Hello again!

The 64-bit install of Raspberry Pi OS was successful. After building everything from source, I don’t seem to get out of memory crashes anymore. Yay! One less problem to deal with.

If the FITS Viewer is only used because the code hasn’t been updated to allow the use of the new non-ui method, it might be worth revisiting/updating at some point. I’m guessing it probably won’t be high on the list, but I think it would make the UX and App behaviour more consistent. I might have a crack at some point but at the moment I’m really unfamiliar with the source and mechanisms involved.

Thanks for your help @knro!

Read More...

Raspberry Pi 4 Memory
Apparently 64-bit Raspberry Pi OS is a thing . The forum post seems quite old and has no mention of it going out of beta, but the latest build is as recent as August of last year.

I might give it a go to see if I can build everything against it to squeeze that extra memory into userland processes. Hopefully it doesn't wind up being a waste of time...!



Use FITS Viewer Setting

At the risk of misunderstanding the way things work, I had a dive into the KStars source last night.
On Line 6298 of kstars/ekos/capture/capture.cpp , I found the following chunk (some bits removed for brevity):

// Check if we need to do flat field slope calculation if the user specified a desired ADU value
if( ..... ) {
    if (Options::useFITSViewer() == false)
    {
        Options::setUseFITSViewer(true);
        qCInfo(KSTARS_EKOS_CAPTURE) << "Enabling FITS Viewer...";
    }
    ....

So it appears that the "Use FITS Viewer" option is intentionally automatically enabled by the application.

At the risk of severely misunderstanding the reasons behind this operation, I can only assume that this is *required* in order for the software to process/gain access to the flat frames that are being captured, or the features of the software that allow it to perform operations against the captured flat frames (e.g., calculation of ADU peaks, and so on?)

If that block of code is literally just there to show the flats as they are being captured, can it just be removed? I suggest this change as the application currently alters the user-configured options without "consent", and also does not restore the state after it is done.

I don't really know anything about the internals of KStars so if anyone has anything to add on this front it would be appreciated!

Read More...

Hey @knro,

Memory
That's a very good point. I can't believe that didn't even occur to me.
You're absolutely right. I ran kstars up with gdb and set it to take 20 flats, and got this...



:( :( :( :( :( :(


I can't solve that problem, but I guess that just gives me more reason to want to stop the KStars FITS Viewer from appearing when the setting is unchecked.


Adaptive Sampling
Yep, it was on by default and is set to '4'.

Read More...

Greetings!

KStars/Ekos has been crashy on my Pi 4 and I have been trying to track down the cause. I do not have hard evidence (yet), but I suspect that the FITS Viewer may be at least partially to blame. When I disable the FITS Viewer, things seem to run much more reliably (though not all crashes are solved).

The two conditions that seem to trigger crashes with the FITS Viewer are when I zoom in significantly, and lots of images coming in quickly. Taking flats fits into the second category. In order to combat this, I run with the "Use FITS Viewer" option unchecked.

---

The point of this thread is that when I take images with "Flat" selected for the Type in Ekos:

  • Ekos displays all flat images in the KStars FITS Viewer despite the "Use FITS Viewer" setting being unchecked
    • This includes the initial calibration images taken to determine the flat duration, as well as the actual final flats
  • The "Use FITS Viewer" setting checkbox is automatically changed to checked by the application

I have attached a screen recording demonstrating the behaviour so you can see what it looks like / how to reproduce it. The short version is: queue up some "Flat" shots; ensure "Use FITS Viewer" is unchecked; start the capture process; get an unwanted KStars FITS Viewer pop-up; re-open the config window to see that "Use FITS Viewer" is now checked.

I presume this is not expected behaviour, but before I log an issue I want to make sure I've covered all my bases. I don't *think* that I'm missing any settings in any other areas that might affect this, but there are a lot of settings, and they are all in different places.

Is the software doing the wrong thing, or am I just doing something silly?

---

I have experienced this behaviour both in the KStars version released with Astroberry (whatever the latest build was in December/January just gone), as well as KStars compiled from source as of a few days ago (which I am using to attempt to track down the root cause of these issues).

