Hi Qt embedded Application is getting crashed.

[Kadappa]

Hi,

I am working embedded application(yocto linux 32 arm gcc).

My application is getting crashed after some operations. After Back trace, it is pointing at 0x764f5818 in ?? () from /usr/lib/libQt5Qml.so.5 . I am anticipating it is because of qml since it is pointing at libQt5Qml.so.5 . I am using loader in qml. Please can anybody help me on this.

Regards,
Kadappa Pujari.

[sierdzio]

You need to provide far more information:

• which Qt version?
• does it also crash when you run your app on desktop?
• what does debugger / valgrind / address sanitizer tell you about the crash?
• have you tried simplifying the code, running a minimal sample app to verify that it works correctly?

[Kadappa]

Qt version is 5.12.3
No It will not crash on desktop. It crashes on embedded device.
Below is Back trace about crash.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
Core was generated by `./Source -platform eglfs'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x6294a240 in ?? ()
[Current thread is 1 (Thread 0x73492010 (LWP 1362))]
(gdb) bt
#0 0x6294a240 in ?? ()
#1 0x764cc818 in ?? () from /usr/lib/libQt5Qml.so.5
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb)

have you tried simplifying the code, running a minimal sample app to verify that it works correctly? Yes I have tried it is working fine.

[dheerendra]

Hope Qt version on the host & what you have embedded system are same. Ensure that version matches.

[sierdzio]

That stack trace does not say much. Try compiling your code with address sanitizer, it should print a better stack trace and crash info.

If possible, upgrade Qt to newest version (in 5.12 branch that's 5.12.6), perhaps it is a bug in Qt and is already fixed.

[Kadappa]

Thanks Dheerendra and sierdzio. Issue is resolved.

@sierdzio , yes you are correct, it is Qt issue in libQt5Qml.so.5.12.3 and it is fixed in libQt5Qml.so.5.12.5.

Thanks,
Kadappa Pujari