Re: Exception when deleting pointer in a struct

From:

"AliR" <AliR@online.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Thu, 3 Aug 2006 12:40:17 -0500

Message-ID:

<44d2353e$0$23763$a8266bb1@reader.corenews.com>

Maybe you are deleting an invalid pointer. Put a constructor in your struct
that initializes the struct.

typedef struct _MyStruct {
    CString Name;
    CString Path;
    CMyObj *pObj;
    HINSTANCE hModule;

_MyStruct() : pObj(NULL), hModule(NULL) { }

}MyStruct;

and see if that will help.

AliR.

"PaulH" <paul.heil@gmail.com> wrote in message
news:1154624815.363020.5430@i42g2000cwa.googlegroups.com...

I have a program with a structure object that looks like this:

typedef struct _MyStruct {
    CString Name;
    CString Path;
    CMyObj *pObj;
    HINSTANCE hModule;
}MyStruct;

I then initialize it as below:

func()
{
    MyStruct item;
    item.pObj = new CMyObj();
    item.Name = _T("Some Name");
    item.Path = _T("Some Path");
    item.hModule = AfxLoadLibrary(_T("Mylib.dll"));

    if (!VerifySomething())
    {
        //unload and cleanup
        delete item.pObj; //Exception occurs here
        AfxFreeLibrary(item.hModule);
    }
}

But, when I do the "delete item.pObj;" call, I sometimes (not always)
get an exception. This only happens in release mode, not in debug.

Does anybody know what's going on here?

Thanks,
PaulH