Not that it should matter, but for what it's worth, the images in question are large (8288x5644 @ 16 bit mono), but I do also have a Raspberry Pi 4 with 8GB of memory and a 128GB high-speed SD card, so it's barely making a dent in terms of the throughput and capacity that I have available.

Thanks in advance!

---

Hardware
  • Raspberry Pi 4
    • 8GB Memory
    • 128GB High Speed SD Card
  • ZWO ASI294MM Pro CCD (Imaging)
  • ZWO ASI120MM-Mini CCD (Guiding)
  • HEQ5 Pro Mount (using EQMod Driver)
  • ZBlox GPS Dongle (using GPSD Driver)

Software
phd2@master (cd1d6a8e / 2021-02-19 17:16:21 -0500)
stellarsolver@master (820befc / 2021-02-13 17:05:49 -0500)
indi@master (4c3f1c60 / 2021-02-28 17:48:55 +0300)
indi-3rdparty@master (4d4b6f4 / 2021-03-02 10:41:28 +0300)
kstars@master (4194cd472 / 2021-03-01 14:41:22 +0300)

Read More...

Dan replied to the topic 'KStars/EQMod Segmentation Fault' in the forum. 3 months ago

Thanks @nou!

Some combination of installing the following packages seems to have gotten it working:

  • libqt5quickcontrols2-5
  • qt5quickcontrols2-5-dev
  • qml-module-qtquick-controls
  • libwxgtk3.0-gtk3-0v5
  • wx3.0-i18n

Last night I installed libqt5quickcontrols2-5 and qt5quickcontrols2-5-dev, and performed a rebuild of kstars (not sure if it was necessary but I did it anyway!)
This morning I installed the list supplied by @nou which only triggered qml-module-qtquick-controls, libwxgtk3.0-gtk3-0v5, libwxgtk3.0-gtk3-0v5-dev, and wx3.0-i18n.
I should have tried running it before I installed the list by @nou but I didn't think of it. Either way, something in there has done it.

Thank you both for your help, and also thank you for the debugging suggestion @nou - that will save me a wasted night at some point soon!

Cheers!

Read More...

Dan replied to the topic 'KStars/EQMod Segmentation Fault' in the forum. 3 months ago

Thanks @knro! I'm having a poke around now learning about QML and QT Quick.

I don't know if I've got the appropriate QT/Quick libraries installed on the pi so I'm grabbing and recompiling those now. Unfortunately things are slow-going because recompiling on the pi is a lengthy process.

Would I be correct in assuming that the QML gets built / is not a file accessed at runtime? I ask this as I can only find one copy of the mountbox.qml file on my raspberry pi, and that is in the repository path at 'kstars/data/qml/mount/mountbox.qml'.

Thank you for your response!

Read More...

Dan created a new topic ' KStars/EQMod Segmentation Fault' in the forum. 3 months ago

Greetings! This is my first post, so if I've put this in the wrong spot for a debugging/crash analysis question, please feel free to shuffle it around as necessary.

I am currently experiencing a segmentation fault when connecting to my HEQ5 Pro using the EQMod Mount driver, when running a debug build on my raspberry pi. I don't want to log it as a bug just yet because chances are that it's something that I've done (or not done) causing the segfault, hence why I'm posting here first.

I'm hoping for some help to try and figure out why I'm getting this segfault, so I can fix it up and get back to dealing with the original crashes...!

If I have not provided something that might be important please let me know and I'll gather it for you.

Thanks in advance!



Key Details

  • I am running on a Raspberry Pi 4 (8GB RAM)
  • I have performed a full build of the following software using standard the cmake instructions for each repo:



Background
I was originally running Astroberry on my Raspberry Pi, but I was having unpredictable crashes overnight. I tried doing a few things like enabling logging, and running stars from the command line to get visibility of additional STDOUT/STDERR output, but nothing useful was coming back and the crashes were silent. I was hoping to get a stack trace to figure out what was triggering the crashes but couldn't find a way to do it.

Fast forward to a few days ago. I've wiped the Pi and thrown on vanilla Raspbian Desktop, set up some basic stuff (VNC access, udev alias rules), grabbed the repos for the key software, and performed a build of it all. (Insert obligatory XKCD reference ).

