Unusaul error message

[navya.dubey]

I am building a project in QT 5.6 with mingw compiler on windows platform.
My project works fine if I work in the desired manner but if after a window is open (ex A dialogue box is open for loading some file) and if I close that dialogue box without choosing any item just by hitting the cross icon then it shows an error dialogue box as follows:-

and after this it stops working

Could someone suggest the reason for such error?

[Kaluss]

Do you have something in windows destructors?

Try to run app in debug mode.

[Vinod Kuntoji]

@navya-dubey ,

Are you using threads,timers?

[Konstantin Tokarev]

Probably there is memory corruption in your applciation, e.g. use after free

[BjornW]

Show some code ^_^