c++ - How to investigate the cause of the application crash? -


my os ubuntu 16.04.1 x64 , qt version 5.8.0.

i have application based on qt quick 2. application captures images webcam through opencv3 videocapture, , shows images fullscreen.

when rapidly switch window (by alt + tab) after running application, cause xorg die in low possible.

how can investigate problem?

compile application -g flag

from command prompt, call

ulimit -c unlimited

run application application should core dump.

you can examine core using

gdb <app> core

at gdb prompt type bt callstack.


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