I tried spinning things up, and was greeted with a segfault.



Steps
  1. Spin up gdb with 'gdb kstars'
  2. Type 'r' to run kstars
  3. After launch, dismiss tip of the day
  4. Open Ekos
  5. Select my 'Vector' profile (which has auto-connect unchecked)
  6. Click the 'Start' button to launch INDI from Ekos
  7. Click 'Connect' for GPSD, no issues
  8. Click 'Connect' for my CCD, no issues
  9. Click 'Connect' for my EQMod Mount, instant segmentation fault



Devices
  • SkyWatcher HEQ5 Pro Mount, attached via USB 2.0 direct to pi
  • ZWO ASI294MM Pro, attached via USB 3.0 direct to pi
  • UBlox GPS Dongle, attached via USB 2.0 direct to pi
  • Local ethernet cable, attached direct to onboard ethernet port on pi



Ekos Configuration
Ekos 'Vector' Profile:
  • Mode = Local
  • Guiding = Internal
  • Auto Connect = unchecked
  • Mount = EQMod Mount
  • CCD = ZWO CCD
  • Guider = ZWO CCD
  • AUX 1 = GPSD
  • Primary Scope = SkyWatcher ED80 (80mm aperture / 510mm focal including reducer)
  • Guide Scope = SkyWatcher Finderscope 9x50 (50mm aperture / 450mm focal length)



Debugger Output
pi@raspberrypi:~ $ gdb kstars 
GNU gdb (Raspbian 8.2.1-2) 8.2.1
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "arm-linux-gnueabihf".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from kstars...done.
(gdb) r
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 0xaf6740a0 (LWP 2023)]
qt5ct: using qt5ct plugin
[New Thread 0xa95460a0 (LWP 2024)]
[New Thread 0xa88d60a0 (LWP 2025)]
[New Thread 0xa66ff0a0 (LWP 2026)]
[New Thread 0xa44ff0a0 (LWP 2027)]
[New Thread 0xa18f40a0 (LWP 2028)]
[New Thread 0xa0a410a0 (LWP 2029)]
[New Thread 0xa00ff0a0 (LWP 2030)]
[New Thread 0x9f8fe0a0 (LWP 2031)]
[New Thread 0x9f0fd0a0 (LWP 2032)]
[New Thread 0x9e8fc0a0 (LWP 2033)]
[New Thread 0x9ddfb0a0 (LWP 2034)]
[New Thread 0x9bdfa0a0 (LWP 2035)]
[Thread 0x9bdfa0a0 (LWP 2035) exited]
[Thread 0xa0a410a0 (LWP 2029) exited]
[Thread 0x9f0fd0a0 (LWP 2032) exited]
[Thread 0xa00ff0a0 (LWP 2030) exited]
[Thread 0x9ddfb0a0 (LWP 2034) exited]
[Thread 0xa44ff0a0 (LWP 2027) exited]
[Thread 0xa66ff0a0 (LWP 2026) exited]
[Thread 0xa88d60a0 (LWP 2025) exited]
[New Thread 0x9ddfb0a0 (LWP 2036)]
[New Thread 0xa66ff0a0 (LWP 2037)]
[New Thread 0xa44ff0a0 (LWP 2038)]
