QString::operator=(QString &) problem, after moving some functionality to so lib

[kornicameister]

I found out that the same problem occurs under Windows...

[ChrisW67]

What does the code inside those three functions look like?
What does the stack backtrace look like?
Are you sure that rec is valid and does it have columns called "fname", "lname" and "login"?

[kornicameister]

These questions are now irrelevant, however rec was valid, the problem was somewhere else, where I did not except it to come up.
I'd simply forgotten to properly create private objects in dll, so despite valid access to Worker object, this object itself was encountering the problem when accessing to private members via d_ptr...

so there is everything fine with QString and it was due to my neglect....