJob::startCapturing (this=<optimized out>, autofocusReady=<optimized out>, mode=<optimized out>)
    at ./kstars/ekos/capture/sequencejob.cpp:510
#6  0x0000555555cd578f in Ekos::CaptureProcess::captureImage (this=0x55555ac09220) at ./kstars/ekos/capture/refocusstate.h:75
#7  0x0000555555cd7be0 in Ekos::CaptureProcess::executeJob (this=0x55555ac09220) at ./kstars/ekos/capture/captureprocess.cpp:694
#8  0x00007ffff4cf1793 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007ffff4cf1793 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x0000555555a62573 in Ekos::SequenceJob::prepareComplete (this=<optimized out>, _t1=<optimized out>)
    at ./obj-x86_64-linux-gnu/kstars/KStarsLib_autogen/VONTORZADU/moc_sequencejob.cpp:218
#11 0x00007ffff4cf1793 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x0000555555a625d6 in Ekos::SequenceJobState::prepareComplete (this=<optimized out>, _t1=<optimized out>)
    at ./obj-x86_64-linux-gnu/kstars/KStarsLib_autogen/VONTORZADU/moc_sequencejobstate.cpp:555
#13 0x00007ffff4cf1793 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x0000555555a62336 in Ekos::CaptureDeviceAdaptor::hasShutter (this=this@entry=0x55555ac09140, _t1=<optimized out>, _t1@entry=true)
    at ./obj-x86_64-linux-gnu/kstars/KStarsLib_autogen/VONTORZADU/moc_capturedeviceadaptor.cpp:520
#15 0x0000555555cedad9 in Ekos::CaptureDeviceAdaptor::queryHasShutter (this=0x55555ac09140) at ./kstars/ekos/capture/capturedeviceadaptor.cpp:755
#16 0x00007ffff4cf1793 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x0000555555d0eadf in Ekos::SequenceJobState::checkHasShutter (this=0x55555a9da0a0) at ./kstars/ekos/capture/sequencejobstate.cpp:579
#18 Ekos::SequenceJobState::checkDarksCoverReady (this=0x55555a9da0a0) at ./kstars/ekos/capture/sequencejobstate.cpp:366
#19 0x0000555555d0fa95 in Ekos::SequenceJobState::checkAllActionsReady (this=0x55555a9da0a0) at ./kstars/ekos/capture/sequencejobstate.cpp:190
#20 Ekos::SequenceJobState::checkAllActionsReady (this=0x55555a9da0a0) at ./kstars/ekos/capture/sequencejobstate.cpp:142
#21 0x00007ffff4cf1793 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x0000555555a64c47 in Ekos::CaptureDeviceAdaptor::newCCDTemperatureValue (this=<optimized out>, _t1=<optimized out>)
    at ./obj-x86_64-linux-gnu/kstars/KStarsLib_autogen/VONTORZADU/moc_capturedeviceadaptor.cpp:422
#23 0x00007ffff4cf1793 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x0000555555a65b64 in ISD::Camera::newTemperatureValue (this=<optimized out>, _t1=<optimized out>)
    at ./obj-x86_64-linux-gnu/kstars/KStarsLib_autogen/FRI4DANIHA/moc_indicamera.cpp:416
#25 0x0000555555b333b4 in ISD::ConcreteDevice::updateProperty (this=0x7fffe8011210, prop=...) at ./kstars/indi/indiconcretedevice.cpp:62
#26 0x0000555555b32afb in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<INDI::Property>, void, void (ISD::ConcreteDevice::*)(INDI::Property)>::call
    (arg=<optimized out>, o=<optimized out>, f=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:152
#27 QtPrivate::FunctionPointer<void (ISD::ConcreteDevice::*)(INDI::Property)>::call<QtPrivate::List<INDI::Property>, void> (arg=<optimized out>, o=<optimized out>, 
    f=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:185
#28 QtPrivate::QSlotObject<void (ISD::ConcreteDevice::*)(INDI::Property), QtPrivate::List<INDI::Property>, void>::impl (which=<optimized out>, this_=<optimized out>, 
    r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:418
#29 0x00007ffff4cf1793 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x0000555555a69ad9 in ISD::GenericDevice::propertyUpdated (this=this@entry=0x55555c560050, _t1=...)
--Type <RET> for more, q to quit, c to continue without paging--
    at ./obj-x86_64-linux-gnu/kstars/KStarsLib_autogen/FRI4DANIHA/moc_indistd.cpp:680
#31 0x0000555555b2898e in ISD::GenericDevice::processNumber (this=this@entry=0x55555c560050, prop=...) at ./kstars/indi/indistd.cpp:441
#32 0x0000555555b26187 in ISD::GenericDevice::updateProperty (this=0x55555c560050, prop=...) at ./kstars/indi/indistd.cpp:289
#33 0x0000555555b316bc in INDIListener::updateProperty (this=<optimized out>, prop=...) at ./kstars/indi/indilistener.cpp:196
#34 0x0000555555b2f55b in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<INDI::Property>, void, void (INDIListener::*)(INDI::Property)>::call (
    arg=<optimized out>, o=<optimized out>, f=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:152
#35 QtPrivate::FunctionPointer<void (INDIListener::*)(INDI::Property)>::call<QtPrivate::List<INDI::Property>, void> (arg=<optimized out>, o=<optimized out>, 
    f=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:185
#36 QtPrivate::QSlotObject<void (INDIListener::*)(INDI::Property), QtPrivate::List<INDI::Property>, void>::impl (which=<optimized out>, this_=<optimized out>, 
    r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:418
#37 0x00007ffff4ce741e in QObject::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007ffff596c713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#39 0x00007ffff4cb9e3a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007ffff4cbcf27 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#41 0x00007ffff4d13a67 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#42 0x00007ffff3ffed3b in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007ffff4054258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x00007ffff3ffc3e3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007ffff4d130b8 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#46 0x00007ffff4cb875b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007ffff4cc0cf4 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x00005555556ffb2a in main (argc=<optimized out>, argv=<optimized out>) at ./kstars/main.cpp:386
(gdb)