[New Thread 0x9b1ff0a0 (LWP 2039)]
[Detaching after fork from child process 2040]
[Detaching after fork from child process 2041]
[Detaching after fork from child process 2042]
[New Thread 0xa88a30a0 (LWP 2046)]
[New Thread 0xa7e860a0 (LWP 2050)]
Dispatch command error(-1): Device ZWO CCD ASI294MM Pro not found
<setTextVector device="ZWO CCD ASI294MM Pro" name="DRIVER_INFO" state="Idle" timeout="60" timestamp="2021-03-03T10:26:28">
    <oneText name="DRIVER_NAME">
ZWO CCD
    </oneText>
    <oneText name="DRIVER_EXEC">
indi_asi_ccd
    </oneText>
    <oneText name="DRIVER_VERSION">
1.9
    </oneText>
    <oneText name="DRIVER_INTERFACE">
2
    </oneText>
</setTextVector>
Dispatch command error(-1): 
<setTextVector device="GPSD" name="TIME_UTC" state="Busy" timeout="60" timestamp="2021-03-03T10:26:32">
    <oneText name="UTC"/>
    <oneText name="OFFSET"/>
</setTextVector>
Dispatch command error(-1): INDI: Could not find property GEOGRAPHIC_COORD in GPSD
<setNumberVector device="GPSD" name="GEOGRAPHIC_COORD" state="Busy" timeout="60" timestamp="2021-03-03T10:26:32">
    <oneNumber name="LAT">
0
    </oneNumber>
    <oneNumber name="LONG">
0
    </oneNumber>
    <oneNumber name="ELEV">
0
    </oneNumber>
</setNumberVector>
Dispatch command error(-1): INDI: Could not find property GEOGRAPHIC_COORD in GPSD
<setTextVector device="GPSD" name="GPS_STATUS" state="Busy" timeout="60" timestamp="2021-03-03T10:26:32">
    <oneText name="GPS_FIX"/>
</setTextVector>
Dispatch command error(-1): INDI: Could not find property POLARIS in GPSD
<setNumberVector device="GPSD" name="POLARIS" state="Busy" timeout="60" timestamp="2021-03-03T10:26:32">
    <oneNumber name="HA">
0
    </oneNumber>
</setNumberVector>
Dispatch command error(-1): INDI: Could not find property POLARIS in GPSD
<setSwitchVector device="GPSD" name="GPS_REFRESH" state="Busy" timeout="0" timestamp="2021-03-03T10:26:32">
    <oneSwitch name="REFRESH">
Off
    </oneSwitch>
</setSwitchVector>
Dispatch command error(-1): INDI: Could not find property POLARIS in GPSD
<setTextVector device="GPSD" name="GPS_STATUS" state="Busy" timeout="60" timestamp="2021-03-03T10:26:32">
    <oneText name="GPS_FIX">
NO FIX
    </oneText>
</setTextVector>
[New Thread 0xa0a410a0 (LWP 2055)]
[New Thread 0xa00ff0a0 (LWP 2056)]

