astroberry@astroberry:~ $ gdb --ex run --args kstars
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Reading symbols from kstars...Reading symbols from /usr/lib/debug/.build-id/c5/860b9949f520ff42102eb472527e43742253c1.debug...done.
done.
Starting program: /usr/bin/kstars 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
[New Thread 0xafa61090 (LWP 1660)]
libEGL warning: DRI2: failed to authenticate
[New Thread 0xaa284090 (LWP 1665)]
[New Thread 0xa98ff090 (LWP 1666)]
[New Thread 0xa8eff090 (LWP 1667)]
[New Thread 0xa86fe090 (LWP 1668)]
[New Thread 0xa7efd090 (LWP 1669)]
[New Thread 0xa72ff090 (LWP 1670)]
[New Thread 0xa6afe090 (LWP 1671)]
[New Thread 0xa60ff090 (LWP 1672)]
qt5ct: using qt5ct plugin
[New Thread 0xa52c4090 (LWP 1673)]
[New Thread 0xa4451090 (LWP 1674)]
[New Thread 0xa2450090 (LWP 1675)]
[New Thread 0xa044f090 (LWP 1676)]
[New Thread 0x9d957090 (LWP 1677)]
[New Thread 0x9ce7b090 (LWP 1678)]
[New Thread 0x9c67a090 (LWP 1679)]
[New Thread 0x9ba84090 (LWP 1680)]
[New Thread 0x9959e090 (LWP 1681)]
[New Thread 0x98d9d090 (LWP 1682)]
[New Thread 0x9859c090 (LWP 1683)]
[New Thread 0x97d9b090 (LWP 1684)]
[Thread 0x97d9b090 (LWP 1684) exited]
[Thread 0x9959e090 (LWP 1681) exited]
[Detaching after fork from child process 1685]
[Detaching after fork from child process 1686]
[Detaching after fork from child process 1687]
[New Thread 0x9959e090 (LWP 1691)]
[Thread 0x9859c090 (LWP 1683) exited]
[New Thread 0x9859c090 (LWP 1696)]

Thread 1 "kstars" received signal SIGSEGV, Segmentation fault.
0x00cd7ab8 in INDI::BaseDevice::getRawProperty(char const*, INDI_PROPERTY_TYPE)
    ()
(gdb) bt
#0  0x00cd7ab8 in INDI::BaseDevice::getRawProperty(char const*, INDI_PROPERTY_TYPE) ()
#1  0x008de388 in Ekos::Mount::syncTelescopeInfo (this=this@entry=0x42b4c58)
    at ./kstars/kstars/ekos/mount/mount.cpp:331
#2  0x008df09c in Ekos::Mount::setTelescope (this=0x42b4c58, 
    newTelescope=newTelescope@entry=0x3d48208)
    at ./kstars/kstars/ekos/mount/mount.cpp:297
#3  0x007d93d4 in Ekos::Manager::setTelescope (this=0x3d30c60, 
    scopeDevice=0x3d48208) at /usr/include/c++/8/bits/unique_ptr.h:342
#4  0xb4a3d380 in QMetaObject::activate(QObject*, int, int, void**) ()
   from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
#5  0x006b5dd8 in INDIListener::newTelescope (this=this@entry=0x3789728, 
    _t1=<optimized out>)
    at ./obj-arm-linux-gnueabihf/kstars/KStarsLib_autogen/FRI4DANIHA/moc_indilistener.cpp:401
#6  0x00758b38 in INDIListener::registerProperty (this=0x3789728, 
    prop=0xa99544b8) at ./kstars/kstars/indi/indilistener.cpp:255
#7  0xb4a39c68 in QMetaCallEvent::placeMetaCall(QObject*) ()
   from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
#8  0xb4a3dbec in QObject::event(QEvent*) ()
   from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
#9  0xb5332db4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
   from /usr/lib/arm-linux-gnueabihf/libQt5Widgets.so.5
--Type <RET> for more, q to quit, c to continue without paging--
#10 0xb533b2a8 in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/arm-linux-gnueabihf/libQt5Widgets.so.5
#11 0x03789728 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) Quit
(gdb)