QT4.2 corrupted double-linked list and QRadioButton existance

[mtrpoland]

Below are links to working application (I have circumvented the problem above) and package of code files and file containing some data to test program (one humble *.dat file).

Anyway, I would be glad if someone experienced checked some of my code for bugs and bad habits. I know it is difficult to ask you for such thing but marcel suggested such a solution himself.

The "funny" thing is when I de-comment code connected to QTranslator in main.cpp I get SIGSEV gift.
In other words I cannot translate my application using .ts file made by Linguist.

So my inference is that there is some crucial memory management bug in MY code that sometimes throws irrational SIGSEV, blocking me of using certain normal ways of programming.

I just cannot find it!

Program and code package in:
http://www.mjakobczyk.pl/pub/code/

[marcel]

I compiled your application( on Windows, Qt 4.3 ) but I cannot get it to crash( I uncommented the translator lines in main).
Could you say what steps are involved?

Regards

[jpn]

Here's at least one issue that prevents it from launching for me:

void MWin::initialization(void) {
	...
	tableViewWidget = new MyMVC(list); // list is yet uninitialized
	...
	list = new QList<MTR::Book>; // it's being initialized somewhere here afterwards
	...
}

void MWin::initialization(void) {
	...
	tableViewWidget = new MyMVC(list); // list is yet uninitialized
	...
	list = new QList<MTR::Book>; // it's being initialized somewhere here afterwards
	...
}

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I would suggest allocating QList objects on the stack and passing them as references. Allocating them on the heap is more error prone. QList is an implicitly shared class so unmodified copies are cheap.

[marcel]

Yeah, that and correct the following from:

namespace MTR {
class Book;
class SBook;
}

namespace MTR {
class Book;
class SBook;
}

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to:

namespace MTR {
class Book;
struct SBook;
}

namespace MTR {
class Book;
struct SBook;
}

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I was getting a few warnings and a linker error because of this.

Regards

[mtrpoland]

Gentlemen, now all indeed does work. A nod of respect. Thank you very much. Now I see that the key was what highlighted jpn. It destabilized my application.