Thread 1 "kstars" received signal SIGSEGV, Segmentation fault.
0xb4567068 in QObject::setProperty(char const*, QVariant const&) () from /lib/arm-linux-gnueabihf/libQt5Core.so.5
(gdb) bt
#0  0xb4567068 in QObject::setProperty(char const*, QVariant const&) () at /lib/arm-linux-gnueabihf/libQt5Core.so.5
#1  0x00c019a0 in Ekos::Mount::Mount() (this=0x4d036b0) at /home/pi/repos/kstars/kstars/ekos/mount/mount.cpp:231
#2  0x0095dff4 in Ekos::Manager::initMount() (this=0x4273b80) at /home/pi/repos/kstars/kstars/ekos/manager.cpp:2432
#3  0x00956750 in Ekos::Manager::setTelescope(ISD::GDInterface*) (this=0x4273b80, scopeDevice=0x4e73f40)
    at /home/pi/repos/kstars/kstars/ekos/manager.cpp:1439
#4  0x00998678 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<ISD::GDInterface*>, void, void (Ekos::Manager::*)(ISD::GDInterface*)>::call(void (Ekos::Manager::*)(ISD::GDInterface*), Ekos::Manager*, void**) (f=
    (void (Ekos::Manager::*)(Ekos::Manager * const, ISD::GDInterface *)) 0x9566a4 <Ekos::Manager::setTelescope(ISD::GDInterface*)>, o=0x4273b80, arg=0xbeffeb5c) at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:134
#5  0x00992d28 in QtPrivate::FunctionPointer<void (Ekos::Manager::*)(ISD::GDInterface*)>::call<QtPrivate::List<ISD::GDInterface*>, void>(void (Ekos::Manager::*)(ISD::GDInterface*), Ekos::Manager*, void**) (f=
    (void (Ekos::Manager::*)(Ekos::Manager * const, ISD::GDInterface *)) 0x9566a4 <Ekos::Manager::setTelescope(ISD::GDInterface*)>, o=0x4273b80, arg=0xbeffeb5c) at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:167
#6  0x009871fc in QtPrivate::QSlotObject<void (Ekos::Manager::*)(ISD::GDInterface*), QtPrivate::List<ISD::GDInterface*>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*)
    (which=1, this_=0x46b0230, r=0x4273b80, a=0xbeffeb5c, ret=0x0)
    at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:396
#7  0xb455f380 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/arm-linux-gnueabihf/libQt5Core.so.5
#8  0x007c342c in INDIListener::newTelescope(ISD::GDInterface*) (this=0x452ec88, _t1=0x4e73f40)
    at /home/pi/Projects/build/kstars/kstars/KStarsLib_autogen/FRI4DANIHA/moc_indilistener.cpp:401
#9  0x00895154 in INDIListener::registerProperty(INDI::Property*) (this=0x452ec88, prop=0x4e0dd70)
    at /home/pi/repos/kstars/kstars/indi/indilistener.cpp:256
#10 0x0089ab7c in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<INDI::Property*>, void, void (INDIListener::*)(INDI::Property*)>::call(void (INDIListener::*)(INDI::Property*), INDIListener*, void**) (f=
    (void (INDIListener::*)(INDIListener * const, INDI::Property *)) 0x894e00 <INDIListener::registerProperty(INDI::Property*)>, o=0x452ec88, arg=0x4e71a70) at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:134
#11 0x0089a5ac in QtPrivate::FunctionPointer<void (INDIListener::*)(INDI::Property*)>::call<QtPrivate::List<INDI::Property*>, void>(void (INDIListener::*)(INDI::Property*), INDIListener*, void**) (f=
    (void (INDIListener::*)(INDIListener * const, INDI::Property *)) 0x894e00 <INDIListener::registerProperty(INDI::Property*)>, o=0x452ec88, arg=0x4e71a70) at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:167
#12 0x008993d4 in QtPrivate::QSlotObject<void (INDIListener::*)(INDI::Property*), QtPrivate::List<INDI::Property*>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (which=1, this_=0x46b9400, r=0x452ec88, a=0x4e71a70, ret=0x0)
    at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:396
#13 0xb455bc68 in QMetaCallEvent::placeMetaCall(QObject*) () at /lib/arm-linux-gnueabihf/libQt5Core.so.5
#14 0xb455fbec in QObject::event(QEvent*) () at /lib/arm-linux-gnueabihf/libQt5Core.so.5
#15 0xb4ce2db4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/arm-linux-gnueabihf/libQt5Widgets.so.5
#16 0xb4ceb2a8 in QApplication::notify(QObject*, QEvent*) () at /lib/arm-linux-gnueabihf/libQt5Widgets.so.5
#17 0x0452ec88 in  ()
(gdb) where
#0  0xb4567068 in QObject::setProperty(char const*, QVariant const&) () at /lib/arm-linux-gnueabihf/libQt5Core.so.5
#1  0x00c019a0 in Ekos::Mount::Mount() (this=0x4d036b0) at /home/pi/repos/kstars/kstars/ekos/mount/mount.cpp:231
#2  0x0095dff4 in Ekos::Manager::initMount() (this=0x4273b80) at /home/pi/repos/kstars/kstars/ekos/manager.cpp:2432
#3  0x00956750 in Ekos::Manager::setTelescope(ISD::GDInterface*) (this=0x4273b80, scopeDevice=0x4e73f40)
    at /home/pi/repos/kstars/kstars/ekos/manager.cpp:1439
#4  0x00998678 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<ISD::GDInterface*>, void, void (Ekos::Manager::*)(ISD::GDInterface*)>::call(void (Ekos::Manager::*)(ISD::GDInterface*), Ekos::Manager*, void**) (f=
    (void (Ekos::Manager::*)(Ekos::Manager * const, ISD::GDInterface *)) 0x9566a4 <Ekos::Manager::setTelescope(ISD::GDInterface*)>, o=0x4273b80, arg=0xbeffeb5c) at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:134
#5  0x00992d28 in QtPrivate::FunctionPointer<void (Ekos::Manager::*)(ISD::GDInterface*)>::call<QtPrivate::List<ISD::GDInterface*>, void>(void (Ekos::Manager::*)(ISD::GDInterface*), Ekos::Manager*, void**) (f=
    (void (Ekos::Manager::*)(Ekos::Manager * const, ISD::GDInterface *)) 0x9566a4 <Ekos::Manager::setTelescope(ISD::GDInterface*)>, o=0x4273b80, arg=0xbeffeb5c) at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:167
#6  0x009871fc in QtPrivate::QSlotObject<void (Ekos::Manager::*)(ISD::GDInterface*), QtPrivate::List<ISD::GDInterface*>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*)
    (which=1, this_=0x46b0230, r=0x4273b80, a=0xbeffeb5c, ret=0x0)
    at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:396
#7  0xb455f380 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/arm-linux-gnueabihf/libQt5Core.so.5
#8  0x007c342c in INDIListener::newTelescope(ISD::GDInterface*) (this=0x452ec88, _t1=0x4e73f40)
    at /home/pi/Projects/build/kstars/kstars/KStarsLib_autogen/FRI4DANIHA/moc_indilistener.cpp:401
#9  0x00895154 in INDIListener::registerProperty(INDI::Property*) (this=0x452ec88, prop=0x4e0dd70)
    at /home/pi/repos/kstars/kstars/indi/indilistener.cpp:256
#10 0x0089ab7c in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<INDI::Property*>, void, void (INDIListener::*)(INDI::Property*)>::call(void (INDIListener::*)(INDI::Property*), INDIListener*, void**) (f=
    (void (INDIListener::*)(INDIListener * const, INDI::Property *)) 0x894e00 <INDIListener::registerProperty(INDI::Property*)>, o=0x452ec88, arg=0x4e71a70) at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:134
#11 0x0089a5ac in QtPrivate::FunctionPointer<void (INDIListener::*)(INDI::Property*)>::call<QtPrivate::List<INDI::Property*>, void>(void (INDIListener::*)(INDI::Property*), INDIListener*, void**) (f=
    (void (INDIListener::*)(INDIListener * const, INDI::Property *)) 0x894e00 <INDIListener::registerProperty(INDI::Property*)>, o=0x452ec88, arg=0x4e71a70) at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:167
#12 0x008993d4 in QtPrivate::QSlotObject<void (INDIListener::*)(INDI::Property*), QtPrivate::List<INDI::Property*>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (which=1, this_=0x46b9400, r=0x452ec88, a=0x4e71a70, ret=0x0)
    at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobjectdefs_impl.h:396
#13 0xb455bc68 in QMetaCallEvent::placeMetaCall(QObject*) () at /lib/arm-linux-gnueabihf/libQt5Core.so.5
#14 0xb455fbec in QObject::event(QEvent*) () at /lib/arm-linux-gnueabihf/libQt5Core.so.5
#15 0xb4ce2db4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/arm-linux-gnueabihf/libQt5Widgets.so.5
#16 0xb4ceb2a8 in QApplication::notify(QObject*, QEvent*) () at /lib/arm-linux-gnueabihf/libQt5Widgets.so.5
#17 0x0452ec88 in  ()
(gdb) frame 1
#1  0x00c019a0 in Ekos::Mount::Mount (this=0x4d036b0) at /home/pi/repos/kstars/kstars/ekos/mount/mount.cpp:231
231	    m_leftRightCheck->setProperty("checked", Options::leftRightReversed());
(gdb) print m_leftRightCheck
$1 = (QQuickItem *) 0x0
(gdb) frame 2
#2  0x0095dff4 in Ekos::Manager::initMount (this=0x4273b80) at /home/pi/repos/kstars/kstars/ekos/manager.cpp:2432
2432	    mountProcess.reset(new Ekos::Mount());
(gdb) frame 3
#3  0x00956750 in Ekos::Manager::setTelescope (this=0x4273b80, scopeDevice=0x4e73f40)
    at /home/pi/repos/kstars/kstars/ekos/manager.cpp:1439
1439	    initMount();


